Plant Pathology
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Plant Pathology Quiz Questions and Answers
Diseases of Field Crops and Their Management
WHEAT
Q1. The alternate host of brown rust of wheat is __________.
- (a) Brassica sp
- (b) Thalictrum sp. ✅
- (c) Berberis sp.
- (d) Brinjal
Answer: Thalictrum sp.
Q2. Karnal bunt of wheat is caused by _________.
- (a) Ustilago nuda
- (b) Ustilaginoidea virens
- (c) Tilletia indica ✅
- (d) Ustilago scitaminae
Answer: Tilletia indica
Q3. The study of inter relationship between a pathogen, environment and host is called as _________.
- (a) Epidemiology ✅
- (b) Plant Pathology
- (c) Mycology
- (d) Epidermology
Answer: Epidemiology
Q4. Solar heat treatment is used to control __________.
- (a) Smut of bajra
- (b) Smut of sorghum
- (c) Loose smut of wheat ✅
- (d) None of above
Answer: Loose smut of wheat
Q5. The annual reoccurrence of rust of wheat (black rust) in the plains is through _________.
- (a) Telutospores
- (b) Basidiospores
- (c) Uredospores ✅
- (d) Acieospores
Answer: Uredospores
Q6. Alternate host of black stem rust of wheat is ________.
- (a) Berberis sp. ✅
- (b) Thalictrum sp.
- (c) Solanum sp.
- (d) None of above
Answer: Berberis sp.
Q7. Loose smut of wheat is a primarily _____.
- (a) Externally seed borne disease
- (b) Internally seed borne disease ✅
- (c) Both a & b
- (d) None of above
Answer: Internally seed borne disease
Q8. Brown rust of wheat is caused by _______.
- (a) Puccinia siriiformis
- (b) Puccinia recondita ✅
- (c) Puccinia graminis tritici
- (d) Ustilago tritici
Answer: Puccinia recondita
Q9. The typical example of monocyclic disease is ________.
- (a) Loose smut of wheat ✅
- (b) Sesame phyllody
- (c) Rice blast
- (d) Stem rust of wheat
Answer: Loose smut of wheat
Q10. Ear cockle of wheat is caused due to:
- (a) Alternaria triticina
- (b) Alternaria burnsi
- (c) Anguina tritici ✅
- (d) Alternaria solani
Answer: Anguina tritici
Q11. Tundu disease of wheat is caused due to ________:
- (a) Anguina tritici & Clavibacter tritici ✅
- (b) Alternaria triticina
- (c) Alternaria burnsi
- (d) Alternaria solani
Answer: Anguina tritici & Clavibacter tritici
Q12. Black stem rust of wheat is________ :
- (a) Autoecious rust
- (b) Heteroecious rust ✅
- (c) Autonomous rust
- (d) None of above
Answer: Heteroecious rust
Q13. Who invented the 'Solar Heat Treatment' for treating the seeds to control the loose smut wheat disease?
- (a) J.H. Kuhn
- (b) J.C. Walker
- (c) J.C. Luthra ✅
- (d) K.C. Mehta
Answer: J.C. Luthra
Q14. An entity that can cause disease in known as _______ :
- (a) Sign
- (b) Disease
- (c) Pathogen ✅
- (d) Host
Answer: Pathogen
Q15. The parasitic fungus requires two kinds of host plants of different families to complete its life cycle is called.
- (a) Collateral host
- (b) Alternate host ✅
- (c) Susceptible host
- (d) Resistant host
Answer: Alternate host
Q16. Curling and twisting of spikes with yellow slime on inflorescence and stem is a characteristic symptom in __________.
- (a) Tundu disease of wheat ✅
- (b) Root -knot disease of tobacco
- (c) Tobacco leaf curl
- (d) Loose smut of wheat
Answer: Tundu disease of wheat
Q17. Infective spore in barberry crop by black rust of wheat fungus is_________.
- (a) Uredospores
- (b) Basidiospores ✅
- (c) Teliospores
- (d) Aeciospores
Answer: Basidiospores
Q18. In stem rust of wheat pycniospore and aeciospore are produced on _______plant.
- (a) Wheat
- (b) Barberry ✅
- (c) Oat
- (d) Rice
Answer: Barberry
Q19. Mature teleutospore of wheat rust is _______.
- (a) Bicelled, binucleate ✅
- (b) Bicelled, uninucleated
- (c) Unicelled, uninucleated
- (d) None of above
Answer: Bicelled, binucleate
Q20. Luthra's 'Solar Heat Treatment' method is effective against ________.
- (a) Loose smut of wheat ✅
- (b) Rust of wheat
- (c) Karnal bunt
- (d) None of these
Answer: Loose smut of wheat
Q21. In which of the following wheat rust, elongated sori (pustules) are arranged in linear form on wheat leaf surface and forming stripes________?
- (a) Black rust
- (b) Yellow rust ✅
- (c) Brown rust
- (d) White rust
Answer: Yellow rust
Q22. Smutted Kernels are covered by grayish silver membrane, which soon burst and release black spore mass leaving naked rachis is a common symptom in _________.
- (a) Whip smut of sugarcane
- (b) Long smut of sorghum
- (c) Smut of bajra
- (d) Loose smut of wheat ✅
Answer: Loose smut of wheat
Q23. Black, yellow and brown rust of wheat are generally caused by :
- (a) Puccinia spp. ✅
- (b) Melampsora spp.
- (c) Uromyces spp.
- (d) Phragmidium spp.
Answer: Puccinia spp.
Q24. Yellow ear rot of wheat is caused by :
- (a) Nematode
- (b) Bacteria
- (c) Fungi
- (d) Both (a) & (b) ✅
Answer: Both (a) & (b)
Q25. The typical example of monocyclic disease is :
- (a) Loose smut of wheat ✅
- (b) Sesame phyllody
- (c) Rice blast
- (d) White rust of mustard
Answer: Loose smut of wheat
Q26. Brown rust of wheat is caused by :
- (a) Puccinia striiformis
- (b) Puccinia recondita ✅
- (c) Puccinia graminis tritici
- (d) Ustilago tritici
Answer: Puccinia recondita
Q27. First plant parasitic nematode was reported by….
- (a) N. A. Cobb
- (b) Prevost
- (c) T. Needham ✅
- (d) F.C. Bawden
Answer: T. Needham
Q28. Tilletia causes disease in wheat crop :
- (a) Rust
- (b) Bunt ✅
- (c) Smut
- (d) Downy mildew
Answer: Bunt
Q29. The annual reoccurrence of rust of wheat (black rust) in the plains is through :
- (a) Uredospores ✅
- (b) Aeciospores
- (c) Teleutospores
- (d) Basidiospores
Answer: Uredospores
Q30. Bacterial rot of wheat ears is also known as :
- (a) Spike blight
- (b) Tundu
- (c) Yellow slime disease
- (d) All above ✅
Answer: All above
Q31. Which stage of the wheat rust fungus is considered as the perfect stage ?
- (a) Uredial stage
- (b) Basidiopsore stage
- (c) Teleutospore stage ✅
- (d) None of above
Answer: Teleutospore stage
Q32. The loose smut of wheat fungus ( Ustilago nuda var. tritici ) survives as :
- (a) Basidiospores
- (b) Sclerotia
- (c) Dormant mycelium ✅
- (d) All above
Answer: Dormant mycelium
Q33. Tundu disease of wheat is caused by ________.
- (a) Nematode
- (b) Bacteria
- (c) Fungi
- (d) Both (a) & (b ) ✅
Answer: Both (a) & (b )
Q34. The contagious nature of wheat smut was shown by…
- (a) B.B. Mundakar
- (b) Anton de Berry
- (c) Prevost ✅
- (d) J.F. Dastur
Answer: Prevost
Q35. __________ is known as Father of Pathology.
- (a) Prevost
- (b) Anton de Berry ✅
- (c) Alexander Fleming
- (d) K.C. Mehta
Answer: Anton de Berry
Q36. Mancozeb is traded as _______.
- (a) Bavistin
- (b) Indofil M-45 ✅
- (c) Kasugamycin
- (d) Kavach
Answer: Indofil M-45
Q37. Alternate host of black stem rust of wheat is ________.
- (a) Thalictrum sp.
- (b) Mahonia sp. ✅
- (c) Solanum sp.
- (d) Sorghum
Answer: Mahonia sp.
Q38. Alternaria leaf spot in wheat is caused by ________.
- (a) Alternaria solani
- (b) Alternaria poori
- (c) Alternaria alternata
- (d) Alternaria triticina ✅
Answer: Alternaria triticina
Q39. Ear cockle of wheat was reported by ______ in the year 1743.
- (a) N. A. Cobb
- (b) Prevost
- (c) F.C. Bawden
- (d) T. Needham ✅
Answer: T. Needham
SORGHUM
Q40. The most serious smut among the smuts affecting sorghum in our country is _________.
- (a) Grain smut ✅
- (b) Long smut
- (c) Loose smut
- (d) Head smut
Answer: Grain smut
Q41. Striga/Witchweed in sorghum is a________:
- (a) Complete stem parasite
- (b) Partial stem parasite
- (c) Partial root parasite ✅
- (d) Complete root parasite
Answer: Partial root parasite
Q42. Striga is a semi- root flowering parasite of __________.
- (a) Black gram
- (b) Sorghum ✅
- (c) Green gram
- (d) Chickpea
Answer: Sorghum
Q43. Partial root parasite of sorghum is ________.
- (a) Cuscuta
- (b) Striga ✅
- (c) Orobanche
- (d) None of above
Answer: Striga
Q44. State the name of fruiting body produced by Colletotrichum spp. _______.
- (a) Pycnidium
- (b) Perithecium
- (c) Acervulus ✅
- (d) Apothecium
Answer: Acervulus
Q45. The grain smut of sorghum is also known as :
- (a) Covered smut
- (b) Short smut
- (c) Kernel smut
- (d) All above ✅
Answer: All above
Q46. Loose smut of sorghum is caused by_____.
- (a) Sphacelotheca sorghi
- (b) Tolyposporium ehrenbergii
- (c) Sphacelotheca cruenta ✅
- (d) Sphacelotheca reiliana
Answer: Sphacelotheca cruenta
Q47. Long smut of sorghum is caused by_____.
- (a) Sphacelotheca sorghi
- (b) Tolyposporium ehrenbergii ✅
- (c) Sphacelotheca cruenta
- (d) Sphacelotheca reiliana
Answer: Tolyposporium ehrenbergii
Q48. Head smut of sorghum is caused by_____.
- (a) Sphacelotheca sorghi
- (b) Tolyposporium ehrenbergii
- (c) Sphacelotheca cruenta
- (d) Sphacelotheca reiliana ✅
Answer: Sphacelotheca reiliana
Q49. Sugary disease/ergot of sorghum is caused by_____.
- (a) Sphacelia sorghi ✅
- (b) Tolyposporium ehrenbergii
- (c) Sphacelotheca cruenta
- (d) Sphacelotheca reiliana
Answer: Sphacelia sorghi
Q50. Anthracnose of sorghum is caused by_____.
- (a) Colletotrichum capsici
- (b) Colletotrichum graminicola ✅
- (c) Colletotrichum lindemuthianum
- (d) Colletotrichum falcatum
Answer: Colletotrichum graminicola
Q51. The botanical name of Striga/Witch weed is_________.
- (a) Striga parasitica
- (b) Striga densiflora
- (c) Striga asiatica
- (d) All above ✅
Answer: All above
PEARLMILLET (BAJRA)
Q52. The alternate host for pearl millet (bajra) rust is________.
- (a) Mustard
- (b) Tomato
- (c) Okra
- (d) Brinjal ✅
Answer: Brinjal
Q53. The primary source of inoculum of ergot of bajra survives as _________.
- (a) Acervuli
- (b) Uredospore
- (c) Sclerotial bodies ✅
- (d) Cleistothecia
Answer: Sclerotial bodies
Q54. Primary source of inoculum of downy mildew of bajra is carried out by_______.
- (a) Ascospores
- (b) Oospores ✅
- (c) Zygospores
- (d) All of the above
Answer: Oospores
Q55. Metalaxyl is traded as ________ :
- (a) Bavistin
- (b) Ridomil ✅
- (c) Kasugamycin
- (d) Kavach
Answer: Ridomil
Q56. Rust of pearl millet is caused due to ________ :
- (a) Puccinia striformis
- (b) Puccinia penniseti ✅
- (c) Puccinia recondita
- (d) Puccinia arachidis
Answer: Puccinia penniseti
Q57. Ergotin is produced by ________:
- (a) Colletotrichum falcatum
- (b) Claviceps fusiformis ✅
- (c) Tolyposporium penicillariae
- (d) None of above
Answer: Claviceps fusiformis
Q58. In downy mildew of bajra, the common symptom occurs as __________.
- (a) Stem is transformed into leafy structure
- (b) Root is transformed into leafy structure
- (c) Ear head is transformed into leafy structure ✅
- (d) All of the above
Answer: Ear head is transformed into leafy structure
Q59. Small droplets of light, honey coloured dew like substance exude from infected spilkelets is a common symptom in __________.
- (a) Ergot of bajra ✅
- (b) Smut of bajra
- (c) Downy mildew of bajra
- (d) None of the above
Answer: Ergot of bajra
Q60. Causal organism of smut of bajra is ________.
- (a) Tolyposporium penicillariae ✅
- (b) Sphacelotheca cruenta
- (c) Sphacelotheca reiliana
- (d) Ustilago nuda
Answer: Tolyposporium penicillariae
Q61. Smut spores of bajra pathogen produces _______ which can cause secondary infection to flowers.
- (a) Basidiospore
- (b) Sporidia ✅
- (c) Aeciospore
- (d) Oospore
Answer: Sporidia
Q62. Using of brine solution is effective against which disease of bajra crop?
- (a) Downy mildew of bajra
- (b) Rust of bajra
- (c) Ergot of bajra ✅
- (d) Smut of bajra
Answer: Ergot of bajra
Q63. A group of diseases caused by basidiomycetes are :
- (a) Mildew
- (b) Rot
- (c) Smut ✅
- (d) Ergot
Answer: Smut
Q64. The mode of infection in ergot of bajra is :
- (a) Shoot infection
- (b) Local infection of blossom ✅
- (c) Seedling infection
- (d) Systemic infection
Answer: Local infection of blossom
Q65. The direct infection and loss of floral organs as well as seed occurs in :
- (a) Karnal bunt of wheat
- (b) Ergot of bajra
- (c) Smut of pearl millet
- (d) All above ✅
Answer: All above
Q66. Bajra smut disease infect the plant at :
- (a) Seedling stage
- (b) Tillering stage
- (c) Flowering stage ✅
- (d) None of above
Answer: Flowering stage
Q67. Brinjal is an alternate host of ____.
- (a) Bajra rust ✅
- (b) Mustard rust
- (c) Wheat rust
- (d) Sunflower rust
Answer: Bajra rust
Q68. State the name of toxic substance produced by Claviceps fusiformis.
- (a) Fumaric acid
- (b) Fusaric acid
- (c) Ergotin ✅
- (d) Alternaric acid
Answer: Ergotin
Q69. ________ pathogen is an obligate parasite of bajra.
- (a) Sclerospora graminicola ✅
- (b) Albugo candida
- (c) Peronospora parasitica
- (d) Plasmporara viticola
Answer: Sclerospora graminicola
Q70. Sclerotia of ergot of bajra can be removed from the seed by floating them on:
- (a) Glycerol
- (b) Brine/salt solution ✅
- (c) Mustard oil
- (d) Kerosine
Answer: Brine/salt solution
Q71. Claviceps fusiformis causes ______ disease in bajra crop.
- (a) Downy mildew
- (b) Smut
- (c) Rust
- (d) Ergot ✅
Answer: Ergot
Q72. Sclerospora graminicola causes ______ disease in bajra crop.
- (a) Downy mildew ✅
- (b) Smut
- (c) Rust
- (d) Ergot
Answer: Downy mildew
Q73. Tolyposporium penicillariae causes ______ disease in bajra crop.
- (a) Downy mildew
- (b) Smut ✅
- (c) Rust
- (d) Ergot
Answer: Smut
Q74. Puccinia penniseti causes rust in which crop?
- (a) Rust of wheat
- (b) Rust of groundnut
- (c) Rust sunflower
- (d) Rust of bajra ✅
Answer: Rust of bajra
RICE
Q75. Deficiency of zinc in paddy is known as ______ disease.
- (a) Mosaic
- (b) Khaira ✅
- (c) Smut
- (d) Necrosis
Answer: Khaira
Q76. Wilting syndrome known as 'Kresek' occurs in ________.
- (a) False smut of paddy
- (b) Brown leaf spot of rice
- (c) Bacterial blight of rice ✅
- (d) Rice blast
Answer: Bacterial blight of rice
Q77. The disease responsible for the great Bengal famine in 1942 -43 is ______.
- (a) Rice Blast
- (b) Brown spot of rice ✅
- (c) False smut of rice
- (d) Wheat rust
Answer: Brown spot of rice
Q78. Khaira disease of rice can be controlled by spraying _______.
- (a) Copper sulphate
- (b) Borax
- (c) Manganese sulphate
- (d) Zinc sulphate ✅
Answer: Zinc sulphate
Q79. False smut of paddy is caused due to________:
- (a) Ustilago nuda
- (b) Ustilago sciaminea
- (c) Ustilaginoidea virens ✅
- (d) Ustilago avenae
Answer: Ustilaginoidea virens
Q80. Bronzing of paddy leaves is common symptom in __________.
- (a) Khaira disease ✅
- (b) Foot rot
- (c) Mosaic
- (d) Brown leaf spot
Answer: Khaira disease
Q81. Paddy blast pathogen survives on the collateral host such as ________.
- (a) Barberry
- (b) Brinjal
- (c) Triticum aestivum
- (d) Leersia hexandra ✅
Answer: Leersia hexandra
Q82. Which pathogen was responsible for the great Bengal famine in 1942 -43?
- (a) Pyricularia grisea
- (b) Helminthosporium oryzae ✅
- (c) Ustilaginoidea virens
- (d) Xanthomonas oryzae
Answer: Helminthosporium oryzae
Q83. Deficiency of Zn in paddy causes __________.
- (a) Chlorosis ✅
- (b) Necrosis
- (c) Mosaic
- (d) Smut
Answer: Chlorosis
Q84. The production of spindle shape spots is a characteristic of ____ disease.
- (a) Paddy blast ✅
- (b) Sesamum phyllody
- (c) Alternaria leaf spot
- (d) Cercospora leaf spot
Answer: Paddy blast
Q85. Ustilaginoidea virens causes ____________ disease in rice.
- (a) Blast of paddy
- (b) Blight of paddy
- (c) False smut of paddy ✅
- (d) Foot rot of paddy
Answer: False smut of paddy
Q86. Foot rot of paddy is caused by__________.
- (a) Helminthosporium oryzae
- (b) Ustilaginoidea virens
- (c) Xanthomonas oryzae
- (d) Fusarium moniliformae ✅
Answer: Fusarium moniliformae
Q87. Fusarium moniliformae causes ______ diseae in paddy.
- (a) Foot rot
- (b) Stem rot
- (c) Sheath rot
- (d) All above ✅
Answer: All above
MAIZE
Q88. Charcoal rot symptoms in maize are produced by _________:
- (a) Fusarium oxysporum
- (b) Melampsora lini
- (c) Macrophomina phaseolina ✅
- (d) Sclerotium rolfsii
Answer: Macrophomina phaseolina
Q89. Boat shaped leaf spots of maize is a common symptom in ________.
- (a) Turcicum leaf blight ✅
- (b) Maydis leaf blight
- (c) Macrophomina blight
- (d) Charcoal rot
Answer: Turcicum leaf blight
Q90. Primary source of inoculum of charcoal rot of maize is ________.
- (a) Sclerotia ✅
- (b) Oosopre
- (c) Chlamydospore
- (d) Zoosopre
Answer: Sclerotia
Q91. Macrophomina phaseolina causes disease in maize is known as_______.
- (a) Soft rot
- (b) Ear rot
- (c) Charcoal rot ✅
- (d) Top rot
Answer: Charcoal rot
Q92. Longitudinally elongated purplish spots surrounded by reddish brown margin on lower leaves of maize symptoms are produced in_____.
- (a) Turcicum leaf blight ✅
- (b) Maydis leaf blight
- (c) Macrophomina blight
- (d) Charcoal rot
Answer: Turcicum leaf blight
GROUNDNUT
Q93. Bud necrosis of groundnut is transmitted by __________.
- (a) Frankliniella schultzei
- (b) Scirtothrips dorsalis
- (c) Both a and b ✅
- (d) Myzus persicae
Answer: Both a and b
Q94. Chlorosis or Iron deficiency in groundnut is common in soils with pH____.
- (a) below 7.5
- (b) Above 8.5
- (c) 7.6 to 8.3 ✅
- (d) 8.5 to 10
Answer: 7.6 to 8.3
Q95. Which fungus is producing aflatoxin in groundnut ________?
- (a) Claviceps fusiformis
- (b) Aspergillus flavus ✅
- (c) Fusarium oxysporum
- (d) Aspergillus niger
Answer: Aspergillus flavus
Q96. Ground nut bud necrosis virus is transmitted by _______:
- (a) Thrips ✅
- (b) Aphids
- (c) Mites
- (d) Bugs
Answer: Thrips
Q97. Only one disease cycle occurring per season is:
- (a) Polycyclic disease
- (b) Polyetic disease
- (c) Multiple cycle disease
- (d) Monocyclic ✅
Answer: Monocyclic
Q98. Tikka disease of groundnut is caused by _______.
- (a) Colletotrichum spp.
- (b) Verticillium spp.
- (c) Fusarium spp.
- (d) Cercospora spp. ✅
Answer: Cercospora spp.
Q99. Ground nut chlorosis is caused due to the deficiency of ________ :
- (a) Iron ✅
- (b) Boron
- (c) Zinc
- (d) Manganase
Answer: Iron
Q100. Bud necrosis of groundnut is transmitted by __________.
- (a) Bemisia tabaci
- (b) Frankliniella schultzei ✅
- (c) Aphis gossypii
- (d) None of the above
Answer: Frankliniella schultzei
Q101. Collar rot of groundnut is caused by:
- (a) Rhizoctonia solani
- (b) Aspergillus niger ✅
- (c) Aspergillus flavus
- (d) Fusarium oxysporum
Answer: Aspergillus niger
Q102. Application of FeSO4 is recommended for the management of :
- (a) Khaira disease of rice
- (b) Yellow mosaic of mungbean
- (c) Chlorosis of groundnut ✅
- (d) Yellow rust of wheat
Answer: Chlorosis of groundnut
Q103. Stem rot of groundnut is caused by:
- (a) Sclerotium rolfsii ✅
- (b) Aspergillus niger
- (c) Cercospora arachidicola
- (d) Fusarium oxysporum
Answer: Sclerotium rolfsii
Q104. Stem rot of groundnut pathogen survives in the form of…
- (a) Oospores
- (b) Sclerotia ✅
- (c) Chlamydospores
- (d) Conidia
Answer: Sclerotia
Q105. Groundnut rust is ___________ .
- (a) Autonomus rust
- (b) Autoecious rust ✅
- (c) Heteroecious rust
- (d) None of the above
Answer: Autoecious rust
Q106. Which nematode is infecting groundnut crop.?
- (a) Anguina tritici
- (b) Rotylenchus reniformis
- (c) Meloidogyne arenaria ✅
- (d) Pratylenchus coffeae
Answer: Meloidogyne arenaria
Q107. Groundnut bud necrosis is caused by ______ virus.
- (a) Phytoplasma
- (b) Nicotiana virus -1
- (c) Nicotiana virus -10
- (d) Tomato spotted wilt virus ✅
Answer: Tomato spotted wilt virus
Q108. Which fungal biocontrol agent is recommended for the control of stem rot of groundnut?
- (a) Trichoderma harzianum ✅
- (b) Trichoderma hamatum
- (c) Aspergillus niger
- (d) Paecilomyces lilacinus
Answer: Trichoderma harzianum
Q109. Rust of groundnut is caused by_________.
- (a) Puccinia recondita
- (b) Puccinia avenae
- (c) Puccinia arachidis ✅
- (d) Puccinia graminis
Answer: Puccinia arachidis
CASTOR
Q110. State the name of toxic substance produced by Fusarium spp ______.
- (a) Fumaric acid
- (b) Fusaric acid ✅
- (c) Alternaric acid
- (d) Ergotin
Answer: Fusaric acid
Q111. Wilt of castor/cotton pathogen overwinters by forming resting spores ___ .
- (a) Chlamydospres ✅
- (b) Blastospores
- (c) Zygospores
- (d) Arthrospores
Answer: Chlamydospres
Q112. State the name of castor variety which is found resistant to wilt disease___.
- (a) GCH-7 ✅
- (b) GC-2
- (c) GCH-10
- (d) GCH-1
Answer: GCH-7
Q113. Wilt of castor caused by Fusarium oxysporum f.sp. ricini produces _____.
- (a) Macroconidia
- (b) Microconidia
- (c) Chlamydospores
- (d) All of the above ✅
Answer: All of the above
Q114. Flooding is the effective method to control :
- (a) Fusarium spp. ✅
- (b) Phytophthora spp.
- (c) Pythium spp.
- (d) Xanthomonas sp.
Answer: Fusarium spp.
Q115. Root rot of castor is caused by ____.
- (a) Fusarium oxysporum
- (b) Macrophomina phaseolina ✅
- (c) Alternaria ricini
- (d) Cercospora ricini
Answer: Macrophomina phaseolina
Q116. Tylosis formation in vascular system of root is a characteristic of _____.
- (a) Root rot of castor
- (b) Wilt of castor ✅
- (c) Charcoal rot of maize
- (d) Root rot of cotton
Answer: Wilt of castor
Q117. Alternaria leaf spot/blight in castor is caused by___________.
- (a) Alternaria alternata
- (b) Alternaria sesami
- (c) Alternaria solani
- (d) Alternaria ricini ✅
Answer: Alternaria ricini
MUSTARD
Q118. Downy mildew of mustard is caused by __________.
- (a) Plasmopara viticola
- (b) Claviceps fugiformis
- (c) Peronospora parasitica ✅
- (d) Sclerospora graminicola
Answer: Peronospora parasitica
Q119. White rust fungus 'Albugo candida' belongs to _______.
- (a) Basidiomycetes
- (b) Deuteromycetes
- (c) Ascomycetes
- (d) Oomycetes ✅
Answer: Oomycetes
Q120. Primary sources of inoculum of white rust of mustard survives as _______.
- (a) Ascospore
- (b) Oospore ✅
- (c) Zoospore
- (d) Conidia
Answer: Oospore
Q121. White rust of mustard is caused by _______:
- (a) Puccinia graminis var tritici
- (b) Puccinia arachidis
- (c) Puccinia recondita
- (d) Albugo crucifearum ✅
Answer: Albugo crucifearum
Q122. Which of the following is a pseudo-rust ?
- (a) Black rust
- (b) Yellow rust
- (c) Brown rust
- (d) White rust ✅
Answer: White rust
Q123. White rust of crucifers is called pseudo rust because :
- (a) The causal organism does not belong to rust family ✅
- (b) The disease occur on members of family crucifers
- (c) The color of the pustule is not brown
- (d) The disease has not been observed on wheat
Answer: The causal organism does not belong to rust family
Q124. In contrast to black rust, white rust is :
- (a) Autoecious rust
- (b) A disease of crucifers
- (c) It is a pseudo rust
- (d) All above ✅
Answer: All above
Q125. Primary sources of inoculum of downy mildew of mustard survives as: _______.
- (a) Oospore ✅
- (b) Zygospore
- (c) Aeciospre
- (d) Uredospore
Answer: Oospore
Q126. Hypertrophy symptoms in mustard are produced by________ disease.
- (a) White rust ✅
- (b) Alternaria blight
- (c) Powdery mildew
- (d) All above
Answer: White rust
Q127. Abnormal increase in the size of cells is termed as____.
- (a) Hypertrophy ✅
- (b) Hyperplasia
- (c) Hypoplastic
- (d) Hypoplasia
Answer: Hypertrophy
Q128. Increase in cell division leading increase in size of organ due to pathogenic reaction in the host is termed as______ .
- (a) Hypertrophy
- (b) Hyperplasia ✅
- (c) Hypoplastic
- (d) Hypoplasia
Answer: Hyperplasia
Q129. Hypertrophy symptoms in mustard are produced by________ disease.
- (a) Stem rot
- (b) Alternaria blight
- (c) Powdery mildew
- (d) Downy mildew ✅
Answer: Downy mildew
Q130. Alternaria blight in mustard is caused by________.
- (a) Alternaria solani
- (b) Alternaria alternata
- (c) Alternaria brassicae ✅
- (d) Alternaria porri
Answer: Alternaria brassicae
SESAMUM
Q131. Sesamum phyllody is caused by ________ :
- (a) Bacteria
- (b) Virus
- (c) Phytoplasma ✅
- (d) Fungi
Answer: Phytoplasma
Q132. Sesamum phyllody is transmitted by _____________.
- (a) Aphids
- (b) Thrips
- (c) Jassid ✅
- (d) Whitefly
Answer: Jassid
Q133. Floral parts of sesamum are transformed into leafy structure in _____.
- (a) Cercospora leaf spot
- (b) Powdery mildew
- (c) Sesamum phyllody ✅
- (d) Phytophthora blight
Answer: Sesamum phyllody
Q134. Sesamum phyllody is transmitted by _____________.
- (a) Aphis craccivora
- (b) Thrips tabaci
- (c) Bemisia tabaci
- (d) Orosius albicinctus ✅
Answer: Orosius albicinctus
Q135. Black coloured lesions on stem near collar region are produced in sesamum by_____.
- (a) Powdery mildew
- (b) Cercospora leaf spot
- (c) Sesamum phyllody
- (d) Phytophthora blight ✅
Answer: Phytophthora blight
Q136. Powdery mildew of sesamum is caused by______.
- (a) Erysiphe polygoni ✅
- (b) Erysiphe graminis
- (c) Erysiphe cichoracearum
- (d) Erysiphe graminis var. tritici
Answer: Erysiphe polygoni
SUNFLOWER
Q137. Sunflower rust is _________.
- (a) Autonomus rust
- (b) Autoecious rust ✅
- (c) Heteroecious rust
- (d) None of the above
Answer: Autoecious rust
Q138. Causal organism of sunflower rust is:
- (a) Puccinia helianthi ✅
- (b) Puccinia arachidis
- (c) Puccinia recondita
- (d) Puccinia striformis
Answer: Puccinia helianthi
Q139. Alternaria leaf spot in sunflower is caused by_______.
- (a) Alternaria carthami
- (b) Alternaria helianthi ✅
- (c) Alternaria brassicae
- (d) Alternaria sesami
Answer: Alternaria helianthi
COTTON
Q140. Alternaria leaf spot of cotton is caused due to _______:
- (a) Alternaria alternata
- (b) Alternaria macrospora ✅
- (c) Alternaria ricini
- (d) Alternaria solani
Answer: Alternaria macrospora
Q141. Pycnidial stage of Rhizoctonia balaticola causing root rot of cotton is ___.
- (a) Gomerclla tucumanensis
- (b) Macrophomina phaseolina ✅
- (c) Rhizoctonia solani
- (d) Fusarium solani
Answer: Macrophomina phaseolina
Q142. Grey mildew of cotton is caused by ___________.
- (a) Albugo candida
- (b) Erysiphe cichoracearum
- (c) Rumularia areola ✅
- (d) Ustilago nuda
Answer: Rumularia areola
Q143. Black arm is a common symptoms found in__________.
- (a) Bacterial leaf blight of rice
- (b) Blast of paddy
- (c) Angular leaf spot of cotton ✅
- (d) Grey mildew of cotton
Answer: Angular leaf spot of cotton
Q144. The wilt of cotton is :
- (a) Seed borne
- (b) Soil borne
- (c) Both a & b ✅
- (d) Air borne
Answer: Both a & b
Q145. Which fungal biocontrol agent is effective against soil borne plant pathogenic fungi?
- (a) Trichograma sp.
- (b) Trichoderma sp. ✅
- (c) Paecilomyces sp.
- (d) Sclerotium sp.
Answer: Trichoderma sp.
Q146. Angular leaf spot of cotton is caused by..
- (a) Fungi
- (b) Bacteria ✅
- (c) Virus
- (d) Nematode
Answer: Bacteria
Q147. Black arm of cotton is caused by ______.
- (a) Fusarium oxysporum f. sp. vasinfectum
- (b) Xanthomonas auxonopodis pv. malvacearum ✅
- (c) Rhizoctonia bataticola
- (d) Meloidogyne javanica
Answer: Xanthomonas auxonopodis pv. malvacearum
Q148. Rumularia areola is causing _________ disease in cotton.
- (a) Wilt
- (b) Powdery mildew
- (c) Root rot
- (d) Grey mildew ✅
Answer: Grey mildew
Q149. ________ soil is favourable for root rot disease in cotton.
- (a) Sandy soil ✅
- (b) Heavy black soil
- (c) Black soil
- (d) Light black soil
Answer: Sandy soil
Q150. ________ soil is favourable for wilt disease in cotton.
- (a) Sandy soil
- (b) Heavy black soil ✅
- (c) Clay soil
- (d) Sandy clay soil
Answer: Heavy black soil
Q151. Fusarium oxysporum is producing _________ resting spores.
- (a) Oospores
- (b) Cleistothecia
- (c) Chlamydospores ✅
- (d) Sclerotia
Answer: Chlamydospores
Q152. Rhizoctonia bataticola is producing _______ resting structure.
- (a) Chlamydospores
- (b) Cleistothecia
- (c) Oospores
- (d) Sclerotia ✅
Answer: Sclerotia
Q153. Bark shredding of infected roots occurs due to ______ disease in cotton.
- (a) Wilt
- (b) Grey mildew
- (c) Root rot ✅
- (d) Angular leaf spot
Answer: Root rot
Q154. In______ disease of cotton infection confined in vascular system.
- (a) Grey mildew
- (b) Root rot
- (c) Angular leaf spot
- (d) Wilt ✅
Answer: Wilt
SUGARCANE
Q155. Grassy shoot of sugarcane is transmitted by _______ aphid.
- (a) Longiunaguis sacchari
- (b) Melanapsis indosacchari
- (c) Aphis maidis
- (d) All of the above ✅
Answer: All of the above
Q156. The perfect stage of Colletotrichum falcatum infecting sugarcane red rot is ________.
- (a) Rhizoctonia bataticola
- (b) Colletotrichum gossypii
- (c) Glomerella tucumanensis ✅
- (d) Glomerella cingulata
Answer: Glomerella tucumanensis
Q157. Thermotherapy to setts before planting at 500C for 2 hrs is recommended for _________.
- (a) Sugarcane grassy shoot ✅
- (b) Sugarcane red rot
- (c) Sugarcane whip smut
- (d) All of the above
Answer: Sugarcane grassy shoot
Q158. Sugarcane mosaic virus is transmitted by _________.
- (a) Rhopalosiphum maidis
- (b) Myzus persicae
- (c) Bemisia tabaci
- (d) All of the above ✅
Answer: All of the above
Q159. Fruiting body produced by Colletotrichum falcatum is _______.
- (a) Pycnidium
- (b) Perithecium
- (c) Acervulus ✅
- (d) Apothecium
Answer: Acervulus
Q160. The whip smut of sugarcane is caused by ________ .
- (a) Ustilago hordei
- (b) Ustilago nuda
- (c) Ustilago scitaminea ✅
- (d) Ustilago maydis
Answer: Ustilago scitaminea
Q161. The pith of the red rot affected sugarcane stem emits ____ .
- (a) Alcoholic smell ✅
- (b) Fried egg like smell
- (c) Rotten fish like smell
- (d) No smell
Answer: Alcoholic smell
Q162. Grassy shoot disease of sugarcane is caused by________.
- (a) Fungi
- (b) Bacteria
- (c) Phytoplasma ✅
- (d) Nematode
Answer: Phytoplasma
Q163. Grassy shoot of sugarcane is transmitted by _________:
- (a) Mites
- (b) Aphids ✅
- (c) Thrips
- (d) Jassids
Answer: Aphids
Q164. Central shoot is replaced by a whip like structure in smut of __________.
- (a) Bajra
- (b) Rice
- (c) Sugarcane ✅
- (d) Maize
Answer: Sugarcane
Q165. Sugarcane crop appears dry and on splitting the cane shows white bands with red colour and emits sour odour. The disease is :
- (a) Red rot ✅
- (b) Wilt
- (c) Whip smut
- (d) Grassy shoot
Answer: Red rot
Q166. Sugarcane mosaic virus is transmitted by _________.
- (a) Aphids ✅
- (b) Thrips
- (c) Mites
- (d) Whitefly
Answer: Aphids
Q167. The red rot of sugarcane is caused by__________.
- (a) Colletotrichum graminicola
- (b) Colletotrichum capsici
- (c) Colletotrichum falcatum ✅
- (d) Colletotrichum lindemuthianum
Answer: Colletotrichum falcatum
Q168. The wilt of sugarcane is caused by__________.
- (a) Fusarium oxysporum
- (b) Fusarium moniliforme ✅
- (c) Fusarium udum
- (d) Fusarium cubense
Answer: Fusarium moniliforme
Q169. Ustilago scitaminea causes _________ disease in sugarcane.
- (a) Rust
- (b) Wilt
- (c) Smut ✅
- (d) Red rot
Answer: Smut
TOBACCO
Q170. Formation of giant cell is common line host-pathogen by____.
- (a) Virus
- (b) Root -knot nematode ✅
- (c) Fungi
- (d) mycoplasma
Answer: Root -knot nematode
Q171. Central Tobacco Research Institute is situated in ___________.
- (a) Anand
- (b) Assam
- (c) Rajmundri ✅
- (d) Akola
Answer: Rajmundri
Q172. Leaf curl of tobacco is transmitted by.
- (a) Thrips
- (b) Aphid
- (c) Whitefly ✅
- (d) All above
Answer: Whitefly
Q173. Leaf curl of tobacco is caused by________.
- (a) Nicotiana virus -1
- (b) Nicotiana virus -10 ✅
- (c) Phytoplasma
- (d) Viroid
Answer: Nicotiana virus -10
Q174. Frog-eye leaf spot disease is observed in _______.
- (a) Tobacco ✅
- (b) Cotton
- (c) Mustard
- (d) Sorghum
Answer: Tobacco
Q175. The first recognized virus disease of plants in the world of Plant Virology is _______.
- (a) Yellow vein mosaic
- (b) Tobacco mosaic ✅
- (c) Tobacco leaf curl
- (d) Cucumber mosaic
Answer: Tobacco mosaic
Q176. Carbofuran is used for the control of _________:
- (a) Fungi
- (b) Bacteria
- (c) Plant parasitic nematodes ✅
- (d) None of the above
Answer: Plant parasitic nematodes
Q177. Broom Rape/Orobanche infecting tobacco crop is a _______ :
- (a) Partial root parasite
- (b) Partial stem parasite
- (c) Complete root parasite ✅
- (d) Complete stem parasite
Answer: Complete root parasite
Q178. Which stage of root-knot larvae cause infection to host plant?
- (a) Second stage larvae ✅
- (b) Third stage larvae
- (c) Fourth stage larvae
- (d) Adult female
Answer: Second stage larvae
Q179. The sexually produced spores by Pythium spp. is known as ______ :
- (a) Zoospores
- (b) Arthrospores
- (c) Zygospores
- (d) Oospores ✅
Answer: Oospores
Q180. Root knot nematode favours the soil such as __________.
- (a) Clay and loamy soil
- (b) Black soil
- (c) Sandy soil ✅
- (d) Heavy black soil
Answer: Sandy soil
Q181. Soil solarization is recommended for the management of ___________.
- (a) Nematode ✅
- (b) Virus
- (c) Bacteria
- (d) Viroides
Answer: Nematode
Q182. Water soaked lesion with discolouration of stem at basal portion and infected seedling topples over soil is a common symptom in _________.
- (a) Tobacco damping off ✅
- (b) Sesamum phyllody
- (c) Bacterial leaf blight paddy
- (d) Paddy blast
Answer: Tobacco damping off
Q183. The leaf spot of tobacco having a white centre, surrounded by grey and brown portion and dark brown to black margin my be shot holes is due to:
- (a) Tobacco leaf curl
- (b) Tobacco mosaic
- (c) Tobacco frog eye leaf spot ✅
- (d) Tobacco damping off
Answer: Tobacco frog eye leaf spot
Q184. Root knotting in tobacco crop is caused by________.
- (a) Anguina tritici
- (b) Meloidogyne incognita ✅
- (c) Meloidogyne arenaria
- (d) Rotylenchus reniformis
Answer: Meloidogyne incognita
Q185. Complete root parasite of tobacco is ________.
- (a) Cuscuta
- (b) Striga
- (c) Loranthus
- (d) Orobanche ✅
Answer: Orobanche
Q186. Which fungus is associated with root knot infection?
- (a) Alternaria sp.
- (b) Fusarium sp. ✅
- (c) Helminthosporium sp.
- (d) Erysiphe sp.
Answer: Fusarium sp.
Q187. The term necrosis indicates….
- (a) Blightening
- (b) Curling
- (c) Death of cells ✅
- (d) Hypertrophy
Answer: Death of cells
Q188. Tobacco mosaic is caused by________.
- (a) Nicotiana virus -1 ✅
- (b) Nicotiana virus -10
- (c) Phytoplasma
- (d) Viroids
Answer: Nicotiana virus -1
Q189. Root knot nematode can be managed by…..
- (a) Carbendazim
- (b) Thirum
- (c) Carbofuran ✅
- (d) Mancozeb
Answer: Carbofuran
Q190. Rabbing with bajra/paddy husk @ 7kg/m2 is highly effective for_______.
- (a) Virus
- (b) Bacteria
- (c) Viroides
- (d) Nematodes ✅
Answer: Nematodes
Q191. Which fungal biocontrol agent is recommended for the control of root knot nematodes?
- (a) Trichoderma harzianum
- (b) Trichoderma hamatum
- (c) Aspergillus niger
- (d) Paecilomyces lilacinus ✅
Answer: Paecilomyces lilacinus
Q192. Brown leaf spot of tobacco is caused by________.
- (a) Alternaria alternata ✅
- (b) Alternaria burnsii
- (c) Alternaria solani
- (d) Alternaria brassicae
Answer: Alternaria alternata
Q193. Cercospora nicotianae causes ___ disease in tobacco crop.
- (a) Brown leaf spot
- (b) Root knotting
- (c) Damping off
- (d) Frog eye leaf spot ✅
Answer: Frog eye leaf spot
Q194. Alternaria alternata causes ______ disease in tobacco crop.
- (a) Brown leaf spot ✅
- (b) Root knotting
- (c) Damping off
- (d) Frog eye leaf spot
Answer: Brown leaf spot
Q195. Pythium aphanidermatum causes _________ disease in tobacco crop.
- (a) Brown leaf spot
- (b) Root knotting
- (c) Damping off ✅
- (d) Frog eye leaf spot
Answer: Damping off
Q196. Damping off of tobacco is caused by________.
- (a) Alternaria alternata
- (b) Cercospora nicotianae
- (c) Meloidogyne incognita
- (d) Pythium aphanidermatum ✅
Answer: Pythium aphanidermatum
Q197. Leaf curl of tobacco is transmitted by..
- (a) Thrips tabaci
- (b) Bemisia tabaci ✅
- (c) Aphis gossypii
- (d) Myzus persicae
Answer: Bemisia tabaci
TURMERIC
Q198. Rhizome rot pathogen of turmeric is transmitted to farthest distance by__ :
- (a) Air
- (b) Insects
- (c) Rhizome ✅
- (d) None of the above
Answer: Rhizome
Q199. Leaf blotch/brown leaf spot of turmeric is caused by ________.
- (a) Colletotrichum falcatum
- (b) Glomerella tucumanensis
- (c) Taphrina maculans ✅
- (d) Colletotrichum gloeosporioides
Answer: Taphrina maculans
Q200. Ca-69 is a resistant variety against _________.
- (a) Turmeric leaf blotch ✅
- (b) Wheat loose smut
- (c) Sugarcane red-rot
- (d) Blackgram anthracnose
Answer: Turmeric leaf blotch
Q201. Rhizome rot of turmeric is caused by________.
- (a) Pythium aphanidermatum
- (b) Pythium myriotylum
- (c) Pythium graminicolum
- (d) All above ✅
Answer: All above
Q202. Pythium aphanidermatum causes _________ disease in turmeric.
- (a) Leaf blotch
- (b) Rhizome rot ✅
- (c) Leaf spot
- (d) Powdery mildew
Answer: Rhizome rot
Q203. Taphrina maculans causes _________ disease in turmeric.
- (a) Leaf blotch ✅
- (b) Rhizome rot
- (c) Leaf spot
- (d) Downy mildew
Answer: Leaf blotch
Q204. Leaf spot of turmeric is caused by ________.
- (a) Colletotrichum capsici
- (b) Colletotrichum gloeosporioides
- (c) Colletotrichum curcumae
- (d) All above ✅
Answer: All above
Q205. Colletotrichum capsici causes _______ disease in turmeric.
- (a) Leaf blotch
- (b) Rhizome rot
- (c) Leaf spot ✅
- (d) Root knotting
Answer: Leaf spot
PULSES (Red gram, Green gram, Black gram, Bengal gram)
Q206. Which of the following disease of pigeonpea is caused by virus______?
- (a) Wilt
- (b) Stem canker
- (c) Sterility mosaic ✅
- (d) Leaf spot
Answer: Sterility mosaic
Q207. Pigeonpea sterility mosaic disease is transmitted by _______.
- (a) Aphids
- (b) Whitefly
- (c) Eriophyid mite ✅
- (d) Jassids
Answer: Eriophyid mite
Q208. Yellow mosaic virus of green gram is transmitted by ____________.
- (a) Aphis craccivora
- (b) Thrips tabaci
- (c) Orosius albicinctus
- (d) Bemisia tabaci ✅
Answer: Bemisia tabaci
Q209. Mungbean yellow mosaic virus is transmitted by ________:
- (a) Aphid
- (b) Leaf hoppers
- (c) Whitefly ✅
- (d) Thrips
Answer: Whitefly
Q210. ‘Mosaic’ is the specific symptoms produced by:
- (a) Phytoplasma
- (b) Fastidious vascular bacteria
- (c) Viroid
- (d) Virus ✅
Answer: Virus
Q211. 2000 ppm = _______ gm/litre of water.
- (a) 0.2 gm
- (b) 2 gm ✅
- (c) 20 gm
- (d) 200 gm
Answer: 2 gm
Q212. Leaf crinkle disease of black gram is transmitted by________.
- (a) White fly
- (b) Jassid
- (c) Aphid ✅
- (d) Thrips
Answer: Aphid
Q213. Black gram (Urdbean) anthracnose infected tissues produces necrotic areas with black dots. They are pathogenic part like ________.
- (a) Chlamydospore
- (b) Acervulus ✅
- (c) Cleistothecium
- (d) Zygospore
Answer: Acervulus
Q214. Leaf crinkle disease of black gram (Urdbean) is transmitted by ________.
- (a) Seed
- (b) Whitefly
- (c) Sap
- (d) All of the above ✅
Answer: All of the above
Q215. Powdery mildew pathogen is __________ in nature.
- (a) Obligate parasite ✅
- (b) Facultative parasite
- (c) Saprophyte
- (d) None of the above
Answer: Obligate parasite
Q216. Powdery mildew pathogen requires favourable condition as ___________.
- (a) Very high humidity
- (b) Low humidity ✅
- (c) Very low humidity
- (d) None of the above
Answer: Low humidity
Q217. Erysiphe polygoni produces__________ structure and perpetuate in infected plant debris.
- (a) Macroconidia
- (b) Zoospore
- (c) Cleistothecia ✅
- (d) Chlamydospores
Answer: Cleistothecia
Q218. Chickpea stunt disease is caused by _________.
- (a) Fungi
- (b) Bacteria
- (c) Virus ✅
- (d) Phytoplasma
Answer: Virus
Q219. Chick pea stunt disease is caused due to __________ .
- (a) Cucumber mosaic virus
- (b) Bean leaf roll virus ✅
- (c) Soybean mosaic virus
- (d) Yellow mosaic virus
Answer: Bean leaf roll virus
Q220. Chickpea blight is caused by ___________.
- (a) Pyricularia oryzae
- (b) Ascochyta rabiei ✅
- (c) Aspergillus flavus
- (d) Colletotrichum falcatum
Answer: Ascochyta rabiei
Q221. Development of numerous minute black pycnidia arranged in concentric rings are observed on stem and pods of chickpea is due to ___________.
- (a) Chickpea stunt
- (b) Chickpea wilt
- (c) Ascochyta blight of chickpea ✅
- (d) Powdery mildew of chickpea
Answer: Ascochyta blight of chickpea
Q222. Wilt of pigeonpea is caused by _______.
- (a) Fusarium udum ✅
- (b) Fusarium vasinfectum
- (c) Fusarium moniliforme
- (d) Fusarium gramineum
Answer: Fusarium udum
Q223. Stem blight/stem canker of pigeonpea is caused by _______.
- (a) Phytophthora infestans
- (b) Phytophthora drechsleri ✅
- (c) Phytophthora citrophthora
- (d) Phytophthora palmivora
Answer: Phytophthora drechsleri
Q224. Anthracnose of black gram (Urdbean) is caused by _______.
- (a) Colletotrichum capsici
- (b) Colletotrichum falcatum
- (c) Colletotrichum lindemuthianum ✅
- (d) Colletotrichum curcumae
Answer: Colletotrichum lindemuthianum
SOYBEAN
Q225. Soybean stem rot is caused by ________.
- (a) Fusarium oxysporum
- (b) Sclerotinia sclerotiorum ✅
- (c) Claviceps fusiformis
- (d) Rhizoctonia bataticola
Answer: Sclerotinia sclerotiorum
Q226. The vector infecting soybean mosaic can be controlled by the spray of _______.
- (a) Thiophanate methyl
- (b) Thiram
- (c) Streptocycline
- (d) Methyl -o-demeton ✅
Answer: Methyl -o-demeton
Q227. Phakopsora pachyrhizi fungus is causing rust disease in ________.
- (a) Bajra
- (b) Groundnut
- (c) Wheat
- (d) Soybean ✅
Answer: Soybean
Q228. Soybean rust is caused by _________.
- (a) Phakospora pachyrhizi ✅
- (b) Puccinia arachidis
- (c) Puccinia pennisetti
- (d) Puccinia graminis
Answer: Phakospora pachyrhizi
Q229. Soybean mosaic is transmitted by _________.
- (a) Aphids ✅
- (b) Jassids
- (c) White fly
- (d) Thrips
Answer: Aphids
RAGI
Q230. Blast in ragi is caused by________ .
- (a) Remularia areola
- (b) Pyricularia grisea ✅
- (c) Alternaria alternata
- (d) Claviceps fisiformis
Answer: Pyricularia grisea
JETROPHA
Diseases of Horticultural Crops And Their Management
Citrus
Q231. Mottle leaf of citrus is due to deficiency of:
- (a) Zinc ✅
- (b) Iron
- (c) Boron
- (d) Calcium
Answer: Zinc
Q232. Complete stem parasite of citrus is :
- (a) Cuscuta ✅
- (b) Striga
- (c) Orobanche
- (d) Loranthus
Answer: Cuscuta
Q233. Citrus gummosis is caused by:
- (a) Fusarium spp.
- (b) Pythium spp.
- (c) Phytophthora spp. ✅
- (d) Colletotricum spp.
Answer: Phytophthora spp.
Q234. Citrus gummosis pathogen survives in soil as
- (a) Oospore
- (b) Clamydospore ✅
- (c) Zoospore
- (d) Sclerotia
Answer: Clamydospore
Q235. Citrus canker is transmitted through the insect vector also:
- (a) Red mite
- (b) Leaf hopper
- (c) Leaf miner ✅
- (d) Thrips
Answer: Leaf miner
Q236. Secondary infection of citrus gummosis is through:
- (a) Oospore
- (b) Clamydospore
- (c) Zoospore ✅
- (d) Sclerotia
Answer: Zoospore
Q237. Citrus canker (lesions) is caused by:
- (a) Xanthomonas campestris pv. campestris
- (b) Xanthomonas campestris pv. oryzae
- (c) Xanthomonas campestris pv. citri. ✅
- (d) Xanthomonas campestris pv. punicae
Answer: Xanthomonas campestris pv. citri.
Q238. The gummosis disease of citrus can be identified by observing:
- (a) Death of shoot tip
- (b) Root knot
- (c) Chlorosis
- (d) Oozing of gum ✅
Answer: Oozing of gum
Q239. Vein flecking in young leaves and stem pitting on the tree bark is the characteristic symptom of
- (a) Citrus Gummosis
- (b) Citrus tristeza ✅
- (c) Citrus Canker
- (d) None of them
Answer: Citrus tristeza
Q240. Cross protection can be applied to manage:
- (a) Citrus Gummosis
- (b) Citrus tristeza ✅
- (c) Citrus Canker
- (d) None of them
Answer: Citrus tristeza
Q241. Formation of sharply delineated, dry, necrotic, localized, raised corky lesions on fruits, leaf, bark, etc. due to death of cambium is the characteristic feature of :
- (a) Citrus Canker ✅
- (b) Citrus Scab
- (c) Both
- (d) None
Answer: Citrus Canker
Q242. Total destruction of citrus orchards was done in Florida State of USA for the eradication of
- (a) Citrus Gummosis
- (b) Citrus tristeza
- (c) Citrus Canker ✅
- (d) None of them
Answer: Citrus Canker
Q243. Citrus tristeza is transmitted through
- (a) Toxoptera aurantii
- (b) Toxoptera citricida
- (c) Cuscuta reflexa
- (d) All the above ✅
Answer: All the above
Q244. Infected planting material/nursery stock of citrus can carry following pathogens
- (a) Xanthomonas campestris pv. citri.
- (b) Citrus tristeza virus
- (c) Both ✅
- (d) None
Answer: Both
Q245. Xanthomonas compestris pv. citri flagella type
- (a) Monotrichous ✅
- (b) Peritrichous
- (c) Atrichous
- (d) Amphitrichous
Answer: Monotrichous
Q246. Citrus greening caused by bacterium …………….
- (a) Xanthomona citri
- (b) Ca. Liberobacter asiaticum ✅
- (c) Erwinia amylora
- (d) Pseudomonas flouresence
Answer: Ca. Liberobacter asiaticum
Mango
Q247. Mango malformation is common in:
- (a) North-East India
- (b) South-East India
- (c) North-West India ✅
- (d) South-West India
Answer: North-West India
Q248. Partial stem parasite of mango is:
- (a) Cuscuta
- (b) Striga
- (c) Orobanche
- (d) Loranthus ✅
Answer: Loranthus
Q249. Mango malformation is caused by:
- (a) Alternaria solani
- (b) Fusarium moniliformae ✅
- (c) Meloidogyne incognita
- (d) Fusarium oxysporum
Answer: Fusarium moniliformae
Q250. Black tip of mango is also known as:
- (a) Chimney disease ✅
- (b) Soft nose
- (c) Witches broom
- (d) None of above
Answer: Chimney disease
Q251. Powdery mildew of mango is caused by:
- (a) Oidium mangiferae ✅
- (b) Colletotrichum gleosporiodes
- (c) Uncinulla nector
- (d) None of them
Answer: Oidium mangiferae
Q252. Oidium mangiferae survives during off-season as:
- (a) Cleistothecia in malformed panicles
- (b) Dormant mycelium in malformed panicles ✅
- (c) Both of them
- (d) None of them
Answer: Dormant mycelium in malformed panicles
Q253. Vector associated with the transmission of mango malformation is:
- (a) Aphid
- (b) White fly
- (c) Hopper
- (d) Mites ✅
Answer: Mites
Q254. Mango malformation causing pathogen survives as saprophytic mycelium and chlamydospores produced on ………..
- (a) Drying malformed panicles ✅
- (b) Infected Soil
- (c) Both
- (d) None
Answer: Drying malformed panicles
Q255. Dying back of twigs from tip downwards particularly in the older plants/trees is the characteristic symptoms of ………
- (a) Die-back ✅
- (b) Wilt
- (c) Leaf fall
- (d) Foot rot
Answer: Die-back
Q256. Anthracnose of mango is caused by …….
- (a) Glomerella cingulata ✅
- (b) Gibberella fujikoroi
- (c) Both of them
- (d) None of them
Answer: Glomerella cingulata
Q257. Which mango disease cause havoc at post-harvest loss…….
- (a) Mango Malformation
- (b) Powdery Mildew
- (c) Mango Anthracnose ✅
- (d) Mango Dieback
Answer: Mango Anthracnose
Q258. Spraying of NAA during blossoming stage is one of the major practice to manage
- (a) Mango Malformation ✅
- (b) Powdery Mildew
- (c) Mango Anthracnose
- (d) Mango Dieback
Answer: Mango Malformation
Q259. Colletotrichum gloeosporioides primarily survive in dried leaves, defoliated branches, mummified flowers, blighted peduncle, stem and disease twigs as
- (a) Acervuli ✅
- (b) Pycnia
- (c) Pycnidia
- (d) Sporodochia
Answer: Acervuli
Q260. Die back of mango is caused by
- (a) Glomerella cingulata
- (b) Gibberella fujikoroi
- (c) Botryodiplodia theobromae ✅
- (d) Dendrophthoe falcata
Answer: Botryodiplodia theobromae
Q261. Air borne conidia of Oidium mangiferae cause
- (a) Primary infection
- (b) Secondary Infection ✅
- (c) Primary & secondary infection
- (d) None of them
Answer: Secondary Infection
Q262. Major symptoms of mango malformation disease are ……………….
- (a) Bunchy top of seedlings
- (b) Vegetative malformation
- (c) Floral malformation
- (d) All the above ✅
Answer: All the above
Q263. Bacterial blight or cancker caused by ……………………
- (a) Erwinia spp.
- (b) Pseudomonas spp.
- (c) Xanthomonas campestris pv mangiferae-indica ✅
- (d) Agrobacterium spp.
Answer: Xanthomonas campestris pv mangiferae-indica
Q264. Powdery mildew caused by Oidium mangiferae is …………..
- (a) Ectophytic ✅
- (b) Endophytic
- (c) Semi endophytic
- (d) None of these
Answer: Ectophytic
Q265. Spraying of chelated Zn++ (40ppm) is useful in managing the disease …
- (a) Anthracnose
- (b) Malformation ✅
- (c) Powdery mildew
- (d) Sooty mold
Answer: Malformation
Ber
Q266. Powdery mildew of ber is caused by:…..
- (a) Oidium mangiferae
- (b) Oidium piperis
- (c) Oidium erysiphoides ✅
- (d) Oidium caricae
Answer: Oidium erysiphoides
Q267. Powdery mildew of ber can effectively be managed by spraying
- (a) Dinocap 0.1% ✅
- (b) Metalaxyl 0.1%
- (c) Both a and b
- (d) None of them
Answer: Dinocap 0.1%
Q268. Alteranaria leaf spot of ber is caused by
- (a) Alternaria alternata
- (b) Alternaria chartarum ✅
- (c) Alternaria solani
- (d) Alternaria raphi
Answer: Alternaria chartarum
Q269. Dusting with sulphur powder of which following mesh size is very effective to manage powdery mildew disease
- (a) 100 mesh size
- (b) 200 mesh size
- (c) 300 mesh size ✅
- (d) 400 mesh size
Answer: 300 mesh size
Q270. Powdery mildew caused by Oidium erysiphoides f. sp. zizyphi is …………..
- (a) Endophytic
- (b) Ectophytic ✅
- (c) Semi endophytic
- (d) None of these
Answer: Ectophytic
Banana
Q271. Panama wilt of banana is caused by
- (a) Mycosphaerella musicolla
- (b) Fusarium oxisporum ✅
- (c) Ralstonia solanacearum
- (d) Musa virus-1
Answer: Fusarium oxisporum
Q272. Panama wilt of banana is which type of disease…….
- (a) Simple interest ✅
- (b) Compound interest
- (c) Both A & B
- (d) None of above
Answer: Simple interest
Q273. Bunchy top disease of banana was introduced to India from :…..
- (a) Sri Lanka ✅
- (b) Europe
- (c) South Africa
- (d) Bangladesh
Answer: Sri Lanka
Q274. Most of the banana diseases are disseminated in new area through:
- (a) Soil
- (b) Suckers ✅
- (c) Air
- (d) Fruits
Answer: Suckers
Q275. Sigatoka disease of banana is caused by:
- (a) Alternaria alternata
- (b) Macrophomina phaseolina
- (c) Cercospora musae ✅
- (d) Colletotrichum sp.
Answer: Cercospora musae
Q276. Banana mosaic is primarily transmitted through:
- (a) Red bug
- (b) Suckers ✅
- (c) Plant debris
- (d) Animals
Answer: Suckers
Q277. Moko disease of banana is caused by:
- (a) Mycosphaerella musicolla
- (b) Fusarium oxysporum
- (c) Ralstonia solanacearum ✅
- (d) Musa virus-1
Answer: Ralstonia solanacearum
Q278. Bunchy top of banana virus is transmitted through :
- (a) Myzus persicae
- (b) Pentalonia nigronervosa ✅
- (c) Aphis gossypi
- (d) Bemisia tabaci
Answer: Pentalonia nigronervosa
Q279. Sigatoka disease of Banana is effectively managed by spraying of:
- (a) Water
- (b) Urea suspension
- (c) Mineral oil or linseed oil along with fungicides. ✅
- (d) None of them
Answer: Mineral oil or linseed oil along with fungicides.
Q280. Bunchy top of banana is spread by:
- (a) Pentalonia nigronervosa ✅
- (b) Bemisia tabacci
- (c) Lipaphis erysimi
- (d) Pollen
Answer: Pentalonia nigronervosa
Q281. The restricted movement of planting materials of banana from Gujarat and Maharashtra to other parts of the country is due to:
- (a) Banana bunchy top disease ✅
- (b) Panama wilt of banana
- (c) Moko wilt of banana
- (d) Banana mosaic disease
Answer: Banana bunchy top disease
Q282. Flood fallowing is an effective management practice of :
- (a) Panama wilt of banana ✅
- (b) Moko wilt of banana
- (c) Quick wilt of citrus
- (d) All the above
Answer: Panama wilt of banana
Q283. Fusarium wilt causing pathogen survives in soil as:
- (a) Cleistothecia
- (b) Perithecia
- (c) Chlamydospore ✅
- (d) Sclerotia
Answer: Chlamydospore
Q284. Domestic Quarantine has been imposed against which disease of banana
- (a) Banana bunchy top disease ✅
- (b) Panama wilt of banana
- (c) Moko wilt of banana
- (d) Banana mosaic disease
Answer: Banana bunchy top disease
Q285. Asexual fruiting body containing macro-micro conidia produced by Fusarium sp.
- (a) Acervuli
- (b) Pycnia
- (c) Pycnidia
- (d) Sporodochia ✅
Answer: Sporodochia
Q286. Primary infection of sigatoka leaf spot of banana takes place through
- (a) Ascospores ✅
- (b) Chalmydopsores
- (c) Basidiospores
- (d) Oospores
Answer: Ascospores
Q287. Acquisition of Banana bunchy top virus takes place through
- (a) Nymph ✅
- (b) Adult
- (c) Pupa
- (d) None of them
Answer: Nymph
Q288. Bioagents used in managing the panama wilt pathogen is …………..
- (a) Pseudomonas fluorescens
- (b) Trichoderma viride a
- (c) Both of above ✅
- (d) None of the above
Answer: Both of above
Q289. Banana bunchy top virus contains nucleus type ………….
- (a) ssRNA
- (b) ssDNA ✅
- (c) Both DNA and RNA
- (d) Only protein
Answer: ssDNA
Q290. Which race of Ralstonia solanacearum is infecting Musa sp.
- (a) Race 1
- (b) Race 2 ✅
- (c) Race 3
- (d) Race 4
Answer: Race 2
Grapevine
Q291. Discovery of Bordeaux mixture is associated with:
- (a) Downy mildew of ber
- (b) Downy mildew of cucurbits
- (c) Downy mildew of grapes ✅
- (d) Downy mildew of onion
Answer: Downy mildew of grapes
Q292. Bordeaux paste generally having copper sulphate in it:
- (a) 0.1%
- (b) 1% ✅
- (c) 5%
- (d) 10%
Answer: 1%
Q293. Which pathogen of grapes caused heavy losses to wine industry in France due to its epidemics in 1875:
- (a) Phytophthora infestans
- (b) Plasmopara viticola ✅
- (c) Helminthosporium oryzae
- (d) Uncinula necator
Answer: Plasmopara viticola
Q294. Powdery mildew disease of grapes is caused by:
- (a) Podosphaera leucotricha
- (b) Plasmopara viticola
- (c) Uncinula necator ✅
- (d) Leveillula taurica
Answer: Uncinula necator
Q295. Anthracnose disease of grape vine is also known as?
- (a) Pink disease
- (b) Leaf spot
- (c) Bird’s eye disease ✅
- (d) Chimney disease
Answer: Bird’s eye disease
Q296. In grapevine infected berries and bunches become mummified due to:
- (a) Powdery mildew
- (b) Fan leaf virus
- (c) Anthracnose
- (d) Downy mildew ✅
Answer: Downy mildew
Q297. Plasmopara viticola survives on the infected leaves and vines as
- (a) Oospore ✅
- (b) Dormant mycelium
- (c) Both
- (d) None of them
Answer: Oospore
Q298. ‘Malformation and Cracking of berries’ is the characteristic symptom of which disease of grape vine
- (a) Powdery mildew ✅
- (b) Fan leaf virus
- (c) Anthracnose
- (d) Downy mildew
Answer: Powdery mildew
Q299. Bird’s eye disease of grape vine is caused by
- (a) Gloeosporium ampelophagum ✅
- (b) Plasmopara viticola
- (c) Uncinula necator
- (d) Leveillula taurica
Answer: Gloeosporium ampelophagum
Q300. Sexual fruiting body produced by powdery mildew fungi
- (a) Cleistothecia ✅
- (b) perithecia
- (c) apothecia
- (d) Pseudothecia
Answer: Cleistothecia
Pomegranate
Q301. Slightly raised oily brown spots on pomegranate leaf and fruits are produced by:
- (a) Cercospora punicae
- (b) Xanthomonas punicae ✅
- (c) Alternaria alternate
- (d) Colletotrichum gloesporioides
Answer: Xanthomonas punicae
Q302. Bacterial leaf spot of Pomegranate caused by Xanthomonas campestris pv. punicae is effectively controlled by spraying with:
- (a) Vitavex
- (b) Pendimenthalin
- (c) Aureofungin
- (d) Streptocyclin ✅
Answer: Streptocyclin
Q303. Xanthomonas campestris pv. punicae can survive in
- (a) Infected plant part ✅
- (b) Soil,
- (c) Both
- (d) None of them
Answer: Infected plant part
Q304. Appreaence of small irregular black spots on pomegranate fruit is due to the infection of
- (a) Cercospora punicae ✅
- (b) Xanthomonas punicae
- (c) Both of them
- (d) None of them
Answer: Cercospora punicae
Q305. Fungicide effective to manage bacterial as well as fungal diseases of pomegranate
- (a) Bordeaux mixture
- (b) Copper oxychloride
- (c) copper hydroxide
- (d) All the above ✅
Answer: All the above
Papaya
Q306. Disintegration of parenchymatous tissues at the collar region of papaya stem resulting honeycomb appearance is characteristic symptoms of
- (a) Foot rot ✅
- (b) Fruit rot
- (c) Anthracnose
- (d) None of them
Answer: Foot rot
Q307. Pythium aphanidermatum can perpetuate in soil as
- (a) Oospore ✅
- (b) Sclerotia
- (c) Zoospores.
- (d) All the above
Answer: Oospore
Q308. Papaya ringspot virus can infect on:
- (a) Papaya
- (b) Cucurbits
- (c) Both of them ✅
- (d) None of them
Answer: Both of them
Q309. Cross protection can be applied to manage:
- (a) Citrus Gummosis
- (b) Papaya ringspot ✅
- (c) Papaya leaf curl
- (d) None of them
Answer: Papaya ringspot
Q310. Vein clearing, puckering, blistering and shoe stringing are the characteristic symptoms of which papaya disease?
- (a) Ring spot
- (b) Mosaic ✅
- (c) Leaf curl
- (d) Foot rot
Answer: Mosaic
Q311. Papaya leaf curl disease is caused by:
- (a) Tobacco leaf curl virus ✅
- (b) Tomato spotted wilt virus
- (c) Tobamo virus
- (d) Potyvirus
Answer: Tobacco leaf curl virus
Q312. Papaya leaf curl disease is transmitted through:
- (a) Aphids
- (b) Jassids
- (c) Thrips
- (d) White fly ✅
Answer: White fly
Q313. Papaya Ringspot disease is transmitted through:
- (a) Aphids ✅
- (b) Jassids
- (c) Thrips
- (d) White fly
Answer: Aphids
Q314. In leaf curl of papaya, cupping of leaves occurs in
- (a) Upward direction ✅
- (b) Downward direction
- (c) In both direction
- (d) None of them
Answer: Upward direction
Q315. Infection of Pythium sp. is prevalent in
- (a) Wet & moist weather ✅
- (b) Dry & hot weather
- (c) Both
- (d) None
Answer: Wet & moist weather
Q316. Foot rot of papaya caused by Rhizoctonia solani is severe in
- (a) Wet & moist weather
- (b) Dry & hot weather ✅
- (c) Both
- (d) None
Answer: Dry & hot weather
Guava
Q317. Stem canker of Guava is caused by:
- (a) Physelospora psidii ✅
- (b) Ramularia areola
- (c) Pseudoperenospora cubensis
- (d) Puccinia penisseti
Answer: Physelospora psidii
Q318. Which guava disease forming cracks and lesions along the stem:
- (a) Red rust
- (b) Wilt
- (c) Stem canker ✅
- (d) Root rot
Answer: Stem canker
Q319. Alternate host of guava rust pathogen is:
- (a) Paper bark
- (b) Bottle brush
- (c) Eucalypts
- (d) All of the below ✅
Answer: All of the below
Q320. Wilt of guava is caused by
- (a) Fusarium oxysporum f. sp. cubensis
- (b) Fusarium oxysporum f. sp. cumini
- (c) Fusarium oxysporum f. sp. psidii ✅
- (d) Fusarium oxysporum f. sp. javanica
Answer: Fusarium oxysporum f. sp. psidii
Q321. Soil solarization and soil drenching are the effective prophylactive measures to mange
- (a) Wilt ✅
- (b) Stem canker
- (c) Red rust
- (d) All the above
Answer: Wilt
Q322. Red rust of guava is caused by
- (a) Physelospora psidii
- (b) Cephaleuros virescens ✅
- (c) Puccinia penisseti
- (d) None of them
Answer: Cephaleuros virescens
Sapota
Q323. Leaf spot of sapota is caused by:
- (a) Phaeophleospora indica ✅
- (b) Helminthosporium indica
- (c) Phaeocercospora indica
- (d) Alternaria indica
Answer: Phaeophleospora indica
Q324. Minute black asexual fruiting bodies of Glomerella cingnlata produced on sapota fruit is
- (a) Acervulus ✅
- (b) Pycnidia
- (c) sporodocia
- (d) Synnemata
Answer: Acervulus
Q325. Leaf spot of sapota was first reported from
- (a) Andra Pradesh
- (b) Maharastra ✅
- (c) Karnataka
- (d) Gujarat
Answer: Maharastra
Q326. Flat limb of sapota is caused by
- (a) Phaeophleospora indica
- (b) Glomerella cingnlata
- (c) Botryodiplodia theobromae ✅
- (d) None of them
Answer: Botryodiplodia theobromae
Apple
Q327. Appearance of olive green or greyish brown to metallic black corky lesion on apple fruit is the characteristic symptom of:
- (a) Fire blight
- (b) Apple scab ✅
- (c) Powdery mildew
- (d) Twig blight
Answer: Apple scab
Q328. Spraying of urea on fallen leaves is an effective measure to manage:
- (a) Apple scab ✅
- (b) Citrus canker
- (c) Powdery mildew of ber
- (d) Sigatoka of banana
Answer: Apple scab
Q329. Erwinia amylovora is primarily transmitted through:
- (a) Honey bee
- (b) Ants
- (c) Water
- (d) All the above ✅
Answer: All the above
Q330. Apple scab pathogen overwinters on fallen leaves as
- (a) Apothecia
- (b) Cleistothecia
- (c) Pseudothecia ✅
- (d) All the above
Answer: Pseudothecia
Q331. For the first time who reported that plant disease (Fire blight of apple) caused by a bacterium ( Erwinia amylovora ) in 1882?
- (a) Robert Koch
- (b) E.F. Smith
- (c) Kohn
- (d) T. J. Burill ✅
Answer: T. J. Burill
Q332. Which of the following is not the disease of apple
- (a) Fire blight
- (b) Powdery mildew
- (c) Downy mildew ✅
- (d) Bunchy top
Answer: Downy mildew
Q333. Powdery mildew of apple is caused by:
- (a) Erysiphe polygoni
- (b) Podosphaera leucotricha ✅
- (c) Sphaerotheca fuligina
- (d) Uncinulla nector
Answer: Podosphaera leucotricha
Q334. Erwinia amylovora has flagella type …………………
- (a) Monotrichous
- (b) Peritrichous ✅
- (c) Atrichous
- (d) None of the above
Answer: Peritrichous
Q335. Against which disease of Apple, domestic quarantine has been imposed
- (a) Fire blight ✅
- (b) Powdery mildew
- (c) Apple scab
- (d) None of them
Answer: Fire blight
Coconut
Q336. Reddish brown oozing from the cracks of coconut tree trunk is the characteristic symptoms of:
- (a) Bud Rot
- (b) Stem bleeding ✅
- (c) Root wilt
- (d) Stem end rot
Answer: Stem bleeding
Q337. Bud rot pathogen of coconut Phytophthora palmivora produces which structure?
- (a) Sporangia
- (b) Oospore
- (c) Zoospore
- (d) All the above ✅
Answer: All the above
Q338. Wilt of coconut produces which spore?
- (a) Macro & Micro conidia ✅
- (b) Ascospore
- (c) Basidiospore
- (d) Arthrospore
Answer: Macro & Micro conidia
Q339. Red ring disease of coconut is caused by?
- (a) Rhadinaphelenchus cocophilus ✅
- (b) Meloidogyne javanica
- (c) Meloidogyne hapla
- (d) Heterodera avanae
Answer: Rhadinaphelenchus cocophilus
Q340. The responsible causal agent for stem bleeding in coconut is:
- (a) Botrydiplodia theobromae
- (b) Rhizoctonia solani
- (c) Ceratocystis paradoxa ✅
- (d) Phytophthora katsurae
Answer: Ceratocystis paradoxa
Q341. Ceratocystis paradoxa produces which spore?
- (a) Teliospore
- (b) Ascospore ✅
- (c) Basidiospore
- (d) None of the above
Answer: Ascospore
Q342. Rotting of basal tissues of the leaves that can be easily separated from the crown is the characteristic symptoms of
- (a) Bud Rot ✅
- (b) Stem bleeding
- (c) Root wilt
- (d) Stem end rot
Answer: Bud Rot
Q343. The actual aetiology of coconut root wilt is recently proved to be
- (a) Fungal aetiology
- (b) Bacterial aetiology
- (c) Phytoplasmal aetiology ✅
- (d) Viral aetiology
Answer: Phytoplasmal aetiology
Q344. The disease incidence of coconut bud rot is enhanced by
- (a) Rain splash
- (b) Wind
- (c) Oryctes rhinoceros
- (d) All the above ✅
Answer: All the above
Q345. Trunk injection and root feeding is the best method of applying fungicides in
- (a) Mango
- (b) Guava
- (c) Coffee
- (d) Coconut ✅
Answer: Coconut
Q346. Only viroid infecting monocot plant
- (a) Potato spindle tuber viroid
- (b) Avocado sun blotch viroid
- (c) Chrysanthemum stunt viroid
- (d) Coconut cadang-cadang viroid ✅
Answer: Coconut cadang-cadang viroid
Coffee
Q347. In which year coffee rust was first time reported?
- (a) 1989
- (b) 1947
- (c) 1968 ✅
- (d) 1962
Answer: 1968
Q348. Coffee rust was first reported from:
- (a) Java
- (b) Fiji
- (c) Ceylon ✅
- (d) Sumatra
Answer: Ceylon
Q349. Hemileia vastatrix causes which disease in coffee:
- (a) Twig rot
- (b) Black rot
- (c) Kolerago
- (d) Rust ✅
Answer: Rust
Q350. Coffee rust disease is caused by?
- (a) Hemileia vastatrix ✅
- (b) Puccinia recondite
- (c) Puccinia striformis
- (d) Puccinia helianthi
Answer: Hemileia vastatrix
Q351. Coffee black rot can effectively be managed by?
- (a) Streptocycline
- (b) Malathion
- (c) Bordeaux mixture ✅
- (d) None of above
Answer: Bordeaux mixture
Q352. Coffee rust pathogen survives and spreads through:
- (a) Pycnial stage
- (b) Aecial stage
- (c) Uredial stage ✅
- (d) Telial stage
Answer: Uredial stage
Q353. Term “Koleroga" means
- (a) White rot
- (b) Black rot ✅
- (c) Both
- (d) None
Answer: Black rot
Q354. “Koleroga" disease of coffee is caused by
- (a) Pellicularia koleroga
- (b) Corticium koleroga
- (c) Ceratobasidium noxium
- (d) All the above ✅
Answer: All the above
Q355. Which rust pathogen does not form the typical pustules on its host
- (a) Puccinia graminis tritici
- (b) Melampsora lini
- (c) Hemileia vastarix ✅
- (d) None of them
Answer: Hemileia vastarix
Tea
Q356. Blister blight of tea is caused by:
- (a) Cephaleuros mycoidea
- (b) Exobasidium vexans ✅
- (c) Diaporthe vexans
- (d) None of them
Answer: Exobasidium vexans
Q357. The disease caused by algae in tea is known as:
- (a) Brown rust
- (b) Red rust ✅
- (c) Yellow rust
- (d) Stem rust
Answer: Red rust
Q358. Red rust disease of tea and many fruit tree crops is caused by:
- (a) Nematode
- (b) Bacteria
- (c) Viroids
- (d) Algae ✅
Answer: Algae
Q359. Exobasidium vexans perpetuates on
- (a) Infected bushes. ✅
- (b) Soil
- (c) Crop debris
- (d) Seed
Answer: Infected bushes.
Q360. Appearance of yellowish white circular spots with concave surface on upper side and convex surface on the under-side of the tea leaves is the characteristic feature of
- (a) Blister blight ✅
- (b) Red rust
- (c) Leaf gall
- (d) Leaf rust
Answer: Blister blight
Q361. Appearance of yellowish to reddish-brown rough circular patches on the upper surface of leaves and green twigs
- (a) Blister blight
- (b) Red rust ✅
- (c) Leaf gall
- (d) Leaf rust
Answer: Red rust
Q362. Both primary and secondary infection of Exobasidium vexans takes place through
- (a) Oospores
- (b) Ascospores
- (c) Basidiospores ✅
- (d) Zygospores
Answer: Basidiospores
Cumin
Q363. Which stage is more susceptible to blight disease in cumin:
- (a) Fruiting
- (b) Flowering
- (c) a & b both ✅
- (d) None of the above
Answer: a & b both
Q364. Which variety of cumin is resistant against wilt?
- (a) Gujarat cumin- 1
- (b) Gujarat cumin-2
- (c) Gujarat cumin- 4 ✅
- (d) All the above
Answer: Gujarat cumin- 4
Q365. Cumin blight can effectively be managed by:
- (a) Iprodin ✅
- (b) Pendimenthalin
- (c) Tricyclazole
- (d) Butachlor
Answer: Iprodin
Q366. Alternaria burnsii perpetuates in infected debris:
- (a) Seed
- (b) Infected debris
- (c) a & b both ✅
- (d) None of the above
Answer: a & b both
Q367. Alternaria blight of cumin was first reported by
- (a) M.K. Patel
- (b) A.N. Mukhopadhyay
- (c) B. N. Uppal ✅
- (d) T.J. Thirumalachar
Answer: B. N. Uppal
Q368. Blight of cumin is caused by
- (a) Alternaria alternata
- (b) Alternaria burnsii ✅
- (c) Both of them
- (d) None of them
Answer: Alternaria burnsii
Q369. Powdery mildew of cumin is caused by
- (a) Erysiphe polygony ✅
- (b) Leveillula taurica
- (c) Uncinula necator
- (d) Erysiphe cumini
Answer: Erysiphe polygony
Q370. Wilt pathogen of cumin is mainly
- (a) Seed borne
- (b) Soil borne
- (c) Both of them ✅
- (d) Air borne
Answer: Both of them
Fennel
Q371. Collor rot disease of funnel is caused by:
- (a) Sclerotium rolfsii ✅
- (b) Taphrina muculans
- (c) Sclerotinia sclerotiorum
- (d) None of the above
Answer: Sclerotium rolfsii
Q372. Development of small ashy spots on the leaves and stem is the characteristic feature of
- (a) Powdery Mildew of Funnel
- (b) Downy Mildew of Funnel
- (c) Ramularia blight of Funnel ✅
- (d) All the above
Answer: Ramularia blight of Funnel
Q373. Blight of funnel is caused by
- (a) Alternaria alternata
- (b) Alternaria tenuis
- (c) Ramularia foeniculi ✅
- (d) All of them
Answer: Ramularia foeniculi
Q374. Powdery mildew of funnel is caused by
- (a) Erysiphe polygony
- (b) Leveillula taurica ✅
- (c) Uncinula necator
- (d) Ramularia foeniculi
Answer: Leveillula taurica
Coriander
Q375. Protomyces macrospores is causing which disease in coriander?
- (a) Powdery mildew
- (b) Stem gall ✅
- (c) Wilt
- (d) Downy mildew
Answer: Stem gall
Q376. Protomyces macrosporus can perpetuate as
- (a) Acervuli
- (b) Oospore
- (c) Chlamydospore ✅
- (d) Sclerotia
Answer: Chlamydospore
Q377. Formation of tumor-like swellings on leaf veins, leaf stalks, peduncles, stems as well as fruits are the characteristic feature of
- (a) Powdery mildew
- (b) Stem gall ✅
- (c) Wilt
- (d) Downy mildew
Answer: Stem gall
Q378. Fusarium oxysporum f.sp. coanderii can perpetuate in
- (a) seed
- (b) soil
- (c) crop debris
- (d) All the above ✅
Answer: All the above
Q379. Erysiphe polygoni is causing powdery mildew of
- (a) Cumin
- (b) Coriander
- (c) Both ✅
- (d) None of them
Answer: Both
Q380. Stem gall of coriander is a
- (a) Seed borne
- (b) Soil borne
- (c) both ✅
- (d) None of them
Answer: both
Q381. Fusarium oxysporum f.sp. coanderii can also persist in soil as
- (a) Acervuli
- (b) Oospore
- (c) Chlamydospore ✅
- (d) Sclerotia
Answer: Chlamydospore
Onion & Garlic
Q382. Purple Blotch of Onion & Garlic can be controlled by?
- (a) Seed treatment with thiram
- (b) Crop rotation with non-host crop
- (c) Spraying of mancozeb
- (d) All the above ✅
Answer: All the above
Q383. Garlic mosaic virus is transmitted by?
- (a) Aphid ✅
- (b) White fly
- (c) Mite
- (d) Hoppers
Answer: Aphid
Q384. Red scaled onion varieties are resistant to
- (a) Purple blotch
- (b) Downy Mildew
- (c) Smudge ✅
- (d) Smut
Answer: Smudge
Q385. Onion rust falls in the category of rust:
- (a) Autocious ✅
- (b) Heterocious
- (c) Herbacious
- (d) All above
Answer: Autocious
Q386. Colletotricum circinans causes which disease in onion:
- (a) Rust
- (b) Purple blotch
- (c) Rhizome rot
- (d) Smudge ✅
Answer: Smudge
Q387. Onion smudge disease is caused by:
- (a) Colletotrichum capsici
- (b) Colletotrichum gleosporioides
- (c) Colletotrichum circinans ✅
- (d) All the above
Answer: Colletotrichum circinans
Q388. Neck Rot of onion and garlic is caused by
- (a) Botrytis allii ✅
- (b) Sclerotium cepivorum
- (c) Fusarium oxysporum f.sp. cepae
- (d) Burkholderia cepacia
Answer: Botrytis allii
Q389. Purple blotch of onion is caused by
- (a) Alternaria alternata
- (b) Alternaria tenuis
- (c) Alternaria porri ✅
- (d) Alternaria solani
Answer: Alternaria porri
Q390. The red scaled onion varieties are disease resistant due to the presence of
- (a) Catechol & Protocatechuic acid ✅
- (b) Orcinol
- (c) Hircinol
- (d) None of them
Answer: Catechol & Protocatechuic acid
Cluster bean
Q391. Bacterial blight of cluster bean is caused by:
- (a) Xanthomonas campestris pv .cyamopsidis ✅
- (b) Xanthomonas campestris pv .citri
- (c) a & b both
- (d) None of above
Answer: Xanthomonas campestris pv .cyamopsidis
Q392. Bacterial blight of cluster bean was first reported by
- (a) BN Uppal
- (b) M.K.Patel
- (c) AN Mukhopadhyay
- (d) VT Patel ✅
Answer: VT Patel
Q393. Powdery mildew of cluster bean is caused by
- (a) Erysiphe polygoni
- (b) Erysiphe chicoracearum
- (c) Leveillula taurica ✅
- (d) None of them
Answer: Leveillula taurica
Q394. The mycelium of Leveillula taurica is
- (a) Ectophytic
- (b) Endophytic ✅
- (c) Paraphytic
- (d) None
Answer: Endophytic
Q395. Alternaria blight of cluster bean is caused by
- (a) Alternaria alternata
- (b) Alternaria burnsi
- (c) Alternaria cyamopsidis ✅
- (d) Alternaria tenuis
Answer: Alternaria cyamopsidis
Q396. Xanthomonas axonopodis pv . cyamopsidis is a………pathogen
- (a) Seed borne ✅
- (b) Soil borne
- (c) Both of them
- (d) None of them
Answer: Seed borne
Q397. Blackening of leaf veins or tracheobacteriosis in clusterbean is the characteristic feature of
- (a) Bacterial blight ✅
- (b) Powdery mildew
- (c) Anthracnose
- (d) Leaf spot
Answer: Bacterial blight
Q398. Bacterial blight of cluster bean can be managed by hot water treatment of seeds with hot water
- (a) at 500 C for 10 min
- (b) at 540 C for 60 min
- (c) at 560 C for 10 min ✅
- (d) at 560 C for 60 min
Answer: at 560 C for 10 min
Chilli
Q399. Acervuli formed by the fungus:
- (a) Fusarium
- (b) Pythium
- (c) Alternaria
- (d) Colletotricum ✅
Answer: Colletotricum
Q400. Chilli leaf curl is transmitted through:
- (a) Aphids
- (b) jassids
- (c) Whitefly ✅
- (d) Mites
Answer: Whitefly
Q401. Causal agent of chilli die back produces which structure?
- (a) Acervulus ✅
- (b) Pycnidia
- (c) Cleistothecium
- (d) Sclerotia
Answer: Acervulus
Q402. Dieback causes symptoms of necrosis in ………….. branches from tip backwards.
- (a) Older
- (b) Tender ✅
- (c) Both a and b
- (d) none
Answer: Tender
Q403. Chilli mosaic virus is transmitted by aphid in…………….. manner
- (a) persistent
- (b) non-persistent ✅
- (c) semipersistant
- (d) none
Answer: non-persistent
Q404. Appearance of dark, sunken ulcer like lesion with pink center on fruit is the characteristic feature of infection caused by
- (a) Fusarium solani
- (b) Sclerotinia sclerotiorum
- (c) Colletotrichum capsici ✅
- (d) Alternaria solani
Answer: Colletotrichum capsici
Q405. For soil solarization, ……..µm thick LLDPE (Low linear density )polyethylene is used
- (a) 1 µm
- (b) 20-25 µm ✅
- (c) 100 µm
- (d) 200 -250 µm
Answer: 20-25 µm
Q406. Chilli mosaic disease is caused by
- (a) Chilli mosaic virus
- (b) Tobacco Mosaic Virus
- (c) Cucumber Mosaic Virus
- (d) All the above ✅
Answer: All the above
Q407. Chilli leaf curl disease is caused by
- (a) Chilli leaf curl virus
- (b) Tobacco leaf curl virus
- (c) Both of them ✅
- (d) None of them
Answer: Both of them
Q408. Damping off of solanaceous crop is caused by
- (a) Pythium aphanidermatum ✅
- (b) P. debaryanum
- (c) Rhizoctonia solani
- (d)
Answer: Pythium aphanidermatum
Brinjal
Q409. Damping off disease of Brinjal is caused by:
- (a) Pythium aphanidermatum ✅
- (b) Alternaria solani
- (c) Phomopsis vexans
- (d) Verticillium lacuni
Answer: Pythium aphanidermatum
Q410. Which insect is transmitting little leaf of brinjal:
- (a) Aphid
- (b) Thrips
- (c) Jassid ✅
- (d) Mite
Answer: Jassid
Q411. Little leaf of brinjal is caused by:
- (a) Virus
- (b) Phytoplasma ✅
- (c) Viroids
- (d) Nematodes
Answer: Phytoplasma
Q412. Little leaf of Brinjal is transmitted by?
- (a) Hishimonis phycitis
- (b) Empoasca devastans
- (c) Emrasa bigutula bigutula
- (d) Both a & b ✅
Answer: Both a & b
Q413. In India, phomopsis blight of Brinjal was first time reported in which state?
- (a) Gujarat
- (b) Hariyana ✅
- (c) Andhra Pradesh
- (d) Maharashtra
Answer: Hariyana
Q414. _________ disease suppresses the production of flowers & fruits in brinjal.
- (a) vertcilium wilt
- (b) Phomopsis blight
- (c) Little leaf ✅
- (d) fruit rot
Answer: Little leaf
Q415. _______ pathogen is known to attack brinjal only & no collateral host as so far been recorded.
- (a) Sclerotium rolfssii
- (b) Phomopsis vexans ✅
- (c) Sclerotinia sclerotiorum
- (d) Alternaria spp.
Answer: Phomopsis vexans
Q416. Bacterial wilt of brinjal is caused by…………
- (a) Pseudomonas spp.
- (b) Erwinia amulovora
- (c) Xanthomonas spp.
- (d) Burkholderia solanacearum ✅
Answer: Burkholderia solanacearum
Q417. Which race(s) of Ralstonia solanacearum is infecting various solanacious crops?
- (a) Race 1
- (b) Race 2
- (c) Race 3
- (d) Race 1 & 3 both ✅
Answer: Race 1 & 3 both
Q418. Little leaf of brinjal can be managed by spraying
- (a) Streptocycline
- (b) Streptomycin
- (c) Aureofungin
- (d) Tetracycline ✅
Answer: Tetracycline
Bhendi
Q419. Yellow vein mosaic of okra is transmitted through:
- (a) Aphid
- (b) Thrips
- (c) Mites
- (d) Whitefly ✅
Answer: Whitefly
Q420. Yellow vein mosaic of okra is caused by:
- (a) Gemini virus ✅
- (b) Potyvirus
- (c) Potexvirus
- (d) Comovirus
Answer: Gemini virus
Q421. Root knot disease of okra can effectively be managed by:
- (a) Carbendazim
- (b) Carbofuran ✅
- (c) Thiram
- (d) Mancozeb
Answer: Carbofuran
Q422. Which viral disease is devastating in okra?
- (a) Yellow mosaic
- (b) Leaf curl
- (c) Little leaf
- (d) Yellow vein mosaic ✅
Answer: Yellow vein mosaic
Q423. Veinal clearing and veinal chlorosis of leaf is the chief symptom of the disease
- (a) Leaf curl of chilli
- (b) Tomato leaf curl
- (c) Tomato spotted wilt virus
- (d) Bhendi yellow vein mosaic ✅
Answer: Bhendi yellow vein mosaic
Q424. Bhendi Yellow Vein Mosaic Virus can survive in off season on
- (a) Althea rosea
- (b) Croton sparsiflorus
- (c) Hibiscus spp.
- (d) All the above ✅
Answer: All the above
Q425. Which stage of Meloidogyne incognita is infective
- (a) J1 Larvae
- (b) J2 Larvae ✅
- (c) J3 Larvae
- (d) J4 Larvae
Answer: J2 Larvae
Q426. Which pesticides is commonly used to manage root knot nematode
- (a) Carbendazim
- (b) Carbofuran ✅
- (c) Mancozeb
- (d) Sulpher
Answer: Carbofuran
Potato
Q427. Potato leaf roll virus transmitted through …………….
- (a) Myzus persicae ✅
- (b) Aphis gossypi
- (c) Pentalonia nigronervosa
- (d) Bemisia tabici
Answer: Myzus persicae
Q428. Commom scab of potato caused by ………….
- (a) Fungi
- (b) Bacteria
- (c) Actinomycetes ✅
- (d) Mycoplasma
Answer: Actinomycetes
Q429. Late blight of potato is associated with:
- (a) Bengal famine
- (b) Irish famine ✅
- (c) France famine
- (d) None
Answer: Irish famine
Q430. Late blight of potato was first introduced on hills in India.
- (a) Darjeeling hills
- (b) Arvalli hills
- (c) Himalayan hills
- (d) Nilgiri hills ✅
Answer: Nilgiri hills
Q431. Brown ring observed in the potato tuber due to :
- (a) Common scab
- (b) Bacterial wilt ✅
- (c) Black scurf
- (d) Late blight
Answer: Bacterial wilt
Q432. In 1845,the potato crop was destroyed in Ireland due to:
- (a) Phytopthora infestans ✅
- (b) Alternaria solani
- (c) Pythium aphanidermatum
- (d) Pseudomonas solanacerum
Answer: Phytopthora infestans
Q433. Common scab of potato can be controlled by reducing pH below 5.2 is caused by the pathogen:
- (a) Streptomyces scabies ✅
- (b) Streptomyces griseus
- (c) Streptomyces aureofaciens
- (d) Streptomyces flaveolus
Answer: Streptomyces scabies
Q434. Late blight of potato can be controlled by ………………..
- (a) Aldrin
- (b) BHC
- (c) Bordeaux mixture ✅
- (d) Streptocyclin
Answer: Bordeaux mixture
Q435. Black heart disease of Potato is occurred due to:
- (a) Low Oxygen ✅
- (b) High Nitrogen
- (c) High Phosphorus
- (d) None of the above
Answer: Low Oxygen
Q436. The term ‘ Phytophthora ’ means:
- (a) Plant destroyer ✅
- (b) Root rot
- (c) Phytonlike
- (d) Potato rot
Answer: Plant destroyer
Q437. Brown ring rot disease of potato is caused by?
- (a) Fungus
- (b) Bacteria ✅
- (c) Viruses
- (d) none
Answer: Bacteria
Q438. Black heart is a physiological disorder of
- (a) Tomato
- (b) Chilli
- (c) Potato ✅
- (d) bhendi
Answer: Potato
Q439. Source of primary infection for late blight of potato is
- (a) Infected tubers ✅
- (b) Crop debris
- (c) Air
- (d) Other host
Answer: Infected tubers
Q440. Common scab of potato can be managed by applying
- (a) Green manuring
- (b) Organic matters
- (c) Use of acidic fertilizers
- (d) All the above ✅
Answer: All the above
Q441. Seed plot technique is adopted to produce disease free seeds of potato for ……disease
- (a) Early blight
- (b) Late blight
- (c) Brown rot
- (d) Viral diseases ✅
Answer: Viral diseases
Q442. Source of primary infection for brown rot of potato is
- (a) Infected tubers
- (b) Infected soil
- (c) Both of them ✅
- (d) None of them
Answer: Both of them
Q443. Myzus persicae can transmit Potato Leaf Roll Virus (PLRV) in
- (a) Non persistent
- (b) Semi persistent
- (c) Persistent ✅
- (d) All of the above
Answer: Persistent
Q444. In potato leaf roll disease, tips and margin of leaves roll
- (a) Upwards direction ✅
- (b) Downwards direction
- (c) In Both direction
- (d) Remains flat
Answer: Upwards direction
Q445. Seed Treatment with 3% boric acid solution for 30 min is very effective to manage
- (a) Brown rot
- (b) Common scab ✅
- (c) Both
- (d) None of them
Answer: Common scab
Q446. Strict domestic quarantine has been imposed to prevent the spread of
- (a) Wart of potato
- (b) Golden cyst nematode of potato
- (c) Both of them ✅
- (d) None of them
Answer: Both of them
Cucurbits
Q447. Downy mildew disease of cucurbits is caused by:
- (a) Perenospora parasitica
- (b) Plasmopara viticola
- (c) Sclerospora graminicola
- (d) Pseudopernospora cubensis ✅
Answer: Pseudopernospora cubensis
Q448. Downy mildew first time recorded from …….. in 1898.
- (a) Cuba ✅
- (b) Srilanka
- (c) India
- (d) China
Answer: Cuba
Q449. Which fungicide should not be used for the control of Powdery mildew disease cucurbits?
- (a) Sulphur dust ✅
- (b) Thiophanet methyl
- (c) Morestan
- (d) Dinocap
Answer: Sulphur dust
Q450. Mosaic disease of cucurbits is transmitted through:
- (a) Myzus persicae
- (b) Aphis gossypii
- (c) Pantalonia nigronervosa
- (d) Both a & b ✅
Answer: Both a & b
Q451. Powdery mildew can be effectively controlled by …………..
- (a) Mancozeb
- (b) carbendazim
- (c) Wettable sulphur ✅
- (d) difenconazole
Answer: Wettable sulphur
Q452. Cucumber mosaic disease caused by ……….
- (a) Cucumber mosaic virus - 1 ✅
- (b) Cucumis virus- 10
- (c) Cv-1
- (d) Cv-5
Answer: Cucumber mosaic virus - 1
Q453. Powdery mildew of cucurbits caused by
- (a) Erysiphae cichoracearum
- (b) Sphaerotheca fuliginea
- (c) Both a and b ✅
- (d) none
Answer: Both a and b
Q454. Cucumber mosaic disease is transmitted by
- (a) Mechanically
- (b) Infected seed
- (c) Insect-vector
- (d) All the above ✅
Answer: All the above
Tomato
Q455. Leaf curl of tomato is spread by:
- (a) Jassid
- (b) Whitefly ✅
- (c) Aphid
- (d) Nematode
Answer: Whitefly
Q456. Wilt disease of tomato is caused by:
- (a) Fusarium moniliforme
- (b) Fusarium udum
- (c) Fusarium oxysporum f.sp . lycopersici ✅
- (d) Fusarium oxysporum & sp. Ricini
Answer: Fusarium oxysporum f.sp . lycopersici
Q457. Powdery mildew is caused by
- (a) Levillula taurica ✅
- (b) Erysiphae spp.
- (c) Podopshora spp.
- (d)
Answer: Levillula taurica
Q458. Tomato Spotted Wilt Virus is transmitted by -----------------
- (a) Thrips ✅
- (b) Leafhopper
- (c) whitefly
- (d) Aphids
Answer: Thrips
Q459. Tomato leaf curl can be controlled by spraying …………….
- (a) Mancozeb
- (b) Triazophos ✅
- (c) Ridomil MZ
- (d) Tricyclazole
Answer: Triazophos
Q460. Ralstonia solanacearum causes
- (a) Wilting of tomato ✅
- (b) Bunchy top of Tomato
- (c) Leaf curl of tomato
- (d) Early blight of tomato
Answer: Wilting of tomato
Q461. Covering tomato nursery with nylon net is followed for the control of ………
- (a) Bacterial wilt of tomato
- (b) Tomato leaf curl ✅
- (c) Tomato root knot
- (d) Early blight of tomato
Answer: Tomato leaf curl
Q462. Pasteuria penetrans is used as a biocontrol agent for
- (a) bacteria
- (b) Fungus
- (c) nematodes ✅
- (d) None
Answer: nematodes
Q463. Early blight of potato and tomato caused by
- (a) Alternaria solani ✅
- (b) Alternaria alternata
- (c) Alternaria helianthi
- (d) Alternaria tenuis
Answer: Alternaria solani
Q464. Alternaria solani can infect
- (a) Capsicum annum
- (b) Lycopersicon esculentum
- (c) Solanum tuberosum
- (d) All the above ✅
Answer: All the above
Q465. Enations, i.e., leafy out growths on the under surface of the leaves is the characteristic feature of
- (a) Leaf curling of tomato ✅
- (b) Leaf vein clearing of okra
- (c) Leaf rolling of patato
- (d) Wilting of brinjal
Answer: Leaf curling of tomato
Q466. Appearance of circular to angular, dark brown to black spots with characteristic concentric ring is the characteristic feature of
- (a) Bacterial wilt of tomato
- (b) Late blight of tomato
- (c) Tomato root knot
- (d) Early blight of tomato ✅
Answer: Early blight of tomato
Beans
Q467. Anthracnose of beans is caused by
- (a) Colletotrichum graminicola
- (b) Colletotrichum falcatum
- (c) Colletotrichum lindemuthianum ✅
- (d) Colletotrichum gloeosporoides
Answer: Colletotrichum lindemuthianum
Q468. Colletotrichum lindemuthianum can perpetuate in
- (a) Infected seeds
- (b) Infected plant debris
- (c) Both of them ✅
- (d) None of them
Answer: Both of them
Q469. Powdery mildew of bean is caused by
- (a) Erysiphe polygoni
- (b) Leveillula taurica
- (c) Both of them ✅
- (d) None of them
Answer: Both of them
Marigold
Rose
Q470. Diplodia rosarum causes which disease in rose?
- (a) Rust
- (b) Powdery mildew
- (c) Wilt
- (d) Die back ✅
Answer: Die back
Q471. Black spot of Rose is caused by
- (a) Cercospora sp
- (b) Alternaria sp
- (c) Diplocarpon sp ✅
- (d) Colletotrichum sp.
Answer: Diplocarpon sp
Q472. Drying of twigs from tip to down wards in rose is caused by:
- (a) Phytophthora palmivora
- (b) Sphaerotheca pannosa
- (c) Leveillula taurica
- (d) Diplodia rosarum ✅
Answer: Diplodia rosarum
Q473. Diplodia rosarum persists in dead twigs and the stalks of the withered branches in the form of
- (a) Acervuli
- (b) Pycnia
- (c) Pycnidia ✅
- (d) Sporodochia
Answer: Pycnidia
Q474. Powdery mildew of rose is caused by
- (a) Erysiphe polygoni
- (b) Leveillula taurica
- (c) Podosphaera leucotricha
- (d) Podosphaera pannosa ✅
Answer: Podosphaera pannosa
Chrysanthemum
Q475. Leaf blotch of Chrysanthemum is caused by:
- (a) Chrysanthemum stunt viroid
- (b) Septoria crysenthemella ✅
- (c) Fusarium spp.
- (d) Meloidogyne javanica
Answer: Septoria crysenthemella
Q476. Which one is a foliar pathogen
- (a) Macrophomina sp.
- (b) Septoria sp. ✅
- (c) Fusarium spp.
- (d) Meloidogyne javanica
Answer: Septoria sp.
Q477. Septoria crysenthemella survive in the infected debris and soil as
- (a) Acervuli
- (b) Pycnia
- (c) Pycnidia ✅
- (d) Sporodochia
Answer: Pycnidia
Q478. Stunting of chrysanthemum is caused by
- (a) Virus
- (b) Viroid ✅
- (c) Phytoplasma
- (d) Fungi
Answer: Viroid
Introductory Plant Pathology
Introduction of Plant Pathology
Q479. Irish famine (1845) was associated with…….
- (a) Brown leaf spot of paddy
- (b) Late blight of tomato
- (c) Late blight of potato ✅
- (d) Early blight of potato
Answer: Late blight of potato
Q480. Bengal famine(1942) was associated with…….
- (a) Late blight of potato
- (b) Brown leaf spot of paddy ✅
- (c) Bacterial blight of rice
- (d) Blast of rice
Answer: Brown leaf spot of paddy
Q481. Aspergillus flavus produce toxin is …..
- (a) Fumotoxin
- (b) Aflatoxin ✅
- (c) Ergotoxin
- (d) Tabtoxin
Answer: Aflatoxin
Q482. Ergotin produced by …
- (a) Aspergillus niger
- (b) Aspergillus flavus
- (c) Claviceps purpurea ✅
- (d) Fusarium moniliforme
Answer: Claviceps purpurea
Q483. Late blight of potato was associated with ….
- (a) Bengal famine
- (b) Irish famine ✅
- (c) Russian famine
- (d) British famine
Answer: Irish famine
Q484. The area under coffee has been occupied by tea in Ceylon due to …….. disease.
- (a) Rust ✅
- (b) Blister blight
- (c) Smut
- (d) Downy mildew
Answer: Rust
History of Plant Pathology
Q485. The Founder and Father of Mycology is......
- (a) P.M.A.Millardet
- (b) P.A.Micheli ✅
- (c) E.J.Butler
- (d) Anton de Bary
Answer: P.A.Micheli
Q486. Bordeaux mixture discovered by…
- (a) P.A.Micheli
- (b) P. M. A. Millardet ✅
- (c) N. A. Cobb
- (d) K. C. Mehta
Answer: P. M. A. Millardet
Q487. Father of Plant Pathology in India is......
- (a) K.C.Mehta
- (b) N.A.cobb
- (c) E.J.Butler ✅
- (d) Anton de Bary
Answer: E.J.Butler
Q488. First plant parasitic nematode (Ear cockle of wheat) was reported by......
- (a) N.A.Cobb
- (b) T.Needham ✅
- (c) E.J.Butler
- (d) C.H.Persoon
Answer: T.Needham
Q489. Father of modern Plant Pathology....
- (a) Anton de Bary ✅
- (b) M.K.Patel
- (c) E.J.Butler
- (d) P.A.Micheli
Answer: Anton de Bary
Q490. Father of American Nematology…..
- (a) T.Needham
- (b) N.A.Cobb ✅
- (c) E.J.Butler
- (d) P.A.Micheli
Answer: N.A.Cobb
Q491. Heteroecious nature of rust fungi was discovered by ....
- (a) Anton de Bary ✅
- (b) M.K.Patel
- (c) E.J.Butler
- (d) P.A.Micheli
Answer: Anton de Bary
Q492. Solar heat treatment method for the control of loose smut of wheat was given by
- (a) M.K.Patel
- (b) K.C.Mehta
- (c) J.C.Luthra ✅
- (d) Flor
Answer: J.C.Luthra
Q493. Theory of pasteurization was discovered by….
- (a) E.F.Smith
- (b) T.J.Burril
- (c) Robert Koch
- (d) Louis Pasteur ✅
Answer: Louis Pasteur
Q494. The Father of Microbiology is….
- (a) Robert Koch
- (b) T.J.Burrill
- (c) Anton Van Leewenhock ✅
- (d) Stakman
Answer: Anton Van Leewenhock
Q495. Tobacco mosaic virus disease was first reported by
- (a) Adolf Mayer ✅
- (b) Louis Pasture
- (c) F.C.Badwan
- (d) E.C.Stakman
Answer: Adolf Mayer
Q496. Who got noble prize for pure crystalline form of TMV
- (a) Bawden
- (b) T.J.Burril
- (c) W.M.Stanley ✅
- (d) M.W.Beijerink
Answer: W.M.Stanley
Q497. Who recorded wheat bunt disease and proved its contagious nature…..
- (a) Tillet ✅
- (b) C.H.Persoon
- (c) Prevost
- (d) Ward
Answer: Tillet
Q498. Name the Indian scientist who worked on black stem rust of wheat
- (a) M.K.Patel
- (b) R.Prasad
- (c) K.C.Mehta ✅
- (d) J.C.Luthra
Answer: K.C.Mehta
Q499. Who discovered sexuality in fungi…..
- (a) Blackslee ✅
- (b) J.C.Walker
- (c) E.C.Stakman
- (d) Buller
Answer: Blackslee
Q500. Who discovered physiological races of pathogen
- (a) E.C.Stakman ✅
- (b) Sadasivan T.S.
- (c) J.G.Kuhn
- (d) Oroton
Answer: E.C.Stakman
Q501. Polymorphism nature in fungi was discovered by..
- (a) K.C.Mehta
- (b) Anton de Bary
- (c) P.A.Micheli
- (d) Tulasne Brothers ✅
Answer: Tulasne Brothers
Q502. Who worked on breeding for disease resistance
- (a) Ward
- (b) Woronin
- (c) W.M.Stanley
- (d) J.C.Walker ✅
Answer: J.C.Walker
Q503. Gene for gene hypothesis theory was given by
- (a) Flor ✅
- (b) Oroton
- (c) J.C.Walker
- (d) Biffen
Answer: Flor
Q504. Which antibiotic was first time discovered by Fleming in 1929
- (a) Streptomycin
- (b) Penicillin ✅
- (c) Tetracycline
- (d) Gliotoxin
Answer: Penicillin
Q505. Five kingdom system of classification was given by
- (a) Whittakar ✅
- (b) Haeckle
- (c) E.J.Butler
- (d) T.Needham
Answer: Whittakar
Q506. “ Nova Plantarum Genera ” published by
- (a) P.M.A.Millardet
- (b) C.H.persoon
- (c) P.A.Micheli ✅
- (d) Tulasne Brothers
Answer: P.A.Micheli
Q507. “ Synopsis methodica fungorum” published by
- (a) P.M.A.Millardet
- (b) C.H.Persoon ✅
- (c) P.A.Micheli
- (d) Tulasne Brothers
Answer: C.H.Persoon
Q508. “ Slecta Fungorum Carpologia” published by
- (a) P.M.A.Millardet
- (b) C.H.persoon
- (c) P.A.Micheli
- (d) Tulasne Brothers ✅
Answer: Tulasne Brothers
Q509. "Who started Indian Phytopathological Society ,New Delhi ?"
- (a) E.J.Butler
- (b) B.B.Munkur ✅
- (c) M.K.Patel
- (d) K.C.Mehta
Answer: B.B.Munkur
Q510. Pathogen which requires two different hosts to complete its life cycle is called
- (a) Autoecious
- (b) Heteroecious ✅
- (c) Polycyclic
- (d) Monoecious
Answer: Heteroecious
Q511. A fungal pathogen(particularly rust fungi) which completes its entire life cycle on the same host is called …
- (a) Autoecious ✅
- (b) Heteroecious
- (c) Polycyclic
- (d) Monocyclic
Answer: Autoecious
Q512. A Book “Fungi and Plant Disease” was written by…
- (a) E.J.Butler ✅
- (b) E.C.Stakman
- (c) B.B.Mundkur
- (d) Oskar Brefeld
Answer: E.J.Butler
Q513. Alternate host of stem rust of wheat is .....
- (a) Bajra
- (b) Brinjal
- (c) Barley
- (d) Barberry ✅
Answer: Barberry
Q514. Binomial system of nomenclature was given by….
- (a) Linnaeus ✅
- (b) Robert Hook
- (c) Anton Van Leewenhock
- (d) Aristotle
Answer: Linnaeus
Q515. Pathogenic nature of fungi was discovered by…..
- (a) Tillet
- (b) P.A.Micheli
- (c) Prevost ✅
- (d) Woronnin
Answer: Prevost
Q516. Pure culture technique of fungi developed by….
- (a) J.G.Kuhn
- (b) Brefeld ✅
- (c) Prevost
- (d) Ward
Answer: Brefeld
Terminology and Different Micro-organisms
Q517. An agent causing disease in host tissues is….
- (a) Pathogen ✅
- (b) Disease
- (c) Saprophyte
- (d) Parasite
Answer: Pathogen
Q518. A plant that is invaded by parasite and from which parasite obtain nutrition is known as...
- (a) Host ✅
- (b) Disorder
- (c) Disease
- (d) Pathogen
Answer: Host
Q519. Any agent that depends on other for survival is called....
- (a) Disease
- (b) Disorder
- (c) Host
- (d) Parasite ✅
Answer: Parasite
Q520. Fungi living on only living host is known as ….
- (a) Obligate parasite ✅
- (b) Facultative parasite
- (c) Saprophyte
- (d) Perthotrophs
Answer: Obligate parasite
Q521. An organism that uses dead organic material for food is known as…
- (a) Biotrop
- (b) Saprophyte ✅
- (c) Obligate parasite
- (d) Parasite
Answer: Saprophyte
Q522. Majority of fungi are ….
- (a) Obligate parasite
- (b) Facultative parasite
- (c) Saprophyte ✅
- (d) Facultative saprophyte
Answer: Saprophyte
Q523. A pathogen mainly parasitic on a plant may become saprophyte under certain conditions for some times is called …..
- (a) Obligate parasites
- (b) Obligate saprophytes:
- (c) Facultative saprophytes ✅
- (d) Facultative parasites
Answer: Facultative saprophytes
Q524. A pathogen mainly saprophyte on a dead organic matter may become parasitic when suitable hosts become available under certain conditions for some times are called …..
- (a) Obligate parasites
- (b) Obligate saprophytes
- (c) Facultative saprophytes
- (d) Facultative parasites ✅
Answer: Facultative parasites
Q525. Eukaryotic micro-organism is…
- (a) Phytoplasma
- (b) Fungi ✅
- (c) Bacteria
- (d) Virus
Answer: Fungi
Q526. Prokaryotic organism is..
- (a) Bacteria ✅
- (b) Fungi
- (c) Algae
- (d) Nematode
Answer: Bacteria
Q527. Unicellular microorganism is..
- (a) Yeast ✅
- (b) Rhizopus
- (c) Penicillium
- (d) Mucor
Answer: Yeast
Q528. Which organism does not have cell wall?
- (a) Bacteria
- (b) Yeast
- (c) Phytoplasma ✅
- (d) Fungi
Answer: Phytoplasma
Q529. Viruses are…
- (a) Obligate parasites ✅
- (b) Obligate saprophytes
- (c) Facultative parasites
- (d) All of them
Answer: Obligate parasites
Q530. An organism contain naked RNA…
- (a) Bacteria
- (b) Viroids ✅
- (c) Fungi
- (d) Virus
Answer: Viroids
Q531. Tobacco mosaic is caused by…
- (a) Bacteria
- (b) Virus ✅
- (c) Algae
- (d) Fungi
Answer: Virus
Q532. Tobacco leaf curl disease is caused by…
- (a) Bacteria
- (b) Virus ✅
- (c) Algae
- (d) Fungi
Answer: Virus
Q533. Yellow vein mosaic of okra disease is caused by…
- (a) Bacteria
- (b) Virus ✅
- (c) Algae
- (d) Fungi
Answer: Virus
Q534. Papaya leaf curl disease is caused by…
- (a) Bacteria
- (b) Virus ✅
- (c) Algae
- (d) Fungi
Answer: Virus
Q535. A virus particle is known as ……
- (a) Virion ✅
- (b) Capsomer
- (c) Viroids
- (d) Capsid
Answer: Virion
Q536. Root - knot disease of vegetable crops is caused by ...
- (a) Nematode ✅
- (b) Fungi
- (c) Algae
- (d) Protozoa
Answer: Nematode
Q537. Potato spindle tuber disease is caused by…
- (a) Nematode
- (b) Fungi
- (c) Virus
- (d) Viroids ✅
Answer: Viroids
Q538. Citrus canker disease is caused by...
- (a) Virus
- (b) Fungi
- (c) Phytoplasma
- (d) Bacteria ✅
Answer: Bacteria
Q539. Angular leaf spot of cotton is caused by …
- (a) Virus
- (b) Fungi
- (c) Phytoplasma
- (d) Bacteria ✅
Answer: Bacteria
Q540. Sesamum phyllody is caused by…
- (a) Phytoplasma ✅
- (b) Virus
- (c) Bacteria
- (d) Fungi
Answer: Phytoplasma
Q541. Little leaf of brinjal is caused by…
- (a) Phytoplasma ✅
- (b) Virus
- (c) Bacteria
- (d) Fungi
Answer: Phytoplasma
Q542. Grassy shoot of sugarcane is caused by …
- (a) Virus
- (b) Fungi
- (c) Phytoplasma ✅
- (d) Bacteria
Answer: Phytoplasma
Q543. Red rust disease of mango is caused by
- (a) Nematode
- (b) Virus
- (c) Algae ✅
- (d) Fungi
Answer: Algae
Q544. Mottle leaf of citrus disease is due to the deficiency of
- (a) Boron
- (b) Iron
- (c) Zinc ✅
- (d) Calcium
Answer: Zinc
Q545. Chlorosis of groundnut disease is due to the deficiency of
- (a) Boron
- (b) Iron ✅
- (c) Zinc
- (d) Calcium
Answer: Iron
Q546. Khaira disease of rice is due to the deficiency of
- (a) Boron
- (b) Iron
- (c) Zinc ✅
- (d) Calcium
Answer: Zinc
Q547. Zinc deficiency causes disease in rice is known as
- (a) Chlorosis
- (b) Mottle leaf
- (c) Khaira ✅
- (d) Necrosis
Answer: Khaira
Q548. Zinc deficiency causes disease in citrus is known as
- (a) Chlorosis
- (b) Mottle leaf ✅
- (c) Khaira
- (d) Necrosis
Answer: Mottle leaf
Q549. Which of the following is complete stem parasitic phanerogamic plant
- (a) Orobanche
- (b) Striga
- (c) Dodder ✅
- (d) Loranthus
Answer: Dodder
Q550. Which of the following is partial stem parasitic phanerogamic plant
- (a) Orobanche
- (b) Striga
- (c) Dodder
- (d) Loranthus ✅
Answer: Loranthus
Q551. Which of the following is complete root parasitic phanerogamic plant
- (a) Orobanche ✅
- (b) Striga
- (c) Dodder
- (d) Loranthus
Answer: Orobanche
Q552. Which of the following is partial root parasitic phanerogamic plant
- (a) Orobanche
- (b) Striga ✅
- (c) Dodder
- (d) Loranthus
Answer: Striga
Q553. Soil temperature /Soil moisture is a..
- (a) Abiotic factor ✅
- (b) Mesobiotic factor
- (c) Biotic factor
- (d) All of them
Answer: Abiotic factor
Q554. Diseases caused by algae in plants is a..
- (a) Abiotic factor
- (b) Mesobiotic factor
- (c) Biotic factor ✅
- (d) All of them
Answer: Biotic factor
Q555. Atmospheric impurities or Toxic substance cause disease in mango fruits due to sulphur dioxide gas near Brick kihn is.
- (a) Necrosis ✅
- (b) Anhtracnose
- (c) Chlorosis
- (d) Stem end rot
Answer: Necrosis
Q556. Common scab of potato is favoured by …….. pH of soil.
- (a) Acidic
- (b) Alkaline ✅
- (c) Both a and b
- (d) Neutral
Answer: Alkaline
Q557. The science which deals with the study of flowering plant parasite is known as .
- (a) Phanerology ✅
- (b) Mycology
- (c) Horticulture
- (d) Plant Pathology
Answer: Phanerology
Fungi – Importance, Somatic Structures, Reproduction
Q558. Fungi is a …
- (a) Eukaryotic
- (b) Achlorophyllus
- (c) Heterotrophic
- (d) All of them ✅
Answer: All of them
Q559. Which fungus is used as bio-control agent against soil borne diseases
- (a) Fusarium
- (b) Alternaria
- (c) Trichoderma ✅
- (d) Penicillium
Answer: Trichoderma
Q560. The fungi which is used as research tools to study the law of ‘Heredity and Genetics’
- (a) Neurospora crassa ✅
- (b) Trichoderma viride
- (c) Verticillium lacani
- (d) Agaricus bisporus
Answer: Neurospora crassa
Q561. State the name of fungi which is used directly as a food
- (a) Alternaria solani
- (b) Alternaria solani
- (c) Ganoderma lucidum
- (d) Agaricus bisporus ✅
Answer: Agaricus bisporus
Q562. Which is an edible fungi?
- (a) Rhizopus
- (b) Toad stool
- (c) Mushroom ✅
- (d) All of them
Answer: Mushroom
Q563. Rhizopus stolonifer fungus is used in industries for the production of ….
- (a) Oxalic acid
- (b) Citric acid
- (c) Fumaric acid ✅
- (d) Succinic acid
Answer: Fumaric acid
Q564. Aspergillus niger fungus used in industries for the production of ….
- (a) Oxalic acid
- (b) Citric acid ✅
- (c) Fumaric acid
- (d) Succinic acid
Answer: Citric acid
Q565. Symbiotic association of some fungi with the roots of green plants is known as……
- (a) Mycorrhizae ✅
- (b) Prosenchyma
- (c) Rhizoids
- (d) Parasite
Answer: Mycorrhizae
Q566. "A relatively simple plant body devoid of stem, roots and leaves is known as "
- (a) Mycelium
- (b) Hypha
- (c) Thallus ✅
- (d) Rhizoid
Answer: Thallus
Q567. Individual filament of fungus is known as
- (a) Mycelium
- (b) Hypha ✅
- (c) Thallus
- (d) Rhizoid
Answer: Hypha
Q568. The mycelium where cross wall(septa) are absent is termed as
- (a) Septate
- (b) Aseptate ✅
- (c) Both
- (d) Thallus
Answer: Aseptate
Q569. When the mycelium lying in between the cells is termed as
- (a) Intercellular ✅
- (b) Intracellular
- (c) Both
- (d) Ectoparasitic
Answer: Intercellular
Q570. When the mycelium lying in the cells is termed as
- (a) Intercellular
- (b) Intracellular ✅
- (c) Both
- (d) Ectoparasitic
Answer: Intracellular
Q571. Fungi which grows inside the host tissues are referred as
- (a) Endophytic
- (b) Ectobiotic
- (c) Ectophytic
- (d) Endobiotic ✅
Answer: Endobiotic
Q572. A short thin hypha growing in a root like fashion towards the substrate is termed as
- (a) Rhizomorph
- (b) Rhizoids ✅
- (c) Prosenchyma
- (d) Parenchyma
Answer: Rhizoids
Q573. The absorptive knob like organ of the fungus is known as
- (a) Appressorium
- (b) Oogonium
- (c) Haustorium ✅
- (d) Rhizomorph
Answer: Haustorium
Q574. The attachment organ of the fungus is known as
- (a) Appressorium ✅
- (b) Oogonium
- (c) Haustorium
- (d) Rhizomorph
Answer: Appressorium
Q575. A type of plectenchyma with loosely woven tissues are known as….
- (a) Prosenchyma ✅
- (b) Pseudoparenchyma
- (c) Stroma
- (d) Sclerotium
Answer: Prosenchyma
Q576. The septum with one or more septal pore permitting the continuity of cytoplasm between adjacent cells are called as…..
- (a) Adventitious Septum
- (b) Primary septum ✅
- (c) Compartment
- (d) None of these
Answer: Primary septum
Q577. Fungal tissues are known as ..
- (a) Prosenchyma
- (b) Plectenchyma ✅
- (c) Pseudoparenchyma
- (d) Rhizomorph
Answer: Plectenchyma
Q578. Cell wall of fungi is made up of
- (a) Chitin ✅
- (b) Pectin
- (c) Cutin
- (d) Glucan
Answer: Chitin
Q579. Cell wall of Oomycetes fungi is made up of
- (a) Chitin
- (b) Cutin
- (c) Cellulose ✅
- (d) Pectin
Answer: Cellulose
Q580. The existence of different kinds of nuclei in the same mycelium is called
- (a) Homokaryon
- (b) Heterokaryon ✅
- (c) Homothallic
- (d) Hermaprodite
Answer: Heterokaryon
Q581. A thallus which produced single reproductive organ is known as
- (a) Monocentric ✅
- (b) Polycentric
- (c) Monoecious
- (d) Polymorphic
Answer: Monocentric
Q582. A thallus of fungi bears both male and female organs are termed as
- (a) Dioecious
- (b) Monoecious ✅
- (c) Sexually undifferentiated
- (d) None
Answer: Monoecious
Q583. A thallus is completely converted in to reproductive structures is known as …
- (a) Holocarpic ✅
- (b) Eucarpic
- (c) Homothallic
- (d) Heterocarpic
Answer: Holocarpic
Q584. A portion of thallus converts into reproductive structure is known as …
- (a) Holocarpic
- (b) Eucarpic ✅
- (c) Homothallic
- (d) Heterocarpic
Answer: Eucarpic
Q585. Fungi bearing only one sex organ is known as
- (a) Dioecious ✅
- (b) Monoecious
- (c) Hermaprodite
- (d) None
Answer: Dioecious
Q586. The sexual stage of fungus is called
- (a) Teleomorph ✅
- (b) Antheridium
- (c) Oogonium
- (d) Anamorph
Answer: Teleomorph
Q587. Asexual stage of fungi is called
- (a) Teleomorph
- (b) Holomorph
- (c) Oogonium
- (d) Anamorph ✅
Answer: Anamorph
Q588. The female sex organ of fungi is called.....
- (a) Oogonium ✅
- (b) Sporangium
- (c) Antheridium
- (d) Conidium
Answer: Oogonium
Q589. The male sex organ of fungi is called.....
- (a) Oogonium
- (b) Sporangium
- (c) Antheridium ✅
- (d) Conidium
Answer: Antheridium
Q590. The fusion of protoplasm of two opposite gametes is termed as......
- (a) Karyogamy
- (b) Plasmogamy ✅
- (c) Meiosis
- (d) Mitosis
Answer: Plasmogamy
Q591. Fusion of two compatible nuclei is known as
- (a) Karyogamy ✅
- (b) Plasmogamy
- (c) Meiosis
- (d) Mitosis
Answer: Karyogamy
Q592. The motile spore of fungi is called.....
- (a) Planospore ✅
- (b) Aplanospore
- (c) Zoospore
- (d) None of above
Answer: Planospore
Q593. The non-motile spore of fungi is called.....
- (a) Planospore
- (b) Aplanospore ✅
- (c) Zoospore
- (d) None of above
Answer: Aplanospore
Q594. Spores produced by fragmentation of hyphae are known as
- (a) Arthrospore ✅
- (b) Chlamydospore
- (c) Blastospore
- (d) Arthrospore
Answer: Arthrospore
Q595. Spores produced by budding is known as
- (a) Ballistospore
- (b) Chlamydospore
- (c) Blastospore ✅
- (d) Aplanospore
Answer: Blastospore
Q596. Flagellum with hairy projection and look like a komb is known as …
- (a) Tinsel ✅
- (b) Whiptail
- (c) Whiplash
- (d) Rhizoids
Answer: Tinsel
Q597. Which of the following phylum is not included in kingdom protists
- (a) Oomycota ✅
- (b) Myxomycota
- (c) Acrasiomycota
- (d) Plasmodiophoromycota
Answer: Oomycota
Q598. Exogenous sexual spore is
- (a) Oospore
- (b) Ascospore
- (c) Zygospore ✅
- (d) Chlamydospore
Answer: Zygospore
Q599. Endogenous sexual spore is
- (a) Oospore ✅
- (b) Zygospore
- (c) Basidiospore
- (d) Chlamydospore
Answer: Oospore
Q600. Which is asexual fruiting structure of fungi?
- (a) Pycnidium ✅
- (b) Pycnium
- (c) Basidium
- (d) Apothecium
Answer: Pycnidium
Q601. Which of the following is sexual spore of fungi?
- (a) Chlamydospore
- (b) Conidia
- (c) Arthrospore
- (d) Oospore ✅
Answer: Oospore
Q602. Which of the following is sexual fruiting structure of fungi?
- (a) Sporodochium
- (b) Synnemata
- (c) Pycnidia
- (d) Perithecium ✅
Answer: Perithecium
Q603. Flask shaped ascocarp with ostiolate is known as
- (a) Perithecium ✅
- (b) Apothecium
- (c) Cleistothecium
- (d) Acervulus
Answer: Perithecium
Q604. Completely closed ascocarp is known as
- (a) Perithecium
- (b) Apothecium
- (c) Cleistothecium ✅
- (d) Acervulus
Answer: Cleistothecium
Q605. The fusion between vegetative cells is called
- (a) Somatogamy ✅
- (b) Heterogamy
- (c) Spermatization
- (d) Isogamy
Answer: Somatogamy
Q606. Transparent or colourless hyphae of fungus is also known as….
- (a) Hyaline ✅
- (b) Pigmented
- (c) Coenocytic
- (d) Intercellular
Answer: Hyaline
Q607. Reproduction involving union of two nuclei is referred as……
- (a) Asexual
- (b) Sexual ✅
- (c) Parasexual
- (d) None of these
Answer: Sexual
Q608. "In general, ……………reproduction is more important as it results in numerous individual in short time."
- (a) Asexual ✅
- (b) Sexual
- (c) Parasexual
- (d) All of them
Answer: Asexual
Q609. Parasexuality in fungi discovered by…
- (a) E.J.Butler
- (b) G.Pontecorvo and J.A.Roper ✅
- (c) Anton de bary
- (d) Tulasne Brothers
Answer: G.Pontecorvo and J.A.Roper
Classification of Fungi
Q610. Group of related species is known as
- (a) Taxon
- (b) Species ✅
- (c) Family
- (d) Class
Answer: Species
Q611. Orderly arrangement of organisms into groups preferably in a format that shows evolutionary relationship is termed as….
- (a) Taxonomy
- (b) Classification ✅
- (c) Nomenclature
- (d) Taxon
Answer: Classification
Q612. ………… is a noun in Latin language written in italic with its first letter capital.
- (a) Taxon
- (b) Genus ✅
- (c) Species
- (d) Class
Answer: Genus
Q613. "In fungal classification, phylum ends with……."
- (a) aceae
- (b) mycetes
- (c) mycota ✅
- (d) ales
Answer: mycota
Q614. "In fungal classification, class ends with……."
- (a) aceae
- (b) mycetes ✅
- (c) mycotina
- (d) ales
Answer: mycetes
Q615. "In fungal classification, order ends with……."
- (a) aceae
- (b) mycetes
- (c) mycota
- (d) ales ✅
Answer: ales
Q616. "In fungal classification, family ends with……."
- (a) aceae ✅
- (b) mycetes
- (c) mycota
- (d) ales
Answer: aceae
Q617. Which of the following phylum is not included in kingdom Stramenopila
- (a) Oomycota
- (b) Plasmodiophoromycota ✅
- (c) Hyphochytriomycota
- (d) Labyrinthulomycota
Answer: Plasmodiophoromycota
Q618. Which of the following phylum is not included in kingdom Fungi
- (a) Zygomycota
- (b) Ascomycota
- (c) Oomycota ✅
- (d) Basidiomycota
Answer: Oomycota
Q619. Generally each ascus produces _______ ascospores
- (a) Four
- (b) Eight ✅
- (c) Two
- (d) Six
Answer: Eight
Q620. Generally each basidium produces _______ basidiospores
- (a) Four ✅
- (b) Eight
- (c) Two
- (d) Six
Answer: Four
Q621. Clamp connection is characteristics of
- (a) Ascomycota
- (b) Oomycota
- (c) Basidiomycota ✅
- (d) Zygomycota
Answer: Basidiomycota
Q622. Asexual (Imperfect fungi) belonging to class
- (a) Basidiomycetes
- (b) Pyrenomycetes
- (c) Zygomycetes
- (d) Deuteromycetes ✅
Answer: Deuteromycetes
Q623. Downy mildew fungi belong to family is…
- (a) Pythiaceae
- (b) Albuginaceae
- (c) Peronosporaceae ✅
- (d) Mucoraceae
Answer: Peronosporaceae
Q624. "A compact somatic structure,much like a mattress ,on which or in which fructification usually formed is known as …."
- (a) Pseudoparenchyma
- (b) Prosenchyma
- (c) Sclerotium
- (d) Stroma ✅
Answer: Stroma
Q625. Cushion like structure on which conidiophores and conidia are formed is known as …
- (a) Sporodochium ✅
- (b) Synnemata
- (c) Acervulus
- (d) Sorus
Answer: Sporodochium
Q626. White rust of crucifers is caused by
- (a) Puccinia
- (b) Uromyces
- (c) Hemielia
- (d) Albugo ✅
Answer: Albugo
Q627. Zoospores produced in vesicle is characteristics of
- (a) Pythium ✅
- (b) Plasmopara
- (c) Phytophthora
- (d) Albugo
Answer: Pythium
Q628. The production of endophytic slime mold is characteristics of ….
- (a) Ascomycota
- (b) Oomycota
- (c) Zygomycota
- (d) Plasmodiophoromycota ✅
Answer: Plasmodiophoromycota
Q629. "In rust fungi, sexual spore is …"
- (a) Uredospore
- (b) Aeciospore
- (c) Teliospore ✅
- (d) Pycniospore
Answer: Teliospore
Q630. "In rust fungi, asexual spore is …"
- (a) Uredospore ✅
- (b) Aeciospore
- (c) Teliospore
- (d) Pycniospore
Answer: Uredospore
Q631. An outgrowth resulting form an abnormal increase in the number of cells is called..
- (a) Hyperplasia ✅
- (b) Hypertrophy
- (c) Hypoplasia
- (d) Hypotrophy
Answer: Hyperplasia
Q632. An outgrowth resulting form an abnormal increase in the size of cells is called
- (a) Hyperplasia
- (b) Hypertrophy ✅
- (c) Hypoplasia
- (d) Hypotrophy
Answer: Hypertrophy
Q633. "A rust having all the five spore types(aeciospores, uredospores, teleospores, basidiospores and spermatia)in its life cycle is known as…."
- (a) Microcyclic rust
- (b) Macrocyclic rust ✅
- (c) Demicyclic rust
- (d) Polycyclic rust
Answer: Macrocyclic rust
Prokaryote – Bacteria
Q634. Gram positive bacteria belongs to division....
- (a) Gracilicutes
- (b) Firmicutes ✅
- (c) Tenericutes
- (d) Mendosicutes
Answer: Firmicutes
Q635. Gram negative bacteria belongs to division.....
- (a) Gracilicutes ✅
- (b) Firmicutes
- (c) Tenericutes
- (d) Mendosicutes
Answer: Gracilicutes
Q636. Bacterial flagella found around the cell is known as ....
- (a) Lophotrichus
- (b) Peritrichous ✅
- (c) Amphitrichous
- (d) Monotrichous
Answer: Peritrichous
Q637. Bacterial cells with single flagellum is known as....
- (a) Atrichus
- (b) Peritrichous
- (c) Amphitrichous
- (d) Monotrichous ✅
Answer: Monotrichous
Q638. The bacterial cells without flagella is known as ….
- (a) Atrichus ✅
- (b) Peritrichous
- (c) Amphitrichous
- (d) Monotrichous
Answer: Atrichus
Q639. A german scientist who studied the anthrax disease of cattle and sheep....
- (a) Robert Koch ✅
- (b) E.C.Stackman
- (c) Robert Hook
- (d) G.Rangaswami
Answer: Robert Koch
Q640. Bacillus substillis cells are....
- (a) Rod shape ✅
- (b) Spherical
- (c) Spiral
- (d) Vibrio comma shape
Answer: Rod shape
Q641. Arthrobacter bacterial cells are...
- (a) Rod shape
- (b) Spherical
- (c) Pleomorphic ✅
- (d) Vibrio comma shape
Answer: Pleomorphic
Q642. Agar agar is obtained from ….
- (a) Gelatin
- (b) Algae ✅
- (c) Animal
- (d) Plant
Answer: Algae
Q643. “Journal of Mycology and Plant Pathology” is published from….
- (a) New Delhi
- (b) Anand
- (c) Udaipur ✅
- (d) Hissar
Answer: Udaipur
Q644. “Indian Phytopathology” Journal is published from…
- (a) New Delhi ✅
- (b) Anand
- (c) Udaipur
- (d) Hissar
Answer: New Delhi
Principles of Plant Pathology
Introduction, Definition and Objectives of Plant Pathology
Q645. The capacity of a pathogen to cause disease is known as _______.
- (a) Pathogen
- (b) Parasite
- (c) Pathogenicity ✅
- (d) Plant disease
Answer: Pathogenicity
Q646. Plant resistance governed by a single gene pair is called as________resistance.
- (a) Oligogenic
- (b) Polygenic
- (c) Monogenic ✅
- (d) None of the above
Answer: Monogenic
Q647. 2500 ppm is equivalent to ____________ %.
- (a) 25
- (b) 2.5
- (c) 0.025
- (d) 0.25 ✅
Answer: 0.25
Q648. Carbendazim is traded as_________.
- (a) Bavistin ✅
- (b) Dithane M-45
- (c) Kavach
- (d) Blue copper
Answer: Bavistin
Q649. Generally non-systemic fungicides are used in concentration of ________ %.
- (a) 1 to 2
- (b) 0.2 to 0.3 ✅
- (c) 0.025 to 0.05
- (d) 2 to 4
Answer: 0.2 to 0.3
Q650. Generally systemic fungicides are used in concentration of _____%.
- (a) 1 to 2
- (b) 1 to 2
- (c) 0.025 to 0.05 ✅
- (d) 0.025 to 0.05
Answer: 0.025 to 0.05
Q651. In India, plant disease cause approximately crop loss of _______%.
- (a) 06
- (b) 16
- (c) 26 ✅
- (d) 36
Answer: 26
Q652. Aflatoxin is produced by ___________the fungus.
- (a) Claviceps purpurea
- (b) Penicillium spp.
- (c) Aspergillus flavus ✅
- (d) All of the above
Answer: Aspergillus flavus
Q653. Tomato leaf curl is caused by the__________.
- (a) Virus ✅
- (b) Bacteria
- (c) Fungi
- (d) Nematode
Answer: Virus
Q654. Root knot disease is caused by the ________.
- (a) Virus
- (b) Bacteria
- (c) Fungi
- (d) Nematode ✅
Answer: Nematode
Q655. Ergotoxin is produced by________. the fungus:
- (a) Penicillium spp.
- (b) Aspergillus flavus
- (c) Claviceps purpurea ✅
- (d) None of the above
Answer: Claviceps purpurea
Q656. Rust fungi are also known as_________.
- (a) Autotrophs
- (b) Biotrophs ✅
- (c) Heterotrophs
- (d) None of the above
Answer: Biotrophs
Q657. Oligogenic resistance governed by_________.
- (a) Single gene pair
- (b) Few genes pairs ✅
- (c) Many gene pairs
- (d) None of the above
Answer: Few genes pairs
Q658. The presence of a pathogen or its parts / products seen on a host plant is termed as__.
- (a) Syndrome
- (b) Sign ✅
- (c) Symptom
- (d) Virulence
Answer: Sign
Q659. The degree of pathogenicity of a pathogen is termed as ____.
- (a) Virulence ✅
- (b) Infection
- (c) Pathogenicity
- (d) Pathogenesis
Answer: Virulence
Q660. The science deals with the study of fungi is termed as _____.
- (a) Plant Pathology
- (b) Virology
- (c) Mycology ✅
- (d) Phanerogamology
Answer: Mycology
Q661. ______ disease of potato caused Irish famine in Ireland.
- (a) Late blight ✅
- (b) Brown rot
- (c) Early blight
- (d) Scab
Answer: Late blight
Q662. _____disease of paddy caused Bengal famine in India.
- (a) Bacterial leaf blight
- (b) Brown leaf spot ✅
- (c) False smut
- (d) None of above
Answer: Brown leaf spot
Q663. Khaira disease of paddy is due to deficiency of ____.
- (a) Zinc ✅
- (b) Iron
- (c) Boron
- (d) None of above
Answer: Zinc
Q664. Plant resistance governed by many gene pair is called as_______resistance.
- (a) Oligogenic
- (b) Polygenic ✅
- (c) Monogenic
- (d) None of the above
Answer: Polygenic
Q665. Plant resistance governed by double gene pair is called as________resistance.
- (a) Oligogenic ✅
- (b) Polygenic
- (c) Monogenic
- (d) None of the above
Answer: Oligogenic
Q666. Necrosis of mango fruits is due to deficiency of ____.
- (a) Zinc
- (b) Iron
- (c) Boron ✅
- (d) None of above
Answer: Boron
Q667. Black heart of potato is due to unfavourable_______relation in store and in field.
- (a) Oxygen ✅
- (b) Carbon
- (c) Nitrogen
- (d) Sulphur
Answer: Oxygen
History of Plant Pathology
Q668. First plant parasitic nematode discovered was___________.
- (a) Globodera sp.
- (b) Anguina tritici ✅
- (c) Meloidogyne sp.
- (d) Heterodera sp.
Answer: Anguina tritici
Q669. Tobacco mosaic disease is caused by __________.
- (a) Nematode.
- (b) Bacteria
- (c) Fungi
- (d) Virus ✅
Answer: Virus
Q670. Which of the following book was written by Surpal?
- (a) Vriksha Ayurveda ✅
- (b) Plant disease
- (c) The Fungi
- (d) Plant Pathology
Answer: Vriksha Ayurveda
Q671. Who of the following is regarded as “Father of Modern Plant Pathology”?
- (a) R.S. Singh
- (b) Millardet
- (c) T.J. Burill
- (d) Anton de Bary ✅
Answer: Anton de Bary
Q672. Who of the following is regarded as “Father of Medical Bacteriology”?
- (a) Tillet
- (b) Robert Koch ✅
- (c) Anton de Bary
- (d) Linnaeus
Answer: Robert Koch
Q673. Which of the following scientist is regarded as Linnaeus of Mycology?
- (a) E.M. Fries ✅
- (b) Anton de Bary
- (c) Linnaeus
- (d) Millardet
Answer: E.M. Fries
Q674. A book “Nova Plantarum Genera” was published by________.
- (a) P.A. Micheli ✅
- (b) Anton de Bary
- (c) T. Needham
- (d) Millardet
Answer: P.A. Micheli
Q675. Who is considered as “Father of Mycology”?
- (a) P.A. Micheli ✅
- (b) Anton de Bary
- (c) E.J. Butler
- (d) Millardet
Answer: P.A. Micheli
Q676. Who reported first plant parasitic nematode?
- (a) T. Needham ✅
- (b) Anton de Bary
- (c) E.J. Butler
- (d) Millardet
Answer: T. Needham
Q677. Who is considered as “Father of Botany”?
- (a) T. Needham
- (b) Linnaeus ✅
- (c) E.J. Butler
- (d) Prevost
Answer: Linnaeus
Q678. Who was the first man to suggest or use of chemical copper sulphate for seed treatment to control seed borne disease?
- (a) P.A. Micheli
- (b) Anton de Bary
- (c) Prevost ✅
- (d) Millardet
Answer: Prevost
Q679. First time discovery of Tobacco Mosaic Virus (TMV) by______.
- (a) Adolph Mayer ✅
- (b) J.C. Walker
- (c) M.W. Beijerinck
- (d) W.M. Stanley
Answer: Adolph Mayer
Q680. Who first time purified and crystallized Tobacco Mosaic Virus (TMV).
- (a) Adolph Mayer
- (b) J.C. Walker
- (c) W.M. Stanley ✅
- (d) M.W. Beijerinck
Answer: W.M. Stanley
Q681. A book “Fungi and Disease in Plants” was published by ________.
- (a) B.B. Mundkur
- (b) E.J. Butler ✅
- (c) J.F. Dastur
- (d) M.W. Beijerinck
Answer: E.J. Butler
Q682. A book “Fungi and Plant Disease” was published by ________.
- (a) Stakman E.C.
- (b) E.J. Butler
- (c) J.F. Dastur
- (d) B.B. Mundkur ✅
Answer: B.B. Mundkur
Q683. A book “Introduction to Principles of Plant Pathology” was published by _____.
- (a) G.N. Agrios ✅
- (b) E.J. Butler
- (c) R.S. Singh
- (d) B.B. Mundkur
Answer: G.N. Agrios
Q684. Which of the following fungicide was discovered by Professor Millardet?
- (a) Mancozeb
- (b) Vitavax
- (c) Bordeaux mixture ✅
- (d) Burgandy mixture
Answer: Bordeaux mixture
Q685. “Species Plantarum” is the greatest contribution of :
- (a) T. Needham
- (b) P.A. Micheli
- (c) Prevost
- (d) Linnaeus ✅
Answer: Linnaeus
Q686. The term “Contagium Vivum Fluidum” was given by_______.
- (a) Adolph Mayer
- (b) J.C. Walker
- (c) W.M. Stanley
- (d) M.W. Beijerinck ✅
Answer: M.W. Beijerinck
Q687. “Nova Plantarum Genera” was written by_________.
- (a) Linnaeus
- (b) Prevost
- (c) P.A. Micheli ✅
- (d) Anton de Bary
Answer: P.A. Micheli
Q688. “Vriksha Ayurveda” is an ancient Indian book written by_________.
- (a) Surpal ✅
- (b) Aristotle
- (c) R.S. Singh
- (d) Theopharastus
Answer: Surpal
Q689. Club root disease of cruciferous plants was discovered by ________.
- (a) T.J. Burril
- (b) Robert Koch
- (c) Millardet
- (d) Woronin ✅
Answer: Woronin
Q690. Which of the following fungicide was discovered in France to control the downy mildew of grape?
- (a) Mancozeb
- (b) Copper oxychloride
- (c) Ceresan
- (d) Bordeaux mixture ✅
Answer: Bordeaux mixture
Q691. Important contribution of Robert Koch is ________.
- (a) Koch’s Postulates ✅
- (b) Discovery of antibiotics
- (c) Discovery of spiroplasma
- (d) Discovery of TMV
Answer: Koch’s Postulates
Q692. The first bacterial disease in apple and pear was reported by______ the scientist:
- (a) Needham
- (b) T.J. Burrill ✅
- (c) P.A. Micheli
- (d) Anton de Bary
Answer: T.J. Burrill
Q693. Who of the following is called the “Father of Plant Pathology of India”?
- (a) E.J. Butler ✅
- (b) R.S. Singh
- (c) P.A. Micheli
- (d) M.K. Patel
Answer: E.J. Butler
Q694. MLO’s (Phytoplasma) was discovered by__________.
- (a) Doi and Ishi ✅
- (b) Diener, T.O.
- (c) Jones, L.R.
- (d) P.A. Micheli
Answer: Doi and Ishi
Q695. The book entitled, “Introduction to principles of plant pathology” is written by __________.
- (a) R.S. Singh
- (b) S.R. Singh
- (c) J.G. Manners
- (d) G.N. Agrios ✅
Answer: G.N. Agrios
Q696. The book entitled, “Vriksha Ayurveda” is written by ____.
- (a) S.R. Singh
- (b) R.S. Singh
- (c) J.G. Manners
- (d) Surpal ✅
Answer: Surpal
Q697. The first plant parasitic nematodes causing ear cockle disease of wheat was reported by_____.
- (a) T. Needham ✅
- (b) P.M.A. Millardet
- (c) N.A. Cobb
- (d) B.B. Mundkur
Answer: T. Needham
Q698. The postulates for proving the pathogenicity of a pathogen was first time given by ___.
- (a) Robert Koch ✅
- (b) T.J. Burrill
- (c) B.B. Mundkur
- (d) K.C. Mehta
Answer: Robert Koch
Q699. The Bordeaux mixture was first time used for management of downy mildew of grape by ____.
- (a) B.B. Mundkur
- (b) N.A. Cobb
- (c) P.M.A. Millardet ✅
- (d) T. Needham
Answer: P.M.A. Millardet
Q700. ____ is known as Father of Nematology.
- (a) N.A. Cobb ✅
- (b) P.M.A. Millardet
- (c) T.J. Burrill
- (d) B.B. Mundkur
Answer: N.A. Cobb
Q701. ______ is considered as father of Indian Plant Pathology.
- (a) E.J. Butler ✅
- (b) J.F. Dastur
- (c) K.C. Mehta
- (d) B.B. Mundkur
Answer: E.J. Butler
Q702. _____ has single handed established the Indian Phytopathological Society with its journal “Indian Phytopathology”.
- (a) B.B. Mundkur ✅
- (b) M.J. Thirumalachar
- (c) E.J. Butlar
- (d) J.F. Dastur
Answer: B.B. Mundkur
Q703. _____ has discovered the disease cycle of cereal rust in India.
- (a) K.C. Mehta ✅
- (b) J.F. Dastur
- (c) M.K. Patel
- (d) B.B. Mundkur
Answer: K.C. Mehta
Q704. _____ has first time discovered the tobacco mosaic virus.
- (a) Adolph Mayer ✅
- (b) Persoon
- (c) Anton De Barry
- (d) N.A. Cobb
Answer: Adolph Mayer
Terms and Concepts in Plant Pathology
Survival of Plant Pathogens
Q705. Primary infection ___________ the disease.
- (a) Initiate ✅
- (b) Spread
- (c) Both (a) and (b)
- (d) None of the above
Answer: Initiate
Q706. Secondary infection ______ disease.
- (a) Initiate
- (b) Spread ✅
- (c) Both (a) and (b)
- (d) None of the above
Answer: Spread
Q707. Survival of plant pathogens is the _______ link in infection chain.
- (a) First ✅
- (b) Second
- (c) Third
- (d) Fourth
Answer: First
Q708. Organism which survive indefinitely in the soil as saprophytes in the absence of the host plant is known as ___________.
- (a) Soil invaders
- (b) Rhizosphere colonizers
- (c) Soil inhabitants ✅
- (d) Root inhabitants
Answer: Soil inhabitants
Q709. A parasitic fungus that can complete its entire life cycle on the same host is called as ___________.
- (a) Autoecious rust ✅
- (b) Heteroecious rust
- (c) Both (a) and (b)
- (d) None of the above
Answer: Autoecious rust
Q710. ___________ disease is an example of autoecious rust?
- (a) Bajra rust
- (b) Black stem rust of wheat ✅
- (c) Leaf rust of wheat
- (d) Linseed rust
Answer: Black stem rust of wheat
Q711. A parasitic fungus that requires two different kinds of hosts to complete its life cycle is called as ___________.
- (a) Autoecious rust
- (b) Heteroecious rust ✅
- (c) Both (a) and (b)
- (d) None of the above
Answer: Heteroecious rust
Q712. Alternate host of black stem rust of wheat is ___________.
- (a) Bajra
- (b) Brinjal
- (c) Barberry ✅
- (d) Groundnut
Answer: Barberry
Q713. Alternate host of bajra rust is ___________.
- (a) Wheat
- (b) Brinjal ✅
- (c) Barberry
- (d) Groundnut
Answer: Brinjal
Q714. Pythium fungus persist in the soil as _________ dormant structure.
- (a) Oospores ✅
- (b) Chlamydospores
- (c) Sclerotia
- (d) Perithecia
Answer: Oospores
Q715. Fusarium spp. persist in the soil as _________ dormant structure.
- (a) Oospores
- (b) Chlamydospores ✅
- (c) Sclerotia
- (d) Perithecia
Answer: Chlamydospores
Q716. Infective unit of fungi is known as __________.
- (a) Propagules ✅
- (b) No. of particles
- (c) Both (a) and (b)
- (d) None of the above
Answer: Propagules
Q717. Loose smut of wheat is ____________ disease.
- (a) Internally seed-borne ✅
- (b) Externally seed-borne
- (c) Air-borne
- (d) Soil-borne
Answer: Internally seed-borne
Q718. Grain smut of sorghum is _________ disease.
- (a) Internally seed borne
- (b) Externally seed borne ✅
- (c) Air borne
- (d) Soil borne
Answer: Externally seed borne
Q719. The microorganisms which survive on dead tissues of plants are known as
- (a) Biotrophs
- (b) Nectrotrophs ✅
- (c) Both (a) and (b)
- (d) None of the above
Answer: Nectrotrophs
Q720. The immediate surrounding of the roots in the soil is known as ________.
- (a) Phyllosphere
- (b) Troposphere
- (c) Rhizosphere ✅
- (d) None of the above
Answer: Rhizosphere
Q721. Downy mildew fungi survive in soil as________.
- (a) Conidia
- (b) Oospore ✅
- (c) Mycelia
- (d) Perithecia
Answer: Oospore
Q722. Fusarium spp mainly survive in soil as________.
- (a) Conidia
- (b) Oospore
- (c) Chlamydospores ✅
- (d) Perithecia
Answer: Chlamydospores
Q723. Crop rotation is recommended for the management of________disease.
- (a) Seed- borne
- (b) Soil -borne ✅
- (c) Air -borne
- (d) None of the above
Answer: Soil -borne
Q724. Orobanche is _________plant parasite.
- (a) Total stem
- (b) Partial stem
- (c) Total root ✅
- (d) Partial root
Answer: Total root
Q725. Cuscutta (Amarvel) is ________plant parasite.
- (a) Total stem ✅
- (b) Partial stem
- (c) Total root
- (d) Partial root
Answer: Total stem
Q726. Striga is _________ plant parasite.
- (a) Total stem
- (b) Partial stem
- (c) Total root
- (d) Partial root ✅
Answer: Partial root
Q727. Loranthus is __________ plant parasite.
- (a) Total stem
- (b) Partial stem ✅
- (c) Total root
- (d) Partial root
Answer: Partial stem
Q728. Alternaria spp. are also known as_________.
- (a) Autotrophs
- (b) Biotrophs
- (c) Necrotrophs ✅
- (d) Obligate parasite
Answer: Necrotrophs
Q729. The pathogens which require living host for multiplication are known as______.
- (a) Biotrophs ✅
- (b) Nectrotrophs
- (c) Both (a) and (b)
- (d) None of the above
Answer: Biotrophs
Q730. ___________ have no resting stage.
- (a) Fungi
- (b) Nematode
- (c) Virus ✅
- (d) All of the above
Answer: Virus
Q731. ____disease of wheat is internally seed-borne.
- (a) Loose smut ✅
- (b) Black stem rust
- (c) Yellow rust
- (d) Brown rust
Answer: Loose smut
Q732. ______ disease of sorghum is externally seed-borne.
- (a) Grain smut ✅
- (b) Head smut
- (c) Long smut
- (d) Black smut
Answer: Grain smut
Q733. Wilt disease causing pathogen Fusarium oxysporium produces _____ dormant spores.
- (a) Conidia
- (b) Oospore
- (c) Chlamydospore ✅
- (d) Aplanospore
Answer: Chlamydospore
Q734. ________ disease of wheat is the example of heteroecious rust.
- (a) Black stem rust ✅
- (b) Brown rust
- (c) Yellow rust
- (d) Stripe rust
Answer: Black stem rust
Q735. Downy mildew disease causing pathogen produces _____ resting spores.
- (a) Oospore ✅
- (b) Chlamydospore
- (c) Conidia
- (d) Aplanospore
Answer: Oospore
Q736. _______ is the complete root plant parasite.
- (a) Cuscuta
- (b) Striga
- (c) Broomrape ✅
- (d) Loranthus
Answer: Broomrape
Q737. _______is the partial stem plant parasite.
- (a) Dodder
- (b) Loranthus ✅
- (c) Striga
- (d) Orobanche
Answer: Loranthus
Q738. _______is the first link in infection chain/disease cycle.
- (a) Survival ✅
- (b) Dissemination
- (c) Infection
- (d) None of above
Answer: Survival
Q739. _______ is the complete stem plant parasite.
- (a) Cuscuta ✅
- (b) Striga
- (c) Broomrape
- (d) Loranthus
Answer: Cuscuta
Q740. _______is the partial root plant parasite.
- (a) Dodder
- (b) Loranthus
- (c) Striga ✅
- (d) Orobanche
Answer: Striga
Dispersal of Plant Pathogens
Q741. Direct dispersal is also known as___________.
- (a) Active dispersal ✅
- (b) Passive dispersal
- (c) Both (a) and (b)
- (d) None of the above
Answer: Active dispersal
Q742. Tobacco rattle virus is an example of__________.
- (a) NEPO
- (b) NETU ✅
- (c) Both (a) and (b)
- (d) None of the above
Answer: NETU
Q743. Floral part converted into leafy structure is called as ________.
- (a) Necrosis
- (b) Phyllody ✅
- (c) Chlorosis
- (d) None of the above
Answer: Phyllody
Q744. Dissemination of plant pathogen is ______ link in infection chain.
- (a) First
- (b) Second ✅
- (c) Third
- (d) Fourth
Answer: Second
Q745. Autonomous dispersal of infectious plant pathogen is also known as ________.
- (a) Active dispersal ✅
- (b) Passive dispersal
- (c) Third
- (d) Fourth
Answer: Active dispersal
Q746. Indirect dispersal of infectious plant pathogen is also known as ________.
- (a) Active dispersal
- (b) Passive dispersal ✅
- (c) Third
- (d) Fourth
Answer: Passive dispersal
Q747. Black scurf of potato was introduced in Gujarat through seed tubers brought from _________ state.
- (a) Maharashtra
- (b) Madhya Pradesh
- (c) Himachal Pradesh ✅
- (d) Uttar Pradesh
Answer: Himachal Pradesh
Q748. Potato leaf roll virus is transmitted by________.
- (a) Aphid ✅
- (b) Jassid
- (c) Whitefly
- (d) Thrips
Answer: Aphid
Q749. Yellow vein mosaic of okra is transmitted by________.
- (a) Aphid
- (b) Jassid
- (c) Whitefly ✅
- (d) Thrips
Answer: Whitefly
Q750. Leaf curl of chilli/papaya/bhindi/tomato is transmitted by_________.
- (a) Aphid
- (b) Jassid
- (c) Whitefly ✅
- (d) Thrips
Answer: Whitefly
Q751. Tomato spotted wilt virus is transmitted by________.
- (a) Aphid
- (b) Jassid
- (c) Whitefly
- (d) Thrips ✅
Answer: Thrips
Q752. Bud necrosis of groundnut is transmitted by________.
- (a) Aphid
- (b) Jassid
- (c) Whitefly
- (d) Thrips ✅
Answer: Thrips
Q753. Tobacco Mosaic virus is transmitted by_______.
- (a) Aphid
- (b) Jassid
- (c) Mechanical transmission ✅
- (d) Thrips
Answer: Mechanical transmission
Q754. Mycoplasma diseases are transmitted by________.
- (a) Aphid
- (b) Leaf hopper ✅
- (c) Whitefly
- (d) Thrips
Answer: Leaf hopper
Q755. Sesamum phyllody and little leaf of brinjal are caused by________.
- (a) Fungus
- (b) Mycoplasma ✅
- (c) Bacteria
- (d) Virus
Answer: Mycoplasma
Q756. Sesamum phyllody is transmitted by________.
- (a) Aphid
- (b) Whitefly
- (c) Leaf hopper ✅
- (d) Thrips
Answer: Leaf hopper
Q757. Little leaf of brinjal disease is transmitted by________.
- (a) Aphid
- (b) Whitefly
- (c) Jassid ✅
- (d) Thrips
Answer: Jassid
Q758. Pigeonpea sterility mosaic virus is transmitted by_________.
- (a) Aphid
- (b) Whitefly
- (c) Jassid
- (d) Mite (eryophyiid mite) ✅
Answer: Mite (eryophyiid mite)
Q759. Fan leaf virus of grape is transmitted by________.
- (a) Trichodorus
- (b) Xiphinema ✅
- (c) Longidorus
- (d) Paratrichodorus
Answer: Xiphinema
Q760. The dispersal of pathogens by wind is called as ________.
- (a) Anemochory ✅
- (b) Hydrochory
- (c) Both (a) and (b)
- (d) None of the above
Answer: Anemochory
Q761. Plant viruses are quickly transmitted by________.
- (a) Aphids
- (b) Thrips
- (c) Whitefly
- (d) All the above ✅
Answer: All the above
Q762. Ergot of bajra is generally disseminated by_________.
- (a) Birds
- (b) Irrigation
- (c) Thrips
- (d) Flies ✅
Answer: Flies
Q763. _____ is the alternate host of bajara rust.
- (a) Brinjal ✅
- (b) Okra
- (c) Potato
- (d) Cucumber
Answer: Brinjal
Q764. ______ is the complete stem plant parasite.
- (a) Dodder ✅
- (b) Striga
- (c) Orobanche
- (d) Loranthus
Answer: Dodder
Q765. Yellow vein mosaic disease of okra is transmitted by ______.
- (a) White fly ✅
- (b) Aphid
- (c) Jassid
- (d) Thrips
Answer: White fly
Q766. Dispersal of pathogen by wind is known as _____.
- (a) Zoochory
- (b) Hydrochory
- (c) Anemochory ✅
- (d) Anthropochory
Answer: Anemochory
Q767. Little leaf of brinjal disease is transmitted by_______.
- (a) Leafhopper ✅
- (b) White fly
- (c) Aphid
- (d) Thrips
Answer: Leafhopper
Q768. __________ is the partial root plant parasite.
- (a) Dodder
- (b) Striga ✅
- (c) Orobanchey
- (d) Loranthus
Answer: Striga
Q769. Sesamum phyllody disease is transmitted by ______.
- (a) Jassid ✅
- (b) White fly
- (c) Aphid
- (d) Thrips
Answer: Jassid
Q770. Dispersal of pathogen by water is known as ____.
- (a) Hydrochory ✅
- (b) Anemochory
- (c) Zoochory
- (d) Anthropochory
Answer: Hydrochory
Q771. Barberry is the alternate host of _______ disease of wheat.
- (a) Brown rot
- (b) Black stem rust ✅
- (c) Yellow rust
- (d) Loose smut
Answer: Black stem rust
Q772. Dissemination of pathogen by birds is known as _____.
- (a) Hydrochory
- (b) Anemochory
- (c) Zoochory ✅
- (d) Anthropochory
Answer: Zoochory
Q773. Tomato spotted wilt virus is transmitted by _____.
- (a) Thrips ✅
- (b) Jassid
- (c) White fly
- (d) Aphid
Answer: Thrips
Q774. Sterility mosaic of pigeon pea is transmitted by ______.
- (a) Mite ✅
- (b) Aphid
- (c) Jassid
- (d) White fly
Answer: Mite
Q775. Ear cockle nematode transmits _____ disease of wheat.
- (a) Yellow ear rot ✅
- (b) Black rust
- (c) Yellow rust
- (d) Brown rust
Answer: Yellow ear rot
Q776. The dispersal of pathogens by animal is termed as ______.
- (a) Hydrochory
- (b) Anemochory
- (c) Zoochory
- (d) Anthropochory ✅
Answer: Anthropochory
Q777. _______is second link in the infection chain /disease cycle.
- (a) Survival
- (b) Dispersal ✅
- (c) Infection
- (d) None of above
Answer: Dispersal
Phenomenon of Infection/Infection Process
Q778. A parasite that lives and feeds from the exterior of its host's cells or tissues is called as ____________.
- (a) Ectoparasite ✅
- (b) Endoparasite
- (c) Both (a) and (b)
- (d) None of the above
Answer: Ectoparasite
Q779. A parasite that lives and feeds within the cells or tissue of its host is called as___.
- (a) Ectoparasite
- (b) Endoparasite ✅
- (c) Both (a) and (b)
- (d) None of the above
Answer: Endoparasite
Q780. The initial invasion of a host by a pathogen is known as _______.
- (a) Penetration ✅
- (b) virulent
- (c) Infection
- (d) Transmission
Answer: Penetration
Q781. The establishment of a parasite within a host plant is called as ________.
- (a) Penetration
- (b) Inoculation
- (c) Infection ✅
- (d) Transmission
Answer: Infection
Q782. Death of tissue is known as _________.
- (a) Necrosis ✅
- (b) Phyllody
- (c) Chlorosis
- (d) None of the above
Answer: Necrosis
Q783. The swollen tip of hypha or germ tube that facilitates for attachment to the host by the fungus is known as ___________.
- (a) Appressorium ✅
- (b) Haustorium
- (c) Both (a) and (b)
- (d) None of the above
Answer: Appressorium
Q784. Bacteria enter plants mostly through _________.
- (a) Wounds ✅
- (b) Stomata
- (c) Lenticels
- (d) None of the above
Answer: Wounds
Q785. Which of the following fungi is an example of ectoparasite?
- (a) Downy mildew
- (b) Loose smut
- (c) Early blight
- (d) Powdery mildew ✅
Answer: Powdery mildew
Q786. The time interval between inoculation and appearance of disease symptoms is called as ____________.
- (a) Incubation period ✅
- (b) Disease period
- (c) Control period
- (d) None of the above
Answer: Incubation period
Q787. More nitrogenous fertilizers application makes the host more ________.
- (a) Resistant
- (b) Susceptible ✅
- (c) Both (a) and (b)
- (d) None of the above
Answer: Susceptible
Q788. Excessive enlargement in cell number due to infection is known as_______
- (a) Hyperplasia ✅
- (b) Hypertrophy
- (c) Both (a) and (b)
- (d) None of the above
Answer: Hyperplasia
Q789. Haustorium is the organ for________.
- (a) Absorption of food ✅
- (b) Penetration of the pathogen
- (c) Attachment of the host
- (d) None of the above
Answer: Absorption of food
Q790. Appressorium is the organ for________.
- (a) Absorption of food
- (b) Penetration of the pathogen
- (c) Attachment of the host ✅
- (d) None of the above
Answer: Attachment of the host
Q791. The organisms which cause the diseases in the plants are known as_________.
- (a) Saprophytes
- (b) Parasites
- (c) Pathogens ✅
- (d) Soil invaders
Answer: Pathogens
Q792. The pathogen may penetrate into the ovary and cause infection of the embryo is known as________ pathogen.
- (a) Internally seed -borne ✅
- (b) Soil -borne
- (c) Externally seed -borne
- (d) All of the above
Answer: Internally seed -borne
Q793. Infection of black stem rust of wheat is more in _________ crop.
- (a) Early sowing
- (b) Late sowing ✅
- (c) Middle sowing
- (d) None of the above
Answer: Late sowing
Q794. The minimum quantum / quantity of infectious propagules of a pathogen to cause disease is termed as ____.
- (a) Inoculum potential ✅
- (b) Penetration
- (c) Isolation potential
- (d) Inoculation
Answer: Inoculum potential
Q795. Excessive enlargement of cell size due to infection is known as _____.
- (a) Hypertrophy ✅
- (b) Hypotrophy
- (c) Hypoplasia
- (d) Hyperplasia
Answer: Hypertrophy
Q796. The fungal organ developed for attachment to the host surface is termed as __.
- (a) Appressorium ✅
- (b) Haustorium
- (c) Rhizomorph
- (d) Rhizoid
Answer: Appressorium
Q797. The fungal organ developed for absorption of nutrient from the cells is termed as____.
- (a) Rhizoid
- (b) Rhizomorph
- (c) Haustorium ✅
- (d) Appressorium
Answer: Haustorium
Q798. Bacteria causing bacterial leaf blight of paddy enters through____ natural opening in plant.
- (a) Stomata
- (b) Hydethode ✅
- (c) Lenticel
- (d) None of above
Answer: Hydethode
Q799. _______ is the third link of infection chain / disease cycle.
- (a) Survival
- (b) Dissemination
- (c) Infection ✅
- (d) None of above
Answer: Infection
Q800. More potashic fertilizer application makes plant more______.
- (a) Susceptible
- (b) Virulent
- (c) Resistant ✅
- (d) Succulent
Answer: Resistant
Q801. Pathogenesis is ______ link in infection chain/disease cycle.
- (a) First
- (b) Second
- (c) Third ✅
- (d) Fourth
Answer: Third
Role of Enzymes in Pathogenesis
Q802. Pectinase enzyme is responsible for degradation of________.
- (a) Protein
- (b) Cellulose
- (c) Pectin ✅
- (d) Fat
Answer: Pectin
Q803. Cellulase enzyme is responsible for degradation of_________.
- (a) Cellulose ✅
- (b) Protein
- (c) Fat
- (d) Pectin
Answer: Cellulose
Q804. Starch is degraded by_________ enzyme.
- (a) Amylases ✅
- (b) Cellulases
- (c) Cutinases
- (d) Pectinases
Answer: Amylases
Q805. Pectolytic enzymes degrade __________.
- (a) Cellulose
- (b) Starch
- (c) Protein
- (d) Pectic substance ✅
Answer: Pectic substance
Q806. Cutinase enzyme degrades the _______ of cell wall in pathogenesis.
- (a) Cutin ✅
- (b) Pectin
- (c) Cellulose
- (d) Lipid
Answer: Cutin
Q807. Lipase enzyme degrades the _____ of cell wall in pathogenesis.
- (a) Lipids ✅
- (b) Cutin
- (c) Cellulose
- (d) Pectin
Answer: Lipids
Q808. Cellulose is degraded by_________ enzyme.
- (a) Amylases
- (b) Cellulases ✅
- (c) Cutinases
- (d) Pectinases
Answer: Cellulases
Q809. Lipid is degraded by_________ enzyme.
- (a) Amylases
- (b) Cellulases
- (c) Cutinases
- (d) Lipase ✅
Answer: Lipase
Role of Toxins, Growth Regulators and Polysaccharides
Q810. HS toxin is produced by____________.
- (a) Helminthosporium maydis
- (b) Helminthosporium carbonum
- (c) Alternaria alternata
- (d) Helminthosporium sacchari ✅
Answer: Helminthosporium sacchari
Q811. The piricularin toxin is produced by ___________.
- (a) Pyricularia oryzae ✅
- (b) Helminthosporium oryzae
- (c) Sclerotium oryzae
- (d) Sarocladium oryzae
Answer: Pyricularia oryzae
Q812. Which of the following toxins are host specific?
- (a) Tab toxin
- (b) HV toxin ✅
- (c) Pyricularin
- (d) None of the above
Answer: HV toxin
Q813. Which of the following growth regulators act as growth inhibitors?
- (a) Auxins
- (b) Cytokinin
- (c) Abscisic acid ✅
- (d) Gibberellin
Answer: Abscisic acid
Q814. Which of the following growth regulators act as growth promoting?
- (a) Ethylene
- (b) Abscisic acid
- (c) Dormin
- (d) Cytokinin/ Auxins /Gibberellins ✅
Answer: Cytokinin/ Auxins /Gibberellins
Q815. Indole-3-Acetic Acid (IAA) is the naturally occurring__________.
- (a) Auxins ✅
- (b) Ethylene
- (c) Abscisic acid
- (d) Dormin
Answer: Auxins
Q816. Which of the following growth regulator isolated from bakane or foolish seedling disease of rice?
- (a) Ethylene
- (b) Cytokinin
- (c) Gibberellins ✅
- (d) Auxins
Answer: Gibberellins
Q817. Which of the following growth regulator is involved in premature ripening of banana?
- (a) Ethylene ✅
- (b) Auxins
- (c) Cytokinin
- (d) Gibberellins
Answer: Ethylene
Q818. Which of the following growth regulator is continuously produced in young meristematic tissue of plant?
- (a) Ethylene
- (b) Auxins ✅
- (c) Cytokinin
- (d) Gibberellins
Answer: Auxins
Q819. Which of the following toxins is host specific?
- (a) Tab toxin
- (b) HS toxin ✅
- (c) Fusarial toxin
- (d) Ten toxin
Answer: HS toxin
Q820. Which of the following toxins is non-host specific?
- (a) Ten toxin ✅
- (b) HV toxin
- (c) HC toxin
- (d) HS toxin
Answer: Ten toxin
Plant Disease Epidemiology
Q821. Which of the following is a compound interest disease?
- (a) Damping -off
- (b) Vascular wilt
- (c) Stem rust of wheat ✅
- (d) None of the above
Answer: Stem rust of wheat
Q822. Wilt of castor is an example of __________ disease.
- (a) Simple interest ✅
- (b) Compound interest
- (c) Both (a) and (b)
- (d) None of the above
Answer: Simple interest
Q823. Which of the following disease of potato is mostly favoured by low temperature?
- (a) Early blight
- (b) Late blight ✅
- (c) Scab
- (d) Wart
Answer: Late blight
Q824. The wilt due to Fusarium oxysporum is a type of __________ disease.
- (a) Monocyclic ✅
- (b) Polycyclic
- (c) Polyetic
- (d) None of the above
Answer: Monocyclic
Q825. Primary inoculum of compound interest disease is________.
- (a) Seed-borne
- (b) Soil-borne
- (c) Air-borne ✅
- (d) None of the above
Answer: Air-borne
Q826. Primary inoculum of simple interest disease is_________.
- (a) Air-borne
- (b) Soil-borne ✅
- (c) Both (a) & (b)
- (d) None of the above
Answer: Soil-borne
Q827. Compound interest disease is__________.
- (a) Monocyclic
- (b) Polycyclic ✅
- (c) Both (a) & (b)
- (d) None of the above
Answer: Polycyclic
Q828. Simple interest disease is_________.
- (a) Monocyclic ✅
- (b) Polycyclic
- (c) Both (a) & (b)
- (d) None of the above
Answer: Monocyclic
Q829. Tyloses formation is observed in ______ disease development.
- (a) Vascular wilt ✅
- (b) Root rot
- (c) Foot rot
- (d) None of above
Answer: Vascular wilt
Principles of Plant Disease Management
Q830. Common name of Indofil M-45 is _________.
- (a) Mancozeb ✅
- (b) Carbendazim
- (c) Copper oxychloride
- (d) Propiconazole
Answer: Mancozeb
Q831. Which of the following fungicide is used as a tree wound dresser fungicide?
- (a) Bordeaux paste ✅
- (b) Propiconazole
- (c) Captan
- (d) None of the above
Answer: Bordeaux paste
Q832. Generally non-systemic fungicides are used in concentration of ________ %.
- (a) 1 to 2
- (b) 0.2 to 0.3 ✅
- (c) 0.025 to 0.05
- (d) 2 to 4
Answer: 0.2 to 0.3
Q833. Generally systemic fungicides are used in concentration of _____%.
- (a) 1 to 2
- (b) 1 to 2
- (c) 0.025 to 0.05 ✅
- (d) 0.025 to 0.05
Answer: 0.025 to 0.05
Q834. Emisan is _________containing fungicide.
- (a) Sulphur
- (b) Mercury ✅
- (c) Copper
- (d) None of above
Answer: Mercury
Q835. Bordeaux mixture is ________ containing fungicide.
- (a) Sulphur
- (b) Mercury
- (c) Copper ✅
- (d) None of above
Answer: Copper
Q836. When zinc is added to maneb, it forms ________.
- (a) Copper oxychloride
- (b) Mancozeb
- (c) Zineb ✅
- (d) Carbendazim
Answer: Zineb
Q837. Which of the following is an example of exclusion of inoculum.
- (a) Selection of field
- (b) Choice of geographical area ✅
- (c) Choice of time of sowing
- (d) Seed treatment
Answer: Choice of geographical area
Q838. Soil solarization is useful for the management of ______disease.
- (a) Seed-borne
- (b) Soil-borne ✅
- (c) Air-borne
- (d) None of the above
Answer: Soil-borne
Q839. Which of the following is an example of avoidance of the pathogen?
- (a) Seed treatment
- (b) Selection of field ✅
- (c) Crop rotation
- (d) Rouging
Answer: Selection of field
Q840. Preventing the inoculum from entering or establishing in the field or area where it does not exist is known as____________.
- (a) Avoidance
- (b) Eradication
- (c) Exclusion ✅
- (d) None of the above
Answer: Exclusion
Q841. Tobacco damping off disease is less when seed rate is ________.
- (a) High ✅
- (b) Low
- (c) Both (a) & (b)
- (d) None of the above
Answer: High
Q842. In India, Destructive Insects and Pests Act passed in________.
- (a) 1814
- (b) 1825
- (c) 1925 ✅
- (d) 1914
Answer: 1925
Q843. How many plant quarantine stations are in operation in India?
- (a) 06
- (b) 16
- (c) 26 ✅
- (d) 36
Answer: 26
Q844. Hot water treatment is useful for the management of________disease.
- (a) Seed-borne ✅
- (b) Soil-borne
- (c) Air-borne
- (d) None of the above
Answer: Seed-borne
Q845. Hot water treatment is used for controlling _________disease.
- (a) Early blight of potato
- (b) Tikka of groundnut
- (c) Red rot of sugarcane
- (d) All of the above ✅
Answer: All of the above
Q846. Wettable sulphur is generally used for the control of________disease.
- (a) Rust
- (b) Tikka disease of groundnut
- (c) Downy mildew
- (d) Powdery mildew ✅
Answer: Powdery mildew
Q847. Which of the following is heterocyclic nitrogenous compound fungicide?
- (a) Captafol
- (b) Copper oxychloride
- (c) Mancozeb
- (d) Propiconazole ✅
Answer: Propiconazole
Q848. Late blight of potato was introduced in India from____________ before enforcement of plant quarantine laws.
- (a) Phillippines
- (b) Europe ✅
- (c) Netherlands
- (d) Africa
Answer: Europe
Q849. Application of ____ reduces the club rot of cabbage by increasing soil pH to 8.5.
- (a) Sulphur
- (b) Nitrogen
- (c) Lime ✅
- (d) Potash
Answer: Lime
Q850. Application of ______ reduces the incidence of common scab of potato by reducing soil pH to 5.2.
- (a) Lime
- (b) Nitrogen
- (c) Sulphur ✅
- (d) Potash
Answer: Sulphur
Q851. Quarantine procedure is not effective for management of ________diseases.
- (a) Air-borne
- (b) Soil-borne ✅
- (c) Seed-borne
- (d) None of above
Answer: Soil-borne
Q852. Crop rotation is useful for the management of ______disease.
- (a) Seed-borne
- (b) Soil-borne ✅
- (c) Air-borne
- (d) None of the above
Answer: Soil-borne