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