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Agriculture Plant Pathology Set-2
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1. Choose the wrong combination:
Esso fungicide = Copper oxychloride
Ziram = Cuman
Thiram = Hexathir
Zineb = Kitazin
2. In which rust pustules are arranged in end-to-end manner and forming strip?
Yellow rust
Orange rust
Black rust
White rust
3. Anthracnose of Grape is also known as:
Bird s-eye disease
Buck eye rot
Black spot
Both (a) & (c)
4. Yellow pigment in the culture is produced by:
Pseudomonas
Xanthomononas
Erwinia
Agrobacterium
5. Irish famine was caused due to:
Wheat rust
Apple scab
Late blight of potato
Tomato wilt
6. Late blight of potato is caused by:
Alternaria solani
Xanthomonas campestris pv. Citrii
Phytophthora infestans
Sychytriu endobioticum
7. Leaf roll of potato is caused by:
Fungus
Bacterium
Virus
Mycoplasm
8. Leaf roll of potato is transmitted by:
M. persicae
M. pseudosolani
M. circumflexum
All above
9. Levillula is a:
Ectoparasitic
Endoparasitic
Both (a) & (b)
None of the above
10. Lichen is an association between:
Algae and Fungus
Bacterium and Fungus
Fungus and Virus
Fungus and Nematode
11. Linseed rust is caused by:
Uromyces
Melampsora lini
Physaqmidium
Ravenelia
12. Acervuli is _____ shaped:
Round
Saucer
Oblate
Conical
13. Loose smut of wheat can be effectively controlled by:
Crop rotation
Soil treatment with non-systematic fungicides
Seed treatment with systemic fungicides
Spraying the crop with fungicides
14. Loose smut of wheat is a disease known as:
Internally seed borne
Externally seed borne
Air borne
Soil borne
15. Meloidogyne belongs to group of:
Ecotoparasite
Endoparasite
Semi-ectoparasite
Semi-endoparasite
16. Micro organisms were first observed by:
John Tyndall
L.J. Thernard
Antony Van Leeuwenhock
Louis Pasteur
17. Microbiology is the science of which we study: A. B. C. D.
Viruses
Bacteria
Fungi
All above
18. Modification of floral parts into leafy structures by pathogenic infection called:
Hyperplasia
Hypertrophy
Phyllody
Witch s broom
19. Yellow ear rot of wheat is caused by:
Anguina
Corynebacterum
Both (a) & (b)
Heterodera
20. Most effective fungicide against powdery mildew disease:
Dithane
Captan
Karathane
Bavistin
21. Most of the plant parasitic nematodes belong to order:
Tylenchida
Dorylaimida
Aphelenchida
Rhabditida
22. Mycology is the study of: A. B. C. D.
Bacteria
Algae
Virus
Fungi
23. Mycoplasma disease of plant was first reported by:
Butler
Brefeld
Anton de Barry
Doi et al. and Ishire et al.
24. Mycoplasma is sensitive to:
Pencillin
Steptomycin
Bavistin
Tetracycline
25. Plant overgrowth due to increase in size of cell of the tissue:
Hypoplasia
Hypertrophy
Hyperplasia
All of the above
26. Nematode genus Hoplolaimus Daday was first recorded in _____ from an island in the Paraguay river:
1900
1905
1910
1915
27. Hemittodet penetrate in plant tissues with the aid of:
Stylet
Saliva
Labial papilla
Cervicial
28. Oil from American elm seed contains 55 per cent capric acid toxic to Ceratocystis uimi the pathogen causing the famous _____ disease:
English elm
Dutch elm
American elm
French elm
29. Once the pathogen has established in an area steps taken to remove or destroy is known as:
Exclusion
Eradication
Protection
Management
30. Plant overgrowth due to increase in size of cell of the tissue:
Hypoplasia
Hypertrophy
Hyperplasia
All of the above
31. Pectinolytic enzymes of plant pathogens playa major role during pathogenesis in diseases like:
Rusts
Downy mildew
Wilts damping-off and root/foot rots
Powdery mildew
32. Phycomycetes belong to:
Fungi
Bacteria
Yeast
None of the above
33. Phyllactinis causes the disease:
Powdery mildew
Downy mildew
Leaf spot
Blight
34. Phytophthera belongs to family:
Peronophythoraceae
Pythiaceae
Pareonosporaceae
Albuginaceae
35. With regard to nutrition Erysiphe is:
Ectoparasite
Endoparasite
None of the above
Predator
36. Plant parasitic nematodes posses:
Two part oesophagus
Three part oesophagus
Four part oesophagus
None of the above
37. Plant pathogenic viroids contain:
Externally seed-borne disease
Externally seed-borne and soil-borne disease
Air-brone disease
Inernally seed-borne disease
38. With Phase is common in:
Blast of Paddy
Bacteria blight of Paddy
White rust of Crucifers
Red rot of Sugarcane
39. Powdery mildew disease is caused by:
Bacterium
Fungus
Virus
Nematode
40. Powdery mildew fungi belong to the family:
Erysiphaceae
Hypocereaceae
Hypomycetaceae
Nectriaceae
41. The symptom of red rot of sugarcane mostly found on:
Stem
Root
Leaf
Arrow
42. Powdery mildews are controlled by spray of:
Copper fungicides
Mercury fungicides
Sulphur fungicides
Miscellaneous fungicides
43. Primary source of infection to green ear disease of bajra is:
Insect
Soil
Air
Seed and soil
44. Pycnidia are formed in order:
Moniliales
Melanoconiales
Sphaeropsidales
All of the above
45. Pythium belongs to class:
Chytridiomycetes
Oomycetes
Zygomycetes
Hypochytridiomycetes
46. Radophyceae is also known as:
Red algae
Green algae
Blue-gree algae
None of these
47. Red rot of sugarcane is caused by:
Fusarium
Alternaria
Dreschlera
Colletotrichum
48. Red scales of ______ (red varieties) contain protocatechuic acid and catechol which may exude in drops to resist the attack of colletotrichum circinans:
Garlic
Onion
Leek
Celery
49. Rhizopus belongs to class:
Oomycetes
Zygomycetes
Trichomycetes
Ascomycetes
50. Root knot of vegetable is caused by:
Meloidogyne
Heterodera
Pratylenchus
Xanthomonas
51. Root parasite of bajra is:
Cuscuta
Striga
Orobanche
Loranthus
52. Root rot of papaya could be controlled by application of:
Bordeaux mixture
Dithane M-45
Benelate
Calaxin
53. Rust teleutospore on germination produce:
Four basidiospores
Two basidiospores
Indefinite basidiospores
None of these
54. Rust belongs to sub-division:
Zygomycotina
Ascomycotina
Basidiomycotina
Deuteromycotina
55. Secondary spread of ergot of bajra is through:
Seed
Air
Insect
Both (a) and c
56. Severity of disease club root of cabbage can be reduced by application of:
Lime
Gypsum
FYM
Fertilizers
57. Sexual dimorphism means:
Males and Females are separate
Males and Females are morphologically dissimilar
Female posses didelphic ovaries
None of the above
58. Shape of bacterial cells is:
Spheres
Spiral
Rods
All of the above
59. Smut gives the appearance of:
Compact hardness
Sooty powder
Superficial growth
Dusty layer
60. Smut of wheat is effectively controlled by:
Bavistin
Vitavax
Benelate
Thiram
61. Wilt of arhar is caused by:
Verticillium
Fusarium
Xanthomonas
Meloidogyne
62. Some ______ varieties of apple exude toxic wax on leaf surface to prevent germination of conidia of Podosphaera leucotricha:
Scab resistant
Leaf blight resistant
Powdery mildew resistant
Rust resistant
63. Some varieties of _____ are resistant to wilt due to the presence of hydrocyanidies (HCN) in root exudates:
Sunflower
Safflower
Castor
Linseed
64. Species Plantarum is the greatest contribution of:
Linnaeus
P.A. Micheli
Saccardo
Anton de Bary
65. Sporangium on germination produce vesicle in genera:
Phytophyhora
Pythium
Sclerospora
Personospora
66. Stipe disease of barley is caused by:
Drechalera gramineum
Drechalera oryzae
Puccinia striiformis
None of the above
67. Strawbery plants infected with P. penetrans (nematode) have been successfully treated with exposure in hot water at:
49.4?C for 17.5 min.
52.8?C for 6 min.
54.5?C for 4 min.
56?C for 2 min.
68. Striga is plant parasite included in:
Fungi
Mycoplasma like organisms
Phanerogamic plant parasites
Bacteria
69. Sugar beet cyst nematode was reported by:
Needham
Cobb
Schacht
Smith
70. Systemic fungicides was discovered by:
Van Schleming and Kulka
Millardet
Tillet
Prevost
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