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LEA Mock Test: Crop Protection Questions And Answers

ByAditya Abhishek

Hey students, preparing for your upcoming agriculture examinations such as PRC LEA, UPSC, ICAR JRF, etc. but confused about whether your preparation is going well or not? Well, no more! At Agriculture Review, we keep updating new test series daily based on previous years’ questions of the Examination for Agriculturists.

In this test, you have to attempt 50 questions from Crop Science subject. Attempting all questions is necessary to identify your strengths and weaknesses. After completing the test, you can take a screenshot of your result for future reference and compare it with past performances. To stay updated with regular test series, click on the bell icon at the bottom left corner of the screen.

📘 How to Attempt These LEA Based MCQs

Follow these simple steps to simulate exam conditions, boost accuracy, and learn from mistakes effectively.

  1. Read each question carefully. Look for keywords like “primary,” “most common,” or “best suited.”
  2. Use the elimination method. Cross out obviously wrong options first to narrow choices.
  3. Time management: Aim for 1 minute per question (total 50 minutes). Mark hard questions and return to them later.
  4. Think conceptually. LEA questions often test application — ask yourself why an answer fits.
  5. Keep calculations minimal. Most MCQs are conceptual; when calculations appear, write steps clearly.
  6. After finishing, review answers. Check the answer key only after completing the whole test to assess time and accuracy.
  7. Create a revision list. Note down topics you missed and review them in short, focused sessions.
Quick tips:
  • Answer easy questions first to secure marks quickly.
  • For disease questions, remember causative agents (virus/bacteria/protozoa) and prevention methods (vaccination/biosecurity).
  • Memorize common breeds, top-producing regions, and key lab tests (e.g., CMT for mastitis).

Tip: Repeat the quiz weekly and track progress. Consistent practice beats last-minute cramming.

You can also join our Facebook Broadcast Channel, where we regularly share newly updated questions. All the best for today—I hope you become a registered Agriculturist soon!

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If you have any queries, ideas or suggestions, then please comment below. You can also connect with Agriculture Review on Facebook, Instagram, Koo and WhatsApp Messenger.

lea-mock-test-crop-protection-questions-and-answers
Crop Protection Questions

Crop Protection Questions

1. In integrated pest management (IPM), the “economic injury level” (EIL) is defined as:

2. In a pest monitoring program, yellow sticky traps are most effective for capturing which group of insect pests?

3. The rice sheath blight pathogen, *Rhizoctonia solani*, survives between cropping seasons primarily through:

4. In biological control, the parasitoid *Trichogramma chilonis* is widely used against:

5. A typical symptom of bacterial leaf blight (BLB) of rice caused by *Xanthomonas oryzae* pv. *oryzae* is:

6. Among the following weeds, which one propagates mainly through tubers, making it difficult to control mechanically?

7. The phenomenon where pest resurgence occurs after excessive use of broad-spectrum insecticides is primarily due to:

8. The disease triangle concept in plant pathology emphasizes that an epidemic occurs only when:

9. The concept of “allelopathy” in weed science refers to:

10. Which of the following management strategies best exemplifies the “cultural control” method in integrated pest management?

11. In pest monitoring, the concept of “degree-days” is used primarily to:

12. The rice planthopper, *Nilaparvata lugens*, causes “hopperburn” due to:

13. In integrated weed management (IWM), stale seedbed technique is most effective when:

14. The appearance of white, cottony growth on the underside of tomato leaves accompanied by yellowing on the upper surface indicates infection by:

15. In IPM programs, “augmentation” of natural enemies refers to:

16. Which weed is considered an alternate host of rice tungro virus, thereby contributing to its spread?

17. In fungicide resistance management, the term “FRAC code” refers to:

18. The weed *Imperata cylindrica* (cogon grass) reproduces mainly through:

19. The rice gall midge (*Orseolia oryzae*) induces gall formation due to:

20. The main purpose of using buffer zones in pesticide application is to:

21. The bacterium *Xanthomonas oryzae* pv. *oryzae*, causing bacterial leaf blight in rice, enters the plant primarily through:

22. The mycotoxin “Aflatoxin B₁” is primarily produced by which fungal species under warm and humid storage conditions?

23. In Integrated Pest Management (IPM), the concept of “sequential sampling” is mainly applied to:

24. The resistance mechanism in plants where biochemical changes inhibit insect growth or survival is known as:

25. The *Sterile Insect Technique* (SIT) has been most successfully implemented worldwide against which pest species?

26. The principal vector of tungro virus complex in rice fields of Southeast Asia is:

27. The enzyme “cutinase” produced by fungal pathogens aids in:

28. The mode of action of neonicotinoid insecticides such as imidacloprid is primarily through:

29. The pathogen *Phytophthora infestans* that caused the Irish potato famine belongs to which group of organisms?

30. The insecticide resistance management (IRM) strategy that alternates chemicals with different modes of action over time is called:

31. In the disease cycle of *Puccinia graminis* f. sp. *tritici* (wheat stem rust), the alternate host *Berberis* species plays a key role in:

32. The causal organism of downy mildew of maize (*Peronosclerospora sorghi*) is best identified microscopically by the presence of:

33. The insect *Scirpophaga incertulas* (yellow stem borer of rice) overwinters primarily in which developmental stage?

34. The principal reason for the resurgence of brown planthopper (*Nilaparvata lugens*) in rice ecosystems is:

35. The hypersensitive response (HR) in plants during pathogen attack is primarily mediated by:

36. “Cercospora leaf spot” of sugar beet produces its characteristic lesions due to which phytotoxic compound?

37. The process of “detoxification of allelochemicals” in insect midgut is primarily mediated by:

38. Which of the following fungal diseases of rice shows a “dirty panicle” symptom at harvest?

39. The virus responsible for “Papaya ringspot” belongs to which viral group?

40. The selective herbicide “Pendimethalin” inhibits which biochemical process in susceptible plants?

41. The disease “Tikka leaf spot” of groundnut is caused by:

42. The term “pseudothecium” is associated with the sexual reproductive structure of which fungal class?

43. The insect growth regulator (IGR) “diflubenzuron” disrupts insect development by:

44. The rice disease “Sheath blight” caused by *Rhizoctonia solani* spreads primarily through:

45. The pesticide formulation “WP” stands for:

46. The insect pest *Leucinodes orbonalis* attacks which major crop?

47. The “green ear” symptom in pearl millet is associated with infection by:

48. The “cultural control” of bacterial wilt in tomato (*Ralstonia solanacearum*) is best achieved by:

49. “Entomopathogenic nematodes” such as *Steinernema* and *Heterorhabditis* species kill insect hosts through:

50. The resistance-breaking biotype of brown planthopper (*Nilaparvata lugens*) that overcomes the resistance gene Bph1 in rice was first reported in:

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To learn N-P-K Computations, try checking out our tool: NPK Calculator

Aditya Abhishek has completed Bachelor Of Science in Agriculture from SDSUV, Uttarakhand. He focuses on learning and delivering knowledge on Agriculture and Home Gardening. He created Agriculture Review as a common platform for all nature enthusiast to learn better practices of agriculture, gardening & shop quality products & services.

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