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plant pathology MCQs

Practise focused plant pathology questions with marked answers for exam preparation and subject revision.

plant pathology Mcqs
1. Insects have_________________?
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A. 20 segments

B. 12 segments

C. 11 segments

D. None

2. The beneficial relationship between two organisms living together is called__________________?
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A. Common salism

B. Osmosis

C. None of the above

D. Symbiosis
3. Malathrion and Parathion insecticides belongs to_________________?
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A. Pyrethroid group

B. Carbamate group

C. Organo-phosphate

D. Organo-chlorine group

4. The larval stage of flies (Diptera) is known as_________________?
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A. Maggot

B. Cocoon

C. Worm

D. Grub

5. IPM is a pest control strategy in which__________________?
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A. Pest are controlled culturally

B. Cultural and biological control techniques are used

C. Pesticides are used

D. Predators and parasites are used

6. Collar rot in chilies is caused by___________________?
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A. phytophytora cupri

B. Rhizowhtnia solani

C. phytophithoua spri

D. phytophilorea infesta

7. The popular insecticides of organo-chlorine group are________________?
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A. Naled

B. DDT & BHC

C. Leaf minors

D. Malathion and thrips

8. The wings and legs of insects are present in___________________?
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A. Thorax

B. Abdomen

C. Head

D. Neck

9. Antenae of insect is__________________?
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A. Locomotion organ

B. Sensory organ

C. None of the above

D. Sex organ

10. Stalk root of onion is caused by________________?
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A. Gassicls

B. Fungi

C. Nematodes

D. Bacteria
11. Honey bee, bumble bee, butter flies and moths are___________________?
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A. Pests

B. Parasites

C. Pollinators

D. Productive insects

12. Viral disease can be controlled by __________________?
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A. Cultural practices and growing resistant varieties

B. Fungicides

C. Cultural practices

D. Can not be controlled

13. Which of the following is disease of rice____________________?
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A. Brown spot Ratti disease

B. Foot rot

C. Rice blast

D. All the above
14. The factors which induces disease outbreak is________________?
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A. High temperature

B. High humidity

C. All the above

D. Susceptible varieties

15. The fungus belonging to order Erysiphales cause_________________?
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A. Powdery mildew

B. Blights

C. None of the above

D. Smuts

16. Whip smut is disease of________________?
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A. Maize

B. Wheat

C. Rice

D. Sugarcane
17. Thread like structure surrounding the pupal stage of the insect (Silk worm) is_________________?
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A. Typhoon

B. None of the above

C. Cocoon

D. Silk

18. The insecticides with least mammalian toxicity are____________________?
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A. Organo-phosphate

B. Carbamates

C. Organo-chlorine

D. Pyrethroids
19. Cockroach cutworms grass hoopers, stem borer and fruit borers are______________?
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A. Jumping type insects

B. None of the above

C. Chewing type insects

D. Sucking type insects

20. Disease are transmitted through_________________?
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A. All the above

B. Seeds

C. Winds, insects

D. Agricultural machinery and implements

21. Insect body is divided in to_____________________?
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A. 10 regions

B. 2 regions

C. 3 regions

D. 5 regions

22. The sucking type insects pesis are controlled by________________?
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A. Chlorinated hydrocarbons

B. Pyrethroids

C. Organo-phosphatcs

D. Botanical pesticides

23. The insects have__________________?
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A. 2 pair of wings and 2 pair of legs

B. 2 pair of wings and 3 pair of legs

C. None of the above

D. 3 pair of wings and 2 pair of legs

24. The substance used to treat pesticide poisoning is called as_________________?
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A. Anti-pseudo

B. Detoxicant

C. Anti-poison

D. Antitode
25. Malpighian tubules are organs of_________________?
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A. Digestion

B. None of the above

C. Excretion

D. Secretion

26. Which of the following are cold blooded animals___________________?
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A. Protozon

B. Rodents

C. Human beings

D. Insects
27. Schistocerca gregaria is the name of________________?
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A. Aphid

B. Army worms

C. Locust

D. Cutworms

28. The insects which transfer disease from one plant to another is known as__________________?
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A. Vector

B. Disease transmitter

C. Pest

D. Parasite

29. Trachea in insects are the organ of___________________?
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A. Excretion

B. Digestion

C. Secretion

D. Respiration
30. the most devastating migratory pest is____________________?
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A. Army worm

B. None of the above

C. Locust

D. Cutworm

31. Gurdaspur borer is pest of__________________?
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A. Wheat

B. Sugarcane

C. Rice

D. Okra

32. Lathyrism is nervous disease caused by____________________?
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A. Consumption of matter over longer periods

B. All the above

C. Consumption of high carbohydrate foods

D. Low protein foods

33. The viral disease can be controlled by_________________?
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A. Organo-chlorine pesticides

B. Pyrethroids

C. None of the above

D. Growing resistant varieties
34. The sucking type insects of cotton are________________?
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A. Jassids and thrips

B. Thrips and whitefly

C. All the above

D. Wlutefly and jassids

35. The granular formulation are commonly applied to control_______________?
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A. Jassids and thrips

B. Leaf minors

C. Fruit and stem borers

D. Whitefly

36. Bemesia tabbaci is the name of_________________?
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A. Jassids

B. White fly

C. Thrips

D. Cutworms

37. The heart like pumping organ in insect is_________________?
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A. None of the above

B. Dorsal Vessel

C. Spiracles

D. Vena Cava

38. The sucking type insects of cotton are ________________?
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A. Jassids and thrips

B. All the above

C. Wlutefly and jassids

D. Thrips and whitefly

39. Heliothus armigera is the name of_____________________?
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A. Gram pod borer

B. American boll warm

C. Com cob borer

D. None of the above
40. The main pest of fruit in Pakistan is_________________?
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A. Leaf minor

B. Scale insects

C. Fruit fly

D. Hoppers

41. Oceli is___________________?
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A. Sense organs of insect

B. Mouth parts of insect

C. Antennae in insect

D. Eye of insect
42. The symptoms of powdery mildew appears on________________?
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A. Foliage of plants

B. Roots

C. Floral parts

D. ()

43. Club root is disease of____________________?
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A. Okra

B. Tumip

C. Cabbage

D. Water melon

44. Three regions of insect body are________________?
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A. None of the above

B. Head, thorax and abdomen

C. Head, abdomen and tail

D. Head, thorax and tail

45. Which one of the following is disease of wheat_________________?
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A. Leaf rust

B. Loose rust

C. Strip rust

D. All the above
46. The my co toxins are poisonous substance produced by__________________?
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A. None of the above

B. Plants

C. Fungi

D. Bacteria

47. The entrance point for air in insects are known as _________________?
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A. Secretion

B. Spines

C. Trachea

D. Nervous system

48. The economic injury level for white fly is________________?
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A. 2-3 nymphs/leaf

B. 1 nymphs/leaf

C. 3-4 nymphs/leaf

D. 1-2 nymphs/leaf
49. __________ is gram-positive?
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A. Pseudomonas

B. Erwinia

C. Corynebacterium

D. Xanthomonas

50. Blast disease is an international disease of________________?
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A. Cotton

B. Sugarcane

C. Wheat

D. rice