Hi agriculturists, welcome to the crop protection mcq questions test series. Read all the questions very carefully before attempting. Today’s test series consists of 50 questions on crop protection topic based on the previous year’s questions of the Licensure Examination of Agriculturists. Hence, attempting these questions will help you improve your skills for the upcoming examination.

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crop-protection-mcq-questions
Agriculture Questions Set 6 Crop Protection

Agriculture Questions Set-6

1. Which of the following is a systemic fungicide?

  • Mancozeb
  • Chlorothalonil
  • Metalaxyl
  • Captan

2. Which pest is controlled using pheromone traps?

  • Aphids
  • Fruit flies
  • Cutworms
  • Leafhoppers

3. What is the primary target of nematicides?

  • Insects
  • Weeds
  • Nematodes
  • Fungi

4. Which of the following is a contact herbicide?

  • Glyphosate
  • Paraquat
  • Atrazine
  • 2,4-D

5. Which biological control agent is used against aphids?

  • Trichogramma
  • Bacillus thuringiensis
  • Lady beetles
  • Nematodes

6. What is the mode of action of insect growth regulators?

  • Disrupting nervous system
  • Inhibiting chitin synthesis
  • Preventing molting
  • Interfering with respiratory system

7. The use of neem oil in pest control is an example of which type of control method?

  • Biological
  • Chemical
  • Cultural
  • Mechanical

8. What type of pathogen causes “late blight” in potatoes?

  • Virus
  • Bacteria
  • Fungus
  • Nematode

9. Which is a common symptom of viral infection in plants?

  • Yellowing of leaves
  • Wilting
  • Root rot
  • Galls

10. What does IPM stand for in crop protection?

  • Integrated Pest Management
  • International Pest Monitoring
  • Insect Pest Management
  • Integrated Plant Management

11. What is the most common method of controlling weeds in rice paddies?

  • Manual weeding
  • Herbicides
  • Crop rotation
  • Mulching

12. Which insect is a vector for the transmission of tungro virus in rice?

  • Brown planthopper
  • Rice bug
  • Green leafhopper
  • Stem borer

13. Which of the following is not a method of biological control?

  • Use of parasitoids
  • Use of predators
  • Use of pheromones
  • Use of pathogens

14. In crop protection, what is the main purpose of crop rotation?

  • Increase soil fertility
  • Control soil erosion
  • Break pest and disease cycles
  • Improve crop yield

15. Which chemical is commonly used as a fumigant for soil sterilization?

  • Methyl bromide
  • DDT
  • Malathion
  • Carbaryl

16. What is the primary benefit of using cover crops in pest management?

  • Improve soil structure
  • Increase soil nutrients
  • Suppress weeds
  • Enhance water retention

17. Which fungal disease affects grapes and causes powdery mildew?

  • Botrytis cinerea
  • Plasmopara viticola
  • Uncinula necator
  • Venturia inaequalis

18. Which of the following is a non-selective herbicide?

  • Atrazine
  • 2,4-D
  • Glyphosate
  • Simazine

19. In crop protection, what does the term “economic threshold” refer to?

  • Maximum pesticide residue limit
  • Minimum pest population for control measures
  • Cost of pest control
  • Crop yield loss due to pests

20. Which is a common biological control method for managing pests in stored grains?

  • Fumigation
  • Use of diatomaceous earth
  • Use of parasitoid wasps
  • Chemical insecticides

21. Which pest management strategy involves using resistant crop varieties?

  • Cultural control
  • Chemical control
  • Biological control
  • Host plant resistance

22. What is the main disadvantage of using chemical pesticides?

  • High cost
  • Development of resistance in pests
  • Slow action
  • Requires expertise

23. Which of the following is a selective herbicide used in broadleaf weed control?

  • Glyphosate
  • 2,4-D
  • Paraquat
  • Atrazine

24. The pest control method involving the release of sterilized male insects is known as?

  • Genetic control
  • Cultural control
  • Chemical control
  • Biological control

25. What is the causative agent of “black sigatoka” in bananas?

  • Fungus
  • Bacteria
  • Virus
  • Nematode

26. What type of pesticide is used to control mites?

  • Insecticide
  • Nematicide
  • Miticide
  • Fungicide

27. Which method is used to control soil-borne pathogens?

  • Foliar spraying
  • Soil solarization
  • Seed treatment
  • Trunk injection

28. What does the term “residual toxicity” mean in pesticide use?

  • Immediate toxicity
  • Long-lasting effect
  • Non-toxic to humans
  • Biodegradable

29. Which of the following is an example of a botanical pesticide?

  • DDT
  • Nicotine
  • Malathion
  • Aldicarb

30. Which pest is known for causing “hopperburn” in rice?

  • Green leafhopper
  • Brown planthopper
  • Whitefly
  • Thrips

31. What is the mode of action of Bt (Bacillus thuringiensis) in insect control?

  • Neurotoxin
  • Digestive system toxin
  • Respiratory system toxin
  • Hormonal disruption

32. What is a major disadvantage of monoculture in crop protection?

  • Increased biodiversity
  • Increased risk of pest outbreaks
  • Reduced soil erosion
  • Improved pest control

33. Which of the following is not a component of Integrated Pest Management (IPM)?

  • Biological control
  • Chemical control
  • Cultural control
  • Exclusive reliance on chemical pesticides

34. Which insecticide group does imidacloprid belong to?

  • Organophosphates
  • Neonicotinoids
  • Carbamates
  • Pyrethroids

35. What type of resistance occurs when pests become resistant to multiple classes of pesticides?

  • Cross-resistance
  • Multiresistance
  • Target-site resistance
  • Metabolic resistance

36. Which of the following is a method of cultural pest control?

  • Crop rotation
  • Pesticide application
  • Release of predators
  • Use of pheromone traps

37. What is the primary function of a surfactant in pesticide application?

  • To increase evaporation
  • To enhance spreading and adhesion
  • To reduce toxicity
  • To neutralize the pesticide

38. Which disease is caused by the bacterium Xanthomonas oryzae in rice?

  • Bacterial wilt
  • Leaf rust
  • Bacterial blight
  • Downy mildew

39. Which weed is commonly controlled by the herbicide atrazine?

  • Crabgrass
  • Nutsedge
  • Pigweed
  • Barnyard grass

40. Which of the following is an example of a mechanical control method?

  • Biological control
  • Using traps
  • Applying pesticides
  • Crop rotation

41. Which pathogen causes “downy mildew” in grapes?

  • Plasmopara viticola
  • Phytophthora infestans
  • Fusarium oxysporum
  • Erysiphe necator

42. What type of control strategy involves altering the planting time to avoid pest outbreaks?

  • Cultural control
  • Biological control
  • Chemical control
  • Genetic control

43. Which of the following is a preventive measure in pest management?

  • Applying insecticides
  • Using resistant crop varieties
  • Setting up traps
  • Spraying fungicides

44. Which fungus causes “rice blast” disease?

  • Fusarium oxysporum
  • Magnaporthe oryzae
  • Puccinia graminis
  • Rhizoctonia solani

45. Which of the following is a biological insecticide?

  • Pyrethrin
  • Malathion
  • Spinosad
  • Carbaryl

46. What is the role of a buffer zone in pesticide application?

  • To prevent pesticide drift
  • To increase pesticide efficacy
  • To enhance crop yield
  • To reduce pesticide cost

47. Which weed is commonly controlled by the herbicide atrazine?

  • Crabgrass
  • Nutsedge
  • Pigweed
  • Barnyard grass

48. Which of the following is an example of a mechanical control method?

  • Biological control
  • Using traps
  • Applying pesticides
  • Crop rotation

49. Which pathogen causes “downy mildew” in grapes?

  • Plasmopara viticola
  • Phytophthora infestans
  • Fusarium oxysporum
  • Erysiphe necator

50. What type of control strategy involves altering the planting time to avoid pest outbreaks?

  • Cultural control
  • Biological control
  • Chemical control
  • Genetic control

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