Aspergillus flavus - Clinical and Vaccine Immunology - American
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Transcript of Seat No - WordPress.com · Web viewCollar rot of groundnut is caused by: (a) Rhizoctonia solani (b)...
DEPARTMENT OF PLANT PATHOLOGY
C.P.COLLEGE OF AGRICULTURE
SARDARKRUSHINAGAR
Fifth Semester, B.Sc.(Hons.) Agri.
Pl. Path. 5.3
Diseases of Field Crops and Their
Management
Sr.
No.
CROPS COVERED Per cent
weightage
1. WHEAT 14
2. SORGHUM 5
3. PEARLMILLET (BAJRA) 10
4. RICE 7
5. MAIZE 2
6. GROUNDNUT 10
7. CASTOR 5
8. MUSTARD 10
9. SESAMUM 1.5
10. SUNFLOWER 0.5
11. COTTON 9
12. SUGARCANE 9
13. TOBACCO 10
14. TURMERIC 1
15. PULSES (Red gram, Green gram, Black gram, Bengal gram)
5
16. SOYBEAN 0.5
17. RAGI 0.25
18. JETROPHA 0.25
TOTAL 100
DEPARTMENT OF PLANT PATHOLOGYC.P.COLLEGE OF AGRICULTURE
SARDARKRUSHINAGAR
Fifth Semester, B.Sc.(Hons.) Agri.Pl. Path. 5.3 Diseases of Field Crops and Their Management
OBJECTIVE QUESTIONS1. WHEAT ( 14% )
1. The alternate host of brown rust of wheat is __________. (a) Brassica sp (b) Thalictrum sp. (c) Berberis sp. (d) Brinjal
2. Karnal bunt of wheat is caused by _________.(a) Ustilago nuda (b) Ustilaginoidea virens(c) Tilletia indica (d) Ustilago scitaminae
3. Thy study of inter relation ship between a pathogen, environment and host is called as _________. (a) Epidemiology (b) Plant Pathology (c) Mycology (d) Epidermology
4. Solar heat treatment is used to control __________.(a) Smut of bajra (b) Smut of sorghum (c) Loose smut of wheat (d) None of above
5. The annual reoccurrence of rust of wheat (black rust) in the plains is through _________. (a) Telutospores (b) Basidiospores (c) Uredospores (d) Acieospores
6. Alternate host of black stem rust of wheat is ________. (a) Berberis sp. (b) Thalictrum sp.(c) Solanum sp. (d) None of above
7. Loose smut of wheat is a primarily _____.(a) Externally seed borne
disease (b) Internally seed borne disease
(c) Both a & b (d) None of above8. Brown rust of wheat is caused by _______.
(a) Puccinia siriiformis (b) Puccinia recondita (c) Puccinia graminis tritici (d) Ustilago tritici
9. The typical example of monocyclic disease is ________. (a) Loose smut of wheat (b) Sesame phyllody (c) Rice blast (d) Stem rust of wheat
10. Ear cockle of wheat is caused due to:(a) Alternaria triticina (b) Alternaria burnsi(c) Anguina tritici (d) Alternaria solani
11. Tundu disease of wheat is caused due to ________: (a) Anguina tritici &
Clavibacter tritici (b) Alternaria triticina
(c) Alternaria burnsi (d) Alternaria solani 12. Black stem rust of wheat is________ :
(a) Autoecious rust (b) Heteroecious rust (c) Autonomous rust (d) None of above
13. 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
14. An entity that can cause disease in known as _______ : (a) Sign (b) Disease (c) Pathogen (d) Host
15. 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
16. 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
17. Infective spore in barberry crop by black rust of wheat fungus is_________. (a) Uredospores (b) Basidiospores (c) Teliospores (d) Aeciospores
18. In stem rust of wheat pycniospore and aeciospore are produced on _______plant.(a) Wheat (b) Barberry(c) Oat (d) Rice
19. Mature teleutospore of wheat rust is _______. (a) Bicelled, binucleate (b) Bicelled, uninucleated(c) Unicelled, uninucleated (d) None of above
20. 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
21. 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
22. 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
23. Black, yellow and brown rust of wheat are generally caused by :(a) Puccinia spp. (b) Melampsora spp.(c) Uromyces spp. (d) Phragmidium spp.
24. Yellow ear rot of wheat is caused by :(a) Nematode (b) Bacteria
(c) Fungi (d) Both (a) & (b)25. The typical example of monocyclic disease is :
(a) Loose smut of wheat (b) Sesame phyllody(c) Rice blast (d) White rust of mustard
26. Brown rust of wheat is caused by :(a) Puccinia striiformis (b) Puccinia recondita(c) Puccinia graminis tritici (d) Ustilago tritici
27. First plant parasitic nematode was reported by….(a) N. A. Cobb (b) Prevost(c) T. Needham (d) F.C. Bawden
28. Tilletia causes disease in wheat crop :(a) Rust (b) Bunt(c) Smut (d) Downy mildew
29. The annual reoccurrence of rust of wheat (black rust) in the plains is through :(a) Uredospores (b) Aeciospores(c) Teleutospores (d) Basidiospores
30. Bacterial rot of wheat ears is also known as :(a) Spike blight (b) Tundu(c) Yellow slime disease (d) All above
31. 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
32. The loose smut of wheat fungus (Ustilago nuda var. tritici) survives as :(a) Basidiospores (b) Sclerotia(c) Dormant mycelium (d) All above
33. Tundu disease of wheat is caused by ________.(a) Nematode (b) Bacteria (c) Fungi (d) Both (a) & (b)
34. The contagious nature of wheat smut was shown by…(a) B.B. Mundakar (b) Anton de Berry(c) Prevost (d) J.F. Dastur
35. __________ is known as Father of Pathology.(a) Prevost (b) Anton de Berry(c) Alexander Fleming (d) K.C. Mehta
36. Mancozeb is traded as _______.(a) Bavistin (b) Indofil M-45(c) Kasugamycin (d) Kavach
37. Alternate host of black stem rust of wheat is ________. (a) Thalictrum sp. (b) Mahonia sp.(c) Solanum sp. (d) Sorghum
38. Alternaria leaf spot in wheat is caused by ________. (a) Alternaria solani (b) Alternaria poori(c) Alternaria alternata (d) Alternaria triticina
39. Ear cockle of wheat was reported by ______ in the year 1743.(a) N. A. Cobb (b) Prevost(c) F.C. Bawden (d) T. Needham
2. Sorghum ( 5% )
40. 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
41. Striga/Witchweed in sorghum is a_________: (a) Complete stem parasite (b) Partial stem parasite (c) Partial root parasite (d) Complete root parasite
42. Striga is a semi- root flowering parasite of __________. (a) Black gram (b) Sorghum (c) Green gram (d ) Chickpea
43. Partial root parasite of sorghum is ________. (a) Cuscuta (b) Striga (c) Orobanche (d ) None of above
44. State the name of fruiting body produced by Colletotrichum spp. _______. (a) Pycnidium (b) Perithecium (c) Acervulus (d ) Apothecium
45. The grain smut of sorghum is also known as :(a) Covered smut (b) Short smut(c) Kernel smut (d ) All above
46. Loose smut of sorghum is caused by_____.(a) Sphacelotheca sorghi (b) Tolyposporium ehrenbergii(c) Sphacelotheca cruenta (d ) Sphacelotheca reiliana
47. Long smut of sorghum is caused by_____.(a) Sphacelotheca sorghi (b) Tolyposporium ehrenbergii(c) Sphacelotheca cruenta (d ) Sphacelotheca reiliana
48. Head smut of sorghum is caused by_____.(a) Sphacelotheca sorghi (b) Tolyposporium ehrenbergii(c) Sphacelotheca cruenta (d ) Sphacelotheca reiliana
49. Sugary disease/ergot of sorghum is caused by_____.(a) Sphacelia sorghi (b) Tolyposporium ehrenbergii(c) Sphacelotheca cruenta (d ) Sphacelotheca reiliana
50. Anthrocnose of sorghum is caused by_____.(a) Colletotrichum capsici (b) Colletotrichum graminicola(c) Colletotrichum
lindemuthianum(d ) Colletotrichum falcatum
51. The botanical name of Striga/Witch weed is_________.(a) Striga parasitica (b) Striga densiflora(c) Striga asiatica (d ) All above
3. Bajara (Pearl millet) ( 10% )
52. The alternate host for pearl millet (bajra) rust is________. (a) Mustard (b) Tomato
(c) Okra (d) Brinjal 53. The primary source of inoculum of ergot of bajra survives as _________.
(a) Acervuli (b) Uredospore(c) Sclerotial bodies (d) Cleistothecia
54. Primary source of inoculum of downy mildew of bajra is carried out by_______.(a) Ascospores (b) Oospores(c) Zygospores (d) All of the above
55. Metalaxyl is traded as ________ : (a) Bavistin (b) Ridomil (c) Kasugamycin (d) Kavach
56. Rust of pearl millet is caused due to ________ : (a) Puccinia striformis (b) Puccinia penniseti (c) Puccinia recondita (d) Puccinia arachidis
57. Ergotin is produced by ________: (a) Colletotrichum falcatum (b) Claviceps fusiformis (c) Tolyposporium penicillariae (d) None of above
58. 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
59. 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
60. Causal organism of smut of bajra is ________. (a) Tolyposporium penicillariae (b) Sphacelotheca cruenta (c) Sphacelotheca reiliana (d) Ustilago nuda
61. Smut spores of bajra pathogen produces _______ which can cause secondary infection to flowers. (a) Basidiospore (b) Sporidia(c) Aeciospore (d) Oospore
62. 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
63. A group of diseases caused by basidiomycetes are :(a) Mildew (b) Rot(c) Smut (d) Ergot
64. The mode of infection in ergot of bajra is :(a) Shoot infection (b) Local infection of blossom(c) Seedling infection (d) Systemic infection
65. 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
66. Bajra smut disease infect the plant at :
(a) Seedling stage (b) Tillering stage(c) Flowering stage (d) None of above
67. Brinjal is an alternate host of ____.(a) Bajra rust (b) Mustard rust(c) Wheat rust (d) Sunflower rust
68. State the name of toxic substance produced by Claviceps fusiformis.(a) Fumaric acid (b) Fusaric acid(c) Ergotin (d) Alternaric acid
69. ________ pathogen is an obligate parasite of bajra. (a) Sclerospora graminicola (b) Albugo candida (c) Peronospora parasitica (d) Plasmporara viticola
70. 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
71. Claviceps fusiformis causes ______ disease in bajra crop.(a) Downy mildew (b) Smut(c) Rust (d) Ergot
72. Sclerospora graminicola causes ______ disease in bajra crop.(a) Downy mildew (b) Smut(c) Rust (d) Ergot
73. Tolyposporium penicillariae causes ______ disease in bajra crop.(a) Downy mildew (b) Smut(c) Rust (d) Ergot
74. Puccinia penniseti causes rust in which crop?(a) Rust of wheat (b) Rust of groundnut(c) Rust sunflower (d) Rust of bajra
4. Rice ( 7% )75. Deficiency of zinc in paddy is known as ______ disease.
(a) Mosaic (b) Khaira(c) Smut (d) Necrosis
76. 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
77. 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
78. Khaira disease of rice can be controlled by spraying _______. (a) Copper sulphate (b) Borax (c) Manganese sulphate (d) Zinc sulphate
79. False smut of paddy is caused due to________: (a) Ustilago nuda (b) Ustilago sciaminea (c) Ustilaginoidea virens (d) Ustilago avenae
80. Bronzing of paddy leaves is common symptom in __________. (a) Khaira disease (b) Foot rot (c) Mosaic (d) Brown leaf spot
81. Paddy blast pathogen survives on the collateral host such as ________. (a) Barberry (b) Brinjal (c) Triticum aestivum (d) Leersia hexandra
82. Which pathogen was responsible for the great Bengal famine in 1942 -43?(a) Pyricularia grisea (b) Helminthosporium oryzae(c) Ustilaginoidea virens (d) Xanthomonas oryzae
83. Deficiency of Zn in paddy causes __________. (a) Chlorosis (b) Necrosis (c) Mosaic (d) Smut
84. 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
85. Ustilaginoidea virens causes ____________ disease in rice.(a) Blast of paddy (b) Blight of paddy(c) False smut of paddy (d) Foot rot of paddy
86. Foot rot of paddy is caused by__________.(a) Helminthosporium oryzae (b) Ustilaginoidea virens(c) Xanthomonas oryzae (d) Fusarium moniliformae
87. Fusarium moniliformae causes ______ diseae in paddy.(a) Foot rot (b) Stem rot(c) Sheath rot (d) All above
5. Maize ( 2% )88. Charcoal rot symptoms in maize are produced by _________:
(a) Fusarium oxysporum (b) Melampsora lini(c) Macrophomina phaseolina (d) Sclerotium rolfsii
89. 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
90. Primary source of inoculum of charcoal rot of maize is ________. (a) Sclerotia (b) Oosopre(c) Chlamydospore (d) Zoosopre
91. Macrophomina phaseolina causes disease in maize is known as_______.(a) Soft rot (b) Ear rot(c) Charcoal rot (d) Top rot
92. 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
6. Groundnut ( 10% )93. Bud necrosis of groundnut is transmitted by __________.
(a) Frankliniella schultzei (b) Scirtothrips dorsalis (c) Both a and b (d) Myzus persicae
94. 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
95. Which fungus is producing aflatoxin in groundnut ________? (a) Claviceps fusiformis (b) Aspergillus flavus (c) Fusarium oxysporum (d) Aspergillus niger
96. Ground nut bud necrosis virus is transmitted by _______: (a) Thrips (b) Aphids (c) Mites (d) Bugs
97. Only one disease cycle occurring per season is:(a) Polycyclic disease (b) Polyetic disease(c) Multiple cycle disease (d) Monocyclic
98. Tikka disease of groundnut is caused by _______.(a) Colletotrichum spp. (b) Verticillium spp. (c) Fusarium spp. (d) Cercospora spp.
99. Ground nut chlorosis is caused due to the deficiency of ________ : (a) Iron (b) Boron (c) Zinc (d) Manganase
100. Bud necrosis of groundnut is transmitted by __________. (a) Bemisia tabaci (b) Frankliniella schultzei(c) Aphis gossypii (d) None of the above
101. Collar rot of groundnut is caused by:(a) Rhizoctonia solani (b) Aspergillus niger(c) Aspergillus flavus (d) Fusarium oxysporum
102. 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
103. Stem rot of groundnut is caused by:(a) Sclerotium rolfsii (b) Aspergillus niger(c) Cercospora arachidicola (d) Fusarium oxysporum
104. Stem rot of groundnut pathogen survives in the form of… (a) Oospores (b) Sclerotia(c) Chlamydospores (d) Conidia
105. Groundnut rust is ___________ .(a) Autonomus rust (b) Autoecious rust (c) Heteroecious rust (d) None of the above
106. Which nematode is infecting groundnut crop.?.(a) Anguina tritici (b) Rotylenchus reniformis (c) Meloidogyne arenaria (d) Pratylenchus coffeae
107. Groundnut bud necrosis is caused by ______ virus.(a) Phytoplasma (b) Nicotiana virus -1(c) Nicotiana virus -10 (d) Tomato spotted wilt virus
108. 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
109. Rust of groundnut is caused by_________.(a) Puccinia recondita (b) Puccinia avenae(c) Puccinia arachidis (d) Puccinia graminis
7. Castor ( 5% )110. State the name of toxic substance produced by Fusarium spp ______.
(a) Fumaric acid (b) Fusaric acid (c) Alternaric acid (d) Ergotin
111. Wilt of castor/cotton pathogen overwinters by forming resting spores ___ . (a) Chlamydospres (b) Blastospores (c) Zygospores (d) Arthrospores
112. 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
113. Wilt of castor caused by Fusarium oxysporum f.sp. ricini produces _____. (a) Macroconidia (b) Microconidia (c) Chlamydospores (d) All of the above
114 Flooding is the effective method to control :(a) Fusarium spp. (b) Phytophthora spp.(c) Pythium spp. (d) Xanthomonas sp.
115. Root rot of castor is caused by ____.(a) Fusarium oxysporum (b) Macrophomina phaseolina(c) Alternaria ricini (d) Cercospora ricini
116. 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
117. Alternaria leaf spot/blight in castor is caused by___________.(a) Alternaria alternata (b) Alternaria sesami(c) Alternaria solani (d) Alternaria ricini
8. Mustard ( 10% )118. Downy mildew of mustard is caused by __________.
(a) Plasmopara viticola (b) Claviceps fugiformis(c) Peronospora parasitica (d ) Sclerospora graminicola
119. White rust fungus 'Albugo candida' belongs to _______. (a) Basidiomycetes (b) Deuteromycetes (c) Ascomycetes (d) Oomycetes
120. Primary sources of inoculum of white rust of mustard survives as _______. (a) Ascospore (b) Oospore (c) Zoospore (d) Conidia
121. White rust of mustard is caused by _______: (a) Puccinia graminis var tritici (b) Puccinia arachidis (c) Puccinia recondita (d) Albugo crucifearum
122. Which of the following is a pseudo-rust ?(a) Black rust (b) Yellow rust
(c) Brown rust (d) White rust 123. 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
124. 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
125. Primary sources of inoculum of downy mildew of mustard survives as: _______. (a) Oospore (b) Zygospore(c) Aeciospre (d) Uredospore
126. Hypertrophy symptoms in mustard are produced by________ disease.(a) White rust (b) Alternaria blight(c) Powdery mildew (d) All above
127. Abnormal increase in the size of cells is termed as____.(a) Hypertrophy (b) Hyperplasia(c) Hypoplastic (d) Hypoplasia
128. 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
129. Hypertrophy symptoms in mustard are produced by________ disease.(a) Stem rot (b) Alternaria blight(c) Powdery mildew (d) Downy mildew
130. Alternaria blight in mustard is caused by________.(a) Alternaria solani (b) Alternaria alternata(c) Alternaria brassicae (d) Alternaria porri
9. Sesamum ( 1.5% )131. Sesamum phyllody is caused by ________ :
(a) Bacteria (b) Virus (c) Phytoplasma (d) Fungi
132. Sesamum phyllody is transmitted by _____________.(a) Aphids (b) Thrips(c ) Jassid (d) Whitefly
133. Floral parts of sesamum are transformed into leafy structure in _____. (a) Cercospora leaf spot (b) Powdery mildew (c) Sesamum phyllody (d) Phytophthora blight
134. Sesamum phyllody is transmitted by _____________. (a) Aphis craccivora (b) Thrips tabaci (c) Bemisia tabaci (d) Orosius albicinctus
135. 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
136. Powdery mildew of sesamum is caused by______. (a) Erysiphe polygoni (b) Erysiphe graminis(c) Erysiphe cichoracearum (d) Erysiphe graminis var.tritici
10. Sunflower ( 0.5% )137. Sunflower rust is _________.
(a) Autonomus rust (b) Autoecious rust (c) Heteroecious rust (d) None of the above
138. Causal organism of sunflower rust is:(a) Puccinia helianthi (b) Puccinia arachidis (c) Puccinia recondita (d) Puccinia striformis
139. Alternaria leaf spot in sunflower is caused by_______.(a) Alternaria carthami (b) Alternaria helianthi(c) Alternaria brassicae (d) Alternaria sesami
11. Cotton ( 9% )140. Alternaria leaf spot of cotton is caused due to _______:
(a) Alternaria alternata (b) Alternaria macrospora (c) Alternaria ricini (d) Alternaria solani
141. Pycnidial stage of Rhizoctonia balaticola causing root rot of cotton is ___. (a) Gomerclla tucumanensis (b) Macrophomina phaseolina (c) Rhizoctonia solani (d) Fusarium solani
142. Grey mildew of cotton is caused by ___________. (a) Albugo candida (b) Erysiphe cichoracearum (c) Rumularia areola (d ) Ustilago nuda
143. 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
144. The wilt of cotton is :(a) Seed borne (b) Soil borne(c) Both a & b (d) Air borne
145. Which fungal biocontrol agent is effective against soil borne plant pathogenic fungi?(a) Trichograma sp. (b) Trichoderma sp.(c) Paecilomyces sp. (d) Sclerotium sp.
146. Angular leaf spot of cotton is caused by..(a) Fungi (b) Bacteria(c) Virus (d) Nematode
147. Black arm of cotton is caused by ______.(a) Fusarium oxysporum f. sp.
vasinfectum (b) Xanthomonas auxonopodis pv.
malvacearum(c) Rhizoctonia bataticola (d) Meloidogyne javanica
148. Rumularia areola is causing _________ disease in cotton.(a) Wilt (b) Powdery mildew(c) Root rot (d) Grey mildew
149. ________ soil is favourable for root rot disease in cotton.(a) Sandy soil (b) Heavy black soil(c) Black soil (d) Light black soil
150. ________ soil is favourable for wilt disease in cotton.(a) Sandy soil (b) Heavy black soil(c) Clay soil (d) Sandy clay soil
151. Fusarium oxysporum is producing _________ resting spores.(a) Oospores (b) Cleistothecia(c) Chlamydospores (d) Sclerotia
152. Rhizoctonia bataticola is producing _______ resting structure.(a) Chlamydospores (b) Cleistothecia(c) Oospores (d) Sclerotia
153. Bark shredding of infected roots occurs due to ______ disease in cotton.(a) Wilt (b) Grey mildew(c) Root rot (d) Angular leaf spot
154. In______ disease of cotton infection confined in vascular system.(a) Grey mildew (b) Root rot(c) Angular leaf spot (d) Wilt
12. Sugarcane ( 9% )155. Grassy shoot of sugarcane is transmitted by _______ aphid.
(a) Longiunaguis sacchari (b) Melanapsis indosacchari (c) Aphis maidis (d) All of the above
156. The perfect stage of Colletotrichum falcatum infecting sugarcane red rot is ________. (a) Rhizoctonia bataticola (b) Colletotrichum gossypii(c) Glomerella tucumanensis (d) Glomerella cingulata
157. 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
158. Sugarcane mosaic virus is transmitted by _________.(a) Rhopalosiphum maidis (b) Myzus persicae(c) Bemisia tabaci (d) All of the above
159. Fruiting body produced by Colletotrichum falcatum is _______. (a) Pycnidium (b) Perithecium (c) Acervulus (d) Apothecium
160. The whip smut of sugarcane is caused by ________ .(a) Ustilago hordei (b) Ustilago nuda (c) Ustilago scitaminea (d) Ustilago maydis
161. 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
162. Grassy shoot disease of sugarcane is caused by________. (a) Fungi (b) Bacteria(c) Phytoplasma (d) Nematode
163. Grassy shoot of sugarcane is transmitted by _________: (a) Mites (b) Aphids (c) Thrips (d) Jassids
164. Central shoot is replaced by a whip like structure in smut of __________. (a) Bajra (b) Rice (c) Sugarcane (d) Maize
165. 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
166. Sugarcane mosaic virus is transmitted by _________.(a) Aphids (b) Thrips(c) Mites (d) Whitefly
167. The red rot of sugarcane is caused by__________.(a) Colletotrichum graminicola (b) Colletotrichum capsici(c) Colletotrichum falcatum (d) Colletotrichum lindemuthianum
168. The wilt of sugarcane is caused by__________.(a) Fusarium oxysporum (b) Fusarium moniliforme(c) Fusarium udum (d) Fusarium cubense
169. Ustilago scitaminea causes _________ disease in sugarcane.(a) Rust (b) Wilt(c) Smut (d) Red rot
13. Tobacco ( 10% )170. Formation of giant cell is common line host-pathogen by____.
(a) Virus (b) Root -knot nematode (c) Fungi (d) mycoplasma
171. Central Tobacco Research Institute is situated in ___________.(a) Anand (b) Assam (c) Rajmundri (d) Akola
172. Leaf curl of tobacco is transmitted by.(a) Thrips (b) Aphid(c) Whitefly (d) All above
173. Leaf curl of tobacco is caused by________. (a) Nicotiana virus -1 (b) Nicotiana virus -10(c) Phytoplasma (d) Viroid
174. Frog-eye leaf spot disease is observed in _______. (a) Tobacco (b) Cotton (c) Mustard (d) Sorghum
175. 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
176. Carbofuran is used for the control of _________: (a) Fungi (b) Bacteria (c) Plant parasitic nematodes (d) None of the above
177. Broom Rape/Orobanche infecting tobacco crop is a _______ : (a) Partial root parasite (b) Partial stem parasite (c) Complete root parasite (d) Complete stem parasite
178. 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
179. The sexually produced spores by Pythium spp. is known as ______ : (a) Zoospores (b) Arthrospores (c) Zygospores (d) Oospores
180. Root knot nematode favours the soil such as __________. (a) Clay and loamy soil (b) Black soil(c) Sandy soil (d) Heavy black soil
181. Soil solarization is recommended for the management of ___________. (a) Nematode (b) Virus (c) Bacteria (d) Viroides
182. 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
183. 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
184. Root knotting in tobacco crop is caused by________.(a) Anguina tritici (b) Meloidogyne incognita (c) Meloidogyne arenaria (d) Rotylenchus reniformis
185. Complete root parasite of tobacco is ________.(a) Cuscuta (b) Striga(c) Loranthus (d) Orobanche
186. Which fungus is associated with root knot infection?(a) Alternaria sp. (b) Fusarium sp.(c) Helminthosporium sp. (d) Erysiphe sp.
187. The term necrosis indicates….(a) Blightening (b) Curling(c) Death of cells (d) Hypertrophy
188. Tobacco mosaic is caused by________. (a) Nicotiana virus -1 (b) Nicotiana virus -10(c) Phytoplasma (d) Viroids
189. Root knot nematode can be managed by…..(a) Carbendazim (b) Thirum(c) Carbofuran (d) Mancozeb
190. Rabbing with bajra/paddy husk @ 7kg/m2 is highly effective for_______.(a) Virus (b) Bacteria
(c) Viroides (d) Nematodes191. 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
192. Brown leaf spot of tobacco is caused by________. (a) Alternaria alternata (b) Alternaria burnsii(c) Alternaria solani (d ) Alternaria brassicae
193. Cercospora nicotianae causes ___ disease in tobacco crop.(a) Brown leaf spot (b) Root knotting(c) Damping off (d) Frog eye leaf spot
194. Alternaria alternata causes ______ disease in tobacco crop.(a) Brown leaf spot (b) Root knotting(c) Damping off (d) Frog eye leaf spot
195. Pythium aphanidermatum causes _________ disease in tobacco crop.(a) Brown leaf spot (b) Root knotting(c) Damping off (d) Frog eye leaf spot
196. Damping off of tobacco is caused by________.(a) Alternaria alternata (b) Cercospora nicotianae(c) Meloidogyne incognita (d) Pythium aphanidermatum
197. Leaf curl of tobacco is transmitted by..(a) Thrips tabaci (b) Bemisia tabaci(c ) Aphis gossypii (d) Myzus persicae
14. Turmeric ( 1% )198. Rhizome rot pathogen of turmeric is transmitted to farthest distance by__ :
(a) Air (b) Insects (c) Rhizome (d) None of the above
199. Leaf blotch/brown leaf spot of turmeric is caused by ________. (a) Colletotrichum falcatum (b) Glomerella tucumanensis (c) Taphrina maculans (d) Colletotrichum gloeosporioides
200. Ca-69 is a resistant variety against _________. (a) Turmeric leaf blotch (b) Wheat loose smut (c) Sugarcane red-rot (d) Blackgram anthracnose
201. Rhizome rot of turmeric is caused by________. (a) Pythium aphanidermatum (b) Pythium myriotylum(c) Pythium graminicolum (d) All above
202. Pythium aphanidermatum causes _________ disease in turmeric.(a) Leaf blotch (b) Rhizome rot(c) Leaf spot (d) Powdery mildew
203. Taphrina maculans causes _________ disease in turmeric.(a) Leaf blotch (b) Rhizome rot(c) Leaf spot (d) Downy mildew
204. Leaf spot of turmeric is caused by ________.(a) Colletotrichum capsici (b) Colletotrichum gloeosporioides
(c) Colletotrichum curcumae (d) All above205. Colletotrichum capsici causes _______ disease in turmeric.
(a) Leaf blotch (b) Rhizome rot(c) Leaf spot (d) Root knotting
15. Pulses (Red gram, Green gram, Black gram, Bengal gram) (5%)206. Which of the following disease of pigeonpea is caused by virus______?
(a) Wilt (b) Stem canker (c) Sterility mosaic (d) Leaf spot
207. Pigeonpea sterility mosaic disease is transmitted by _______. (a) Aphids (b) Whitefly (c) Eriophyid mite (d) Jassids
208. Yellow mosaic virus of green gram is transmitted by ____________.(a) Aphis craccivora (b) Thrips tabaci (c) Orosius albicinctus (d) Bemisia tabaci
209. Mungbean yellow mosaic virus is transmitted by ________: (a) Aphid (b) Leaf hoppers (c) Whitefly (d) Thrips
210. ‘Mosaic’ is the specific symptoms produced by:(a) Phytoplasma (b) Fastidious vascular bacteria(c) Viroid (d ) Virus
211. 2000 ppm = _______ gm/litre of water.(a) 0.2 gm (b) 2 gm(c) 20 gm (d) 200 gm
212. Leaf crinkle disease of black gram is transmitted by________. (a) White fly (b) Jassid (c) Aphid (d) Thrips
213. 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
214. Leaf crinkle disease of black gram (Urdbean) is transmitted by ________. (a) Seed (b) Whitefly (c) Sap (d) All of the above
215. Powdery mildew pathogen is __________ in nature. (a) Obligate parasite (b) Facultative parasite (c) Saprophyte (d) None of the above
216. Powdery mildew pathogen requires favourable condition as ___________. (a) Very high humidity (b) Low humidity (c) Very low humidity (d) None of the above
217. Erysiphe polygoni produces__________ structure and perpetuate in infected plant debris. (a) Macroconidia (b) Zoospore(c) Cleistothecia (d) Chlamydospores
218. Chickpea stunt disease is caused by _________.
(a) Fungi (b) Bacteria (c) Virus (d) Phytoplasma
219. 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
220. Chickpea blight is caused by ___________.(a) Pyricularia oryzae (b) Ascochyta rabiei (c) Aspergillus flavus (d) Colletotrichum falcatum
221. 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
222. Wilt of pigeonpea is caused by _______.(a) Fusarium udum (b) Fusarium vasinfectum(c) Fusarium moniliforme (d) Fusarium gramineum
223. Stem blight/stem canker of pigeonpea is caused by _______.(a) Phytophthora infestans (b) Phytophthora drechsleri(c) Phytophthora citrophthora (d) Phytophthora palmivora
224. Anthracnose of black gram (Urdbean) is caused by _______.(a) Colletotrichum capsici (b) Colletotrichum falcatum(c) Colletotrichum
lindemuthianum(d) Colletotrichum curcumae
16. Soybean ( 0.5% )225. Soybean stem rot is caused by ________.
(a) Fusarium oxysporum (b) Sclerotinia sclerotiorum (c) Claviceps fusiformis (d) Rhizoctonia bataticola
226. The vector infecting soybean mosaic can be controlled by the spray of _______.(a) Thiophanate methyl (b) Thiram (c) Streptocycline (d) Methyl -o-demeton
227. Phakopsora pachyrhizi fungus is causing rust disease in ________. (a) Bajra (b) Groundnut (c) Wheat (d) Soybean
228. Soybean rust is caused by _________.(a) Phakospora pachyrhizi (b) Puccinia arachidis (c) Puccinia pennisetti (d) Puccinia graminis
229. Soybean mosaic is transmitted by _________.(a) Aphids (b) Jassids(c) White fly (d) Thrips
17. Ragi ( 0.25% )230. Blast in ragi is caused by________ .
(a) Remularia areola (b) Pyricularia grisea
(c) Alternaria alternata (d) Claviceps fisiformis
18. Jetropha ( 0.25%)231. Mosaic of jatropha is transmitted by ________.
(a) Aphid (b) Mite (c) Thrips (d) White fly
232. Root and stem rot in jatropha is caused by ________: (a) Pythium & Phytophthora
spp.(b) Ramularia areola
(c) Aspergillus niger (d) Alternaria alternata