MCQ on
Diseases of Field and Horticultural Crops and their Management-II
|
Question
1. What is the causal organism of
Black Rust of wheat? A. Puccinia graminis B. Puccinia recondita C. Puccinia striformis D. Puccinia tritici E. All of them
2. The yellow rust of wheat is
caused by A. Puccinia graminis B. Puccinia recondita C. Puccinia striformis D. Puccinia tritici E. None of them
3. Puccinia recondita causes wheat
disease named as A. Powdery mildew B. Yellow rust C. Brown rust D. Downy mildew E. White rust
4. Glomerella tucumanensis
/Colletotrichum falcatum causes A. Red root of sugarbeet B. Red root of sugarcane C. Red rot of sugarbeet D. Red rot of sugarcane E. Red rot of wheat
5. Albugo candida causes disease
in A. Gram B. wheat C. Mustard D. Pea E. Rye
6. Ustilago tritici causes A. white rust B. loose smut of barley C. rust of wheat D. loose smut of rice E. loose smut of wheat
7. Smut disease in sugarcane is
caused by A. Sporisorium scitamineum B. Glomerella tucumanensis C. Colletotrichum falcatum D. Fusarium sacchari E. Anguina tritici
8. Tilletia indica is the synonym
to fungus A. Albugo candida B. Neovosia indica C. Puccinia graminis D. Puccinia recondita E. Puccinia striformis
9. Fusarium sacchari causes
disease in A. Wheat B. Rice C. Sugarbeet D. Sugarcane E. Mustard
10. Albugo candida causes A. Black rust B. Yellow rust C. Brown rust D. White rust E. Green rust
11. Peronospora parasitica is a A. Downy mildew causing fungi B. Downy mildew causing Bacteria C. Downy mildew causing virus D. Downy mildew causing viroid E. Downy mildew causing algae
12. Powdery mildew in wheat is
caused by A. Puccinia graminis B. Blumeria graminis f. sp.
tritici C. Ustilago tritici D. Erysiphe graminis E. Neovosia indica
13. The causal organism of
Alternaria blight in wheat is A. Puccinia graminis B. Blumeria graminis f. sp.
tritici C. Ustilago tritici D. Erysiphe graminis E. Alternaria triticina
14. Fusarium sacchari causes
sugarcane disease A. Wilt B. Smut C. Wart D. Rust E. Blight
15. Sclerotinia stem rot of mustard
is caused by A. Sporisorium scitamineum B. Sclerotinia sclerotiorum C. Sclerotinia saccari D. Sclerotinia indica E. Sclerotinia xyli
16. Anguina tritici causing ear cockle disease in wheat is a A. Fungus B. Bacteria C. Nematode D. Virus E. Algae
17. Grassy shoot of sugarcane is
caused by A. Blumeria graminis f. sp.
tritici B. Candidatus Phytoplasma sacchari C. Alternaria triticina D. Neovosia indica E. Sporisorium scitamineum
18. Wilt in gram is caused by A. Fusarium oxysporum f.Sp. ciceri B. Fusarium sacchari C. Fusarium moniliformii D. Fusarium indica E. all of them
19. Ratoon stunting is a disease of A. Wheat B. Banana C. Sugarcane D. Rice E. Gram
20. Anthracnose in cotton is caused
by A. Colletotrichum gossypii B. Botrytis cineria C. Candidatus Phytoplasma sacchari D. Blumeria graminis f. sp.
tritici E. Sporisorium scitamineum
21. Fusarium oxysporum f. sp.
Vasinfectum causes A. Leaf wilt B. Stem wilt C. Stomata wilt D. root wilt E. Vascular wilt
22. Black arm of cotton is due to A. Bacterium gosipii B. Bacterium malvacearum C. Bacterium malvacea D. Neovosia indica E. Colletotrichum malvacearum
23. The causal organism of Downy
mildew in pea is A. Peronospora viciae B. Peronospora parasitica C. Peronospora peronospori D. Colletotrichum malvacearum E. Fusarium sacchari
24. The causal organism of Powdery
mildew in pea is A. Alternaria triticina B. Neovosia indica C. Sporisorium scitamineum D. Erysiphe pisi E. Bacterium malvacearum
25. Uromyces fabae causes A. Wilt B. Rust C. Bunt D. Smut E. None of them
26. Uromyces fabae causes disease in A. Wheat B. Pea C. Sugarcane D. Rice E. Gram
27. Anthracnose in Mango is caused
by A. Colletotrichum gloeosporioides
var minor B. Colletotrichum malvacearum C. Sporisorium scitamineum D. Sclerotinia sclerotiorum E. Sclerotinia saccari
28. Colletotrichum gloeosporioides
var minoris also known as A. Alternaria triticina B. Neovosia indica C. Glomerella cingulata var minor D. Sclerotinia sclerotiorum E. Sclerotinia saccari
29. Mango malformation is caused by A. Colletotrichum gloeosporioides
var minor B. Colletotrichum malvacearum C. Sporisorium scitamineum D. Fusarium mangiferae E. Fusarium sacchari
30. Pseudomonas syringae pv.
Syringae is a A. Fungus B. Virus C. Bacteria D. Algae E. Mushroom
31. Pseudomonas syringae pv.
Syringae causes A. Anthracnose B. Rust C. Bacterial blight D. Wilt E. Smut
32. Oidium mangiferaeis a causes
disease in A. Mango B. Strawberry C. Litchi D. Grapes E. Papaya
33. Canker is a deadly disease of A. Lemon B. Strawberry C. Litchi D. Grapes E. Papaya
34. Phytophthora citrophthora
causes A. Blight B. Gummosis C. Anthracnose D. Rust E. Bacterial blight
35. Downy mildew of grapes is
caused due to A. Xanthomonas citri subsp. citri B. Xanthomos citri C. Plasmopara viticola D. Colletotrichum malvacearum E. Sporisorium scitamineum
36. Which one is not a powdery
mildew causing fungus A. Erysiphe necator B. Uncinula necator C. Podosphaera leucotricha D. Sphaerotheca fuliginea E. Xanthomonas citri subsp. Citri
37. Erysiphe necatoris also known
as A. Alternaria triticina B. Uncinula necator C. Podosphaera leucotricha D. Sphaerotheca fuliginea E. Xanthomonas citri subsp. Citri
38. Uncinula necatorcan be found on
the plants of A. Mango B. Strawberry C. Litchi D. Grapes E. Papaya
39. Fusarium oxysporum f. sp.
Vasinfectum causes disease in A. Wheat B. Cotton C. Sugarcane D. Rice E. Gram
40. Pseudomonas syringae pv.
Syringae causes disease in A. Wheat B. Cotton C. Sugarcane D. Rice E. Mango
41. Oidium mangiferaeis a causal
organism of A. Anthracnose B. Rust C. Powdery mildew D. Wilt E. Smut
42. Citrus canker is caused by A. Xanthomonas citri subsp. citri B. Xanthomos citri C. Xanthomonas lemon subsp. citri D. Neovosia indica E. Glomerella cingulata var minor
43. Pathogen causing Anthracnose in
grape vine plant is A. Erysiphe necator B. Uncinula necator C. Podosphaera leucotricha D. Elsinoe ampelina E. Xanthomonas citri subsp. Citri
44. Scab is the deadly disease of A. Mango B. Strawberry C. Apple D. Grapes E. Papaya
45. Scab is the deadly disease
caused by A. Erysiphe necator B. Venturia inaequalis C. Podosphaera leucotricha D. Elsinoe ampelina E. Xanthomonas citri subsp. Citri
46. Which of the disease occurs in
Apple A. Canker B. Khaira C. Powdery mildew D. Malformation E. All of them
47. Podosphaera leucotricha is a
fungus causing A. Canker B. Khaira C. Powdery mildew D. Malformation E. All of them
48. Fire Blight disease in apple is
caused by pathogen A. Venturia inaequalis B. Podosphaera leucotricha C. Elsinoe ampelina D. Erwinia amylovora E. Erysiphe necator
49. Crown gall disease is caused by A. Venturia inaequalis B. Podosphaera leucotricha C. Elsinoe ampelina D. Erwinia amylovora E. Agrobacterium tumefaciens
50. Rhizobium radiobacteris also
known as A. Venturia inaequalis B. Xanthomonas citri subsp. citri C. Xanthomos citri D. Xanthomonas lemon subsp. citri E. Agrobacterium tumefaciens
51. Leaf curl caused by Taphrina deformans is a pathogen of A. Citrus B. Apple C. Peach D. Mango E. Grapes
52. Strawberry leaf spot is the
disease caused by A. Agrobacterium tumefaciens B. Mycospharella fragariae C. Venturia inaequalis D. Xanthomonas citri subsp. citri E. Podosphaera leucotricha
53. Early blight and late blight
are the disease of A. Sweat potato B. Potato C. Turmeric D. Ginger E. All of them
54. Pathogen of Early blight of
potato is A. Alternaria solani B. Phytophthora infestans C. Rhizoctonia solani D. PLRV E. PVY
55. Pathogen of Late Blight of
potato is A. Alternaria solani B. Phytophthora infestans C. Rhizoctonia solani D. PLRV E. PVY
56. Which fungus forms the sclerotia A. Erwinia amylovora B. Agrobacterium tumefaciens C. Rhizoctonia solani D. PLRV E. PVY
57. Rhizoctonia solani causes A. Black scurf in potato B. Late blight C. Early blight D. Leaf curl E. Chorosis
58. PLRV stands for A. Potato lightroll virus B. Potato light red variety C. Potato littleroll virus D. Potato leafroll virus E. Potato leaf red variety
59. The full form of PVY is A. Potato Variety Y B. Plum variety Y C. Plum Virus Y D. Peach virus Y E. Potato Virus Y
60. Causal organism of Potato leaf
roll is A. Potato leafroll fungus B. Potato leafroll Bacteria C. Potato leafroll algae D. Potato leafroll virus E. Potato leafroll mushroom
61. Causal organism of Potato
mosaic is A. PMY B. PMV C. Potato mosaic virus D. Potato leafroll virus E. Potato Virus Y
62. Which of the disease is not of
cucurbits A. Powdery mildew B. Downy mildew C. Wilt D. Chlorosis E. Khaira
63. Which one is not the causal
organism of cucurbits powdery mildew is A. Sphaerotheca fuliginea B. Podosphaera xanthii C. Erysiphe cichoracearum D. Pseudoperonospora cubensis E. Golovinomyces cichoracearum
64. Identify the pathogen that
causes Downy mildew in cucurbits A. Pseudoperonospora cubensis B. Golovinomyces cichoracearum C. Sphaerotheca fuliginea D. Podosphaera xanthii E. Erysiphe cichoracearum
65. Erwinia tracheiphila is the
causal organism of A. Powdery mildew B. Downy mildew C. Wilt D. Chlorosis E. Khaira
66. Alternaria porri (Ellis)
Cif. Causes disease Purple blotch in A. Garlic B. Onion C. Potato D. Onion and garlic E. None of them
67. Pathogen identified for
Stemphylium blight in onion is A. Stemphylium vesicarium B. Stemphylium allium C. Stemphylium vesica D. Stemphylium alleopropile E. All of them
68. The incurable disease of
chillies is A. Powdery mildew B. Downy mildew C. Wilt D. Chlorosis E. Leaf curl
69. Leaf curl in chillies caused by
virus A. Potato Virus Y B. Chilli leaf curl virus C. Chilli leafroll virus D. PMY E. PMV
70. Begomo virus belongs to sub
group A. Biminivirus B. Bgemvirus C. Bigeminivirus D. Begomovirus E. None of them
71. In turmeric Taphrina maculans causes A. Leaf roll B. Leaf spot C. Leaf streaks D. Leaf anthacnose E. Little leaf
72. Stem gall of corriender is
caused by A. Protomyces macrosporus B. Pseudoperonospora cubensis C. Golovinomyces cichoracearum D. Sphaerotheca fuliginea E. Podosphaera xanthii
73. From blighted marigold the
pathogen isolated may be A. Stemphylium allium B. Stemphylium vesica C. Stemphylium alleopropile D. Botrytis cinerea E. Protomyces macrosporus
74. Diplodia rosarum causes A. Powdery mildew B. Downy mildew C. Wilt D. Dieback E. Black leaf spot
75. Powdery mildew in rose is
caused by A. Podosphaera pannosa B. Protomyces macrosporus C. Podosphaera xanthii D. Pseudoperonospora cubensis E. All of them
76. Pathogen associated with Black
leaf spot of rose is A. Podosphaera pannosa B. Diplocarpon rosae C. Bigeminivirus D. Begomovirus E. Botrytis cinerea
77. Ratoon stunting is a disease
caused by A. Leifsonia xyli subsp.
xyli B. Blumeria graminis f. sp.
tritici C. Candidatus Phytoplasma sacchari D. Neovosia indica E. Sporisorium scitamineum
78. Alternaria brassicae
(Berk.) Sacc.causes disease in A. Wheat B. Mustard C. Gram D. Pea E. Mango
79. Wilt disease in lentil is
caused by A. Fusarium oxysporum f.Sp. ciceri B. Fusarium oxysporum f. sp.
lentis C. Fusarium oxysporum f. sp.
Fusiformi D. Fusarium oxysporum f. sp.
Vasinfectum
80. The alternate host of wheat
rust is A. Sugarcane B. Oat bushes C. Barberry bushes D. Barbadose bushes E. Rice plants
81. K.C Mehta, a renound plant
pathologist is associated with A. Rust in pea B. Rust in rice C. Rust of linseed D. Rust in wheat E. Rust of mustard
82. Vector of Chilli leaf curl
virus is A. Bemisia tabaci B. Blumeria tabaci C. Leifsonia tabaci D. Bemisia chilli E. Botrytis
tabaci
83. Pathogen identified to cause
maximum plant disease is A. Virus B. Bacteria C. Fungus D. Algae E. Virus and bacteria
84. Red rot resistant varieties of
sugarcane are A. CO 62198 B. CO 62198, CO 7704 C. CO 7704 D. CO4 62198, CO 77044 E. CO 6198, CO 704
85. Identify the disease in which
central shoot is converted into a long whip-like, dusty black structure 1. Smut in sugarcane 2. Rust in sugarcane 3. Black mould in sugarcane 4. Bunt in sugarcane 5. All of them
86. Teliospores causing smut in
sugarcane may survive in the soil for long period 1. 8 years 2. 2 years 3. 10 years 4. 50 years 5. 1 year
87. For sugarcane smut the plant like Saccharum spontaneum, S. robustum,
Sorghum vulgare, Imperata arundinacea and Cyperus dilatatus act as A. Primary host B. Better host C. Repelent host D. Collateral host E. Future host
88. The response of Sugarcane
varieties COC 85061 and COC 8201 towards smut pathogen are A. Tolerant B. Moderately resistant C. Highly resistant D. Resistant E. Susceptible
89. If chilli is grown in nearby
fields or used in crop rotation with turmeric, the pathogen perpetuates
easily, building up inoculum potential for A. Disease eradication B. Disease tolerance C. No effect D. Pandemic E. Epiphytotic outbreak of disease
90. The tolerant varieties to
turmeric leaf spot are A. Suguna B. Sudarshan C. Surya D. Suguna and Sudarshan E. Sugna and Surya
91. “Tiger stripe” or “Tiger claw”
appearance is associated with A. Verticillium wilt B. Fusarium wilt C. Bacterial wilt D. Temporary wilt E. All of them
92. Wilt resistant varieties of G. hirsutum and G.
barbadense are A. Vijay Pratap B. Varalakshmi C. Verum D. Jayadhar E. All of them
93. Wilt can be controlled using A. Mencozeb 1g/lit B. Butachlor 1g/lit C. Zeneb 1g/lit D. Carbendazim 1g/litre E. Endosulfan 1g/lit
94. For Biological control of
diseases seed treatment is done with A. Tricoderma gosipi B. Tricoderma viride C. Tricograma viride D. Tricograma gosipi E. Xanthomonas viride
95. Ascochyta blight fungus
survives in the infected plant debris as A. Conidia B. Ascus C. Pycnidia D. Odia E. Clestothecia
96. Ascochyta blight fungus secondary spreads is mainly through
air-borne A. Pycnidiopores (conidia) B. Clestothecia C. Pycnidia D. Ascospore E. Teliospore
97. Chemicals used for seed
treatments are A. Thiram B. Carbendazim C. Bavistin D. H2SO4 E. All of them
98. The lesions which cover the
entire leaf surface in rust are A. Odium B. Uredosori C. Conidia D. Ascus E. Pycnidia
99. The fungus causing rust in gram
survives as Uredospores in the legume weed A. Tricoderma viride B. Tricograma viride C. Tricograma gosipi D. Trigonella polycerata E. None of them
100.
Rust is spread through A. Insects B. Human C. Wind D. Debris E. Seed born
101.
Fusarium oxysporum f.sp.
Ciceris
produces A. Branched hyphae B. Microconidia C. Macroconidia D. Chlamydospores E. All of them
102.
Wilt disease is A. Seed born B. Insects born C. Human born D. Wind born E. Machine born
103.
The bacterial culture used for seed treatment is A. Trichoderma viride B. Pseudonomas fluorescens C. Xanthomonas lemon subsp. citri D. Xanthomonas oryzae E. Rhizactonia solani
104.
Which is not the Wilt resistant cultivars of gram
A. Avrodhi B. Alok Samrat C. Haryanachana-1 D. JG- 322 E. Hans
105.
Varieties like Kalyanasona, Sonalika, Choti
Lerma, Lerma Rojo, Safed lerma, NP 700 & 800 are resistant to A. Powdery mildew B. Bacterial blight C. Virus D. Rust E. Wilt
106.
To control rust in wheat at 15 days interval
Spray twice or thrice with A. Mancozeb@0.25% B. plantavax@0.1% C. Zineb@0.25% D. Dithiocarbamates E. Any of them
107.
In India it is the most common rust in the
northern and eastern parts A. Black rust B. Brown rust C. Yellow rust D. Blue rust E. Green rust
108.
In India, the role of Thalictrum javanicum and T.
flavum for brown rust is as A. Primary host B. Tertiary host C. Secondary host D. Main host E. Growth inhibitor
109.
Some weeds like Agropyron semicostatum, Bromus catharaticus, Bromus japonicus and
Hordeum murinum also serve as primary source of inoculum to A. Black rust B. Brown rust C. Yellow rust D. Blue rust E. Green rust
110.
In loose smut of wheat All the spikelets in a
panicle transform into a mass of A. Black powdery spores B. Brown powdery spores C. Yellow powdery spores D. White powdery spores E. Green powdery spores
111.
Wheat smut causing fungus is A. Internally seed born B. Externally seed born C. Systemic D. Not seed born E. Internally, externally seed
born and systemic
112.
Karnal bunt disease was first reported in India
from Karnal (Haryana) by A. Mira B. Mitra C. Moore D. Maina E. None of them
113.
The bunt affected plants emits a foul smell which
is mainly due to the presence of A. Sulfur B. Alliopropile C. Trimethyl amine. D. Hydroxy amine E. Acetone
114.
varieties, viz., WL 1562, HD 2281 are tolerant to A. Wilt B. Powdery mildew C. Downy mildew D. Smut E. Karnal bunt
115.
Wilt fungus in cotton produces toxin which is
partially responsible for wilting A. Vivotoxin, Fusaric acid B. Aflatoxin C. Eurosic acid D. Glucosinulate E. Hydroxy amine
116.
Fusarium oxysporum can remain in soil as A. Parasite B. Saprophyte C. Obligate parasite D. Parasite and saprophyte both E. All of them
117.
Resting spores of wilt fungus are A. Teliospores B. Urediospores C. Chlamydospores D. Odium E. Hyphae
118.
The secondary spread in wilt is through conidia
and chlamydospores which are disseminated by A. Insects B. Animals C. Seed D. Water E. Air
119.
An Indofil product very specific to brown rust
control is A. RH-12 B. RH-124 C. RH-1241 D. RH-241 E. RH-24
120.
smut spores germinate and produce A. Promycelium or sporidium B. Chlamydospores C. Uredospores D. Teliosopores E. Conidia
121.
Wheat smut fungus sporidia infects the healthy A. Seed B. Leaf C. Flower D. Root E. Stem
122.
sickle shaped (allantoid) secondary sporidia are
produced which help in the dispersal of A. Wilt B. Powdery mildew C. Downy mildew D. Smut E. Karnal bunt
123.
The Verticilium wilt fungus can survive in the
infected plant debris and in soils as A. Microconidia B. Macroconidia C. Microsclerotia D. Teliospore E. Sporangium
124.
Spot drench with 0.05 per cent Benomyl or
Carbendazim is recommended for A. Blight B. Powdery mildew C. Downy mildew D. Verticilium wilt in cotton E. Smut
125.
White rust fungus is a A. Facultative parasite B. Obligate parasite C. Facultative saprophyte D. Obligate saprophyte E. None of them
126.
Fungus derives its nutrition from host through A. Spores B. Conidia C. Chlamydospores D. Odium E. Haustoria
127.
In systemic infection of white fungus, Oogonia
and antheridia join by means of a fertilization tube, resulting in A. Oospore B. Zoospore C. Conidia D. Clestothecia E. Teliospore
128.
Elliptical to kidney shaped and are biflagellate
spores are called A. Oospore B. Zoospore C. Conidia D. Clestothecia E. Teliospore
129.
Variety susceptible to yellow rust is A. Sonara-64 B. Sonalika C. PBW 343 D. Lerma Rojo and Safed Lerma E. NP 700 & 800
130.
Varieties kalyana sona, PV 18, WG 307 and HD 450
are resistant to A. Wilt B. Powdery mildew C. Downy mildew D. Smut E. Blight
131.
To control smut which type of seed treatment is
done A. Hot water treatment B. Solar seed treatment C. Anaerobic seed treatment D. Seed treatment vitavax@0.2% or Benlate@0.2% E. All of them
132.
The secondary spread of white rust is through A. Oospore B. Zoospore C. Conidia D. Clestothecia E. Teliospore
133.
Mustard varieties like RC 781, PYSR 8 and PR 10
are resistant to A. Blight B. White rust C. Yellow rust D. Smut E. Bunt
134.
To control white rust in mustard Seed dressing is
done with A. Seven B. Bavistin C. Vitavax D. Metalaxyl E. Rogoor
135.
Peronospora parasitica is a A. Facultative parasite B. Obligate parasite C. Facultative saprophyte D. Obligate saprophyte E. None of them
136.
Powdery mildew disease of mustard secondary
spread is through wind borne A. Sporangia B. Conidia C. Chlamydospores D. Zoospore E. Teliospore
137.
Each Cleistothecium contains A. 2-3 asci B. 14-18 asci C. 4-8 asci D. 1-2 asci E. 10-12 asci
138.
Each Ascus contains A. 2-3 ascospores B. 14-18 ascospores C. 10-12 ascospores D. 3-8 ascospores E. 13-18 ascospores
139.
To control powdery mildew in mustard Spray the
crop with A. Wettable sulphur @0.2% B. Dinocap @0.1% C. Tridemorph @0.1% D. Dinocap @0.1% or
tridemorph@0.1% E. Any of them
140.
Mango malformation when affected seedlings
develop abnormal growth, swollen and have very short internodes is known as. A. Anthacnose B. Blight C. Die back D. Vegetative malformation E. Floral malformation
141.
The flower buds are transformed into vegetative
buds and a large number of small leaves and stems, which are characterized by
appreciably reduced internodes and give an appearance of witches‟ broom. The
flower buds seldom open and remain dull green is known as A. Anthacnose B. Blight C. Die back D. Vegetative malformation E. Floral malformation
142.
Insect assosiated with mango malformation is A. Aceria mangiferae B. Acacei mangifera C. Acacea catechu D. Bemisia mangiferi E. White fly
143.
Insects associated with sooty mould in mango are A. Aceria mangiferae B. Mealy bug, scale insect and hopper C. White fly D. Acacea catechu E. Bemisia mangiferi
144.
IDM stands for A. INTIGRATED DISEASE MECHANISM B. INTIGRATED DEAL MANAGEMENT C. INTERVAL DISEASE MANAGEMNT D. INTIGRATED DISEASE MANAGEMENT E. INTERNAL DISEASE MANAGEMENT
145.
Which on is not a biological control used
organism A. Tricoderma viride B. Trichoderma hargianum C. Tricograma spp. D. Pseudomonas fluorescens E. All of them
146.
Mustard varieties like Kranthi and Krishna are
tolerant to A. Blight B. White rust C. Yellow rust D. Powdery mildew E. Downy mildew
147.
Ascochyta blight of gram is caused by A. Botrytis cineria B. Erysiphe pisi C. Fusarium oxysporum D. Ascochyta rabiei E. Peronospora viciae
148.
Alternaria brassicae (Berk.) Sacc.causes
disease A. Wilt B. Powdery mildew C. Alterneria blight D. Rust E. Smut
149.
Leifsonia xyli subsp. xyli is a A. Fungus B. Bacterium C. Virus D. Algae E. Viroid
150.
disease appears as minute water soaked round,
yellow spots which enlarge slightly and turn brown, eruptive and corky
pustules are surrounded by a characteristic yellow halo, the disease is A. Wilt B. Powdery mildew C. Citrus canker D. Rust E. Smut
151.
The insect helps in the dissemination of the
pathogen of citrus canker A. Citrus leaf miners B. White fly C. Plant hopper D. Catterpilar E. None of them
152.
The scientific name of Citrus leaf miner is A. Aphis gossypii B. Bamessia tabeci C. Nelapervata lugence D. Phyllocnistis citrella E. Helicoverpa armingeara
153.
Secondary infections of citrus gummosis often
occur through lesions created by A. Puccinia graminis B. Rhizactonia C. Alternaria D. Albugo E. Phytophthora
154.
The Citrus gummosis fungi produces large numbers
of motile A. Ascospores B. Zoospores C. Basidiospores D. conidia E. Sporangiospore
155.
The production of white, fuzzy lesions on
vegetative parts of the plant (leaves, petioles, vines) and stems of fruit.
Lesions will often appear first on lower leaves the disease is A. Wilt B. Powdery mildew C. Alterneria blight D. Rust E. Smut
156.
Fungus that will only sporulate on the
underside of leaves producing purplish-brown spores in white, fuzzy
fungal growth. Heavy infection will lead to the browning (burning) of leaves
the disease is A. Downy mildew B. Powdery mildew C. Alterneria blight D. Rust E. Smut
157.
Circular to oblong concentric black velvety rings
appear in the chlorotic area. The lesions develop towards the base of the
leaf. The spots join together and spread quickly to the entire leaf area. The
leaves gradually die from the tip downwards the disease is A. Downy mildew B. Powdery mildew C. Alterneria blight D. Rust E. Purple blotch
158.
The disease appears in the form of tumor-like
swellings of leafveins, leaf stalks, peduncles, stems as well as fruits. The
infected veins show a swollen hanging appearance to the leaves.
Initially the tumors are glossy which rupture later on and become rough. They
are about 3 mm broad and up to 12.5 mm long, the disease is A. Stem blight B. Stem rot C. Stem gall D. Stem canker E. Stem bunt
159.
Protomyces macrosporus source of primary infection is A. Wind born B. Soil born C. Seed born D. Insect born E. None of them
160.
Flowers turn a papery brown and become covered
with gray, fuzzy masses. Senescing flowers are particularly susceptible. Tan
to brown spots with a target-like appearance can also develop on the leaves.
These patches are often associated with flowers which have dropped onto the
leaf surface. This disease is A. Botrytis blight B. Dieback C. Powdery mildew D. Black leaf spot E. Purple blotch
161.
It is a common and serious rose disease often
reaching epidemic proportions in a season the disease is A. Dieback B. Botrytis blight C. Powdery mildew D. Black leaf spot E. Purple blotch
162.
To control black leaf spot in rose following
should not be done A. Plant Resistant Varieties B. Maintain Good Sanitation C. Keep Leaves Dry D. Remove & Destroy Infected
Canes E. Apply excess of irrigation
163.
To control black leaf spot in rose following
chemicals should be sprayed A. Chlorothalonil B. Mancozeb C. Myclobutanil D. Propiconazole E. Any of them
164.
Powdery mildew occurs when the relative humidity
is A. High at night and high during
the day B. Low at night and high during
the day C. High at night and low during
the day D. Low at night and low during the
day E. Relative humidity has no effect
165.
The following roses have blackspot and powdery
mildew disease resistance A. Hybrid tea: ‘Duet,’ ‘Eiffel Tower,’
‘Grand Slam,’ ‘Jamaica,’ ‘Matterhorn’ B. Floribunda: ‘Golden Slipper,’
‘Saratoga’ C. Grandiflora: ‘Camelot,’ ‘John S. Armstrong,’
‘Pink Parfait,’ ‘Queen Elizabeth’ D. Shrub roses: ‘All That Jazz,’
‘Carefree Wonder’ E. All of them
166.
To control Alternaria blight in sun flower seed
treatment with following is not recommended A. Carboxl B. Captan C. Mencozeb D. Hexaconozol E. Any of them
167.
Sclerotia
stem rot symptoms include A. Elongated water soaked lesions
appear on stem near to the crown region, covered with cottony mycelial growth
later on. B. Plant looks like whitish from
distance at internodes or base. C. Premature ripening and
shredding of stem, wilting and drying. D. Brown to black sclerotial
bodies may also be seen in the later stage on the infected plant parts. E. All of them
168.
the organism that can cause disease is called A. Host B. Vector C. Pathogen D. Insect E. Fungus
169.
death of infected tissue is called A. Chorosis B. Necrosis C. Etiolation D. Spot E. Rot
170.
time period between a pathogen to enter and
develop disease symptoms is called A. Disease cycle B. Infection period C. Necrotic period D. Incubation period E. Isolation period
171.
Which of the following is not a method by which
pathogens affect the yield of crops? A. Reduce the quantity of yield B. Reduce the quality of crop
produce C. Increase in cost production D. Increase the flowering period E. All of them
172.
Which of the following is not a method of the
perpetuation of disease by the pathogen? A. The entry of pathogen through
natural openings B. Reproduction by pathogen C. Reducing the quantity of yield D. Direct penetration of the
pathogen E. None of them
173.
Which of the following is not related to
Necrosis? A. Curling of leaves B. Discolouration of leaves C. Death of tissues D. A common symptom of fungal
diseases E. Mostly due to pathogen
174.
Necrosis cannot be in the form of A. Lesions B. Scabs C. rot D. Cankers E. Blight
175.
Which of the following is not related to Rots? A. Degeneration of succulent
tissue B. Distortion of leaves C. Discolouration of tissue D. It is of two types E. All of them
176.
Which of the following is not true regarding
Chlorosis? A. Yellowing of leaves B. Death of plant tissues C. Non-formation of chlorophyll D. Destruction of chlorophyll E. Reduced photosynthesis
177.
Which of the following is not a common symptom of
plant disease? A. Necrosis B. Leaf curls C. Chlorosis D. increased flowering E. rotting
178.
Which one is not pathogenic fungi A. Phytopthora B. Puccinia C. Agaricus D. Fusarium E. Pithium
179.
Which is not the fruiting body formed by fungus A. Clestothecia B. Basidium C. Ascus D. Picnidum E. Sclerotia
180.
Fungus does not has A. Chlorophill B. Haustoria C. Nucleus D. Hyphae E. Rhizoids
181.
Fungus are A. Autotrophic B. Chemo autotropic C. Hetrotropic D. Photo autotropic E. All of them
182.
The body of fungus is made of A. Cellulose B. Chitin C. Aminoacid D. Phophorus E. Cholrophill
183.
Which disease of plant is known as ring disease? A. Citrus canker B. Black arm of cotton C. Rust D. Wilt of potato E. Smut
184.
Disease of plant caused by the bacteria. It is
also known as ring disease because brown ring is formed on A. Xylem B. Phloem C. Leaf D. Flower E. Seed
185.
In Bacterial Blight disease of plant large yellow
spots appear on leaves that eventually turn A. Grey B. Black C. Brown D. Blue E. Orange
186.
Gray Mold disease of plant is also known as A. Botrytis B. Phytopthora C. Puccinia D. Agaricus E. Fusarium
187.
Downy Mildew plant disease is caused due to A. Sun eclips B. Shades C. Heavy rains D. Dry spell E. Prolonged wetness
188.
Citrus Canker is the disease of plant where
Leaves, branches, fruits all are affected it originated in A. India B. China C. America D. Australia E. Pakistan
189.
In which disease of plant stem rot at soil line
with brown to red lesions? A. Phytopthora B. Puccinia C. Agaricus D. Rhizactonia E. Fusarium
190.
It is Gram negative, non spore forming, aerobic
bacteria. It is rod shaped, forms chains and capsules and is motile by one
polar flagellum. Causes disease in citrus, identify the bacteria A. Bacillus citri B. Pseudomonas citri C. Xanthomonas campestris pv citri D. Thermus aqaticus citri E. None of them
191.
Which one not true for zoospores A. Motile B. Biflagellate C. Pear shaped D. 7 – 9 micron meter E. Formed under Ascocarp
192.
They are single celled, hyaline and barrel shaped
are produced in chain. A. Zoospores B. Conidia C. Clestothecia D. Sporangia E. Picnidium
193.
Eight Ascospores are present in the A. Ascus B. Clestothecia C. Picnidium D. Conidia E. Perithicium
194.
Conidia germinate in the high relative humidity
usually available on the leaf surface at A. 10-25˚C B. 19-22˚C. C. 19-22˚C with an optimum of
10-25˚C . D. 10-25˚C with an optimum of
19-22˚C. E. None of them
195.
Conidia in mass appear pinkish. They are borne
singly at the tip of A. Conidiophore B. Sporangiophore C. Zoospore D. Clestothecia E. Picnidium
196.
disease management inculudes A. Clean culture B. Chemical control C. Resistant varities D. Biological control E. All of them
197.
Which is not fungicide A. Mencozeb 1g/lit B. Zeneb C. Urea D. Metalaxy E. Sulphur
198.
late blight of potato is favoured by A. Temp.-10-25°C B. Night temperature:10°C C. Cloudiness on the next day D. RH->90% , and Rainfall at
least 0.1mm, E. all of them
199.
Late blight of potato resistant variety is A.
Kufri alankar B.
Kufri lalima C.
Kufri jyoti D.
Chipsona E.
All of them
200.
Among them who is plant pathologist A. K.C.MEHTA B. DR BORLAGUE C. DR SWAMINATHAN D. DR PUSKARNATH E.
DR. SHIVPOOJAN SINGH |
|
Answer Key
|
1. A 2. C 3. C 4. D 5. D 6. E 7. A 8. B 9. D 10. D |
11. A 12. B & D 13. E 14. A 15. B 16. C 17. B 18. A 19. C 20. A |
21. E 22. B 23. A 24. D 25. B 26. B 27. A 28. C 29. D 30. C |
31. C 32. A 33. A 34. B 35. C 36. E 37. B 38. D 39. B 40. E |
41. C 42. A 43. D 44. C 45. B 46. C 47. C 48. D 49. E 50. E |
|
51. C 52. B 53. B 54. A 55. B 56. C 57. A 58. C 59. E 60. D |
61. E 62. E 63. D 64. A 65. C 66. D 67. A 68. E 69. B 70. C |
71. B 72. A 73. D 74. D 75. A 76. B 77. A 78. B 79. B 80. C |
81. D 82. A 83. C 84. B 85. A 86. C 87. D 88. B 89. E 90. D |
91. A 92. E 93. D 94. B 95. C 96. A 97. E 98. B 99. D 100. C |
|
101. E 102. A 103. B 104. E 105. D 106. E 107. B 108. C 109. C 110. A |
111. E 112. B 113. C 114. E 115. A 116. B 117. C 118. D 119. B 120. A |
121. C 122. E 123. C 124. D 125. B 126. E 127. A 128. B 129. A 130. D |
131. E 132. B 133. B 134. D 135. B 136. A 137. C 138. D 139. E 140. D |
141. E 142. A 143. B 144. D 145. E 146. B 147. D 148. C 149. B 150. C |
|
151. A 152. D 153. E 154. B 155. B 156. A 157. E 158. C 159. B 160. A |
161. D 162. E 163. E 164. C 165. E 166. D 167. E 168. C 169. B 170. D |
171. D 172. C 173. A 174. C 175. B 176. B 177. D 178. C 179. E 180. A |
181. C 182. B 183. D 184. A 185. C 186. A 187. E 188. B 189. D 190. C |
191. E 192. B 193. A 194. E 195. A 196. E 197. C 198. E 199. E 200. A |
7.
