Crop Protection MCQ For Upcoming Examination!

1. Which pest is commonly controlled by the use of neem oil in IPM?

• a) Aphids
• b) Slugs
• c) Birds
• d) Rodents

2. What is the main function of herbicides?

• a) Insect control
• b) Weed control
• c) Disease prevention
• d) Fertilization

3. Which of the following is a systemic fungicide?

• a) Captan
• b) Mancozeb
• c) Propiconazole
• d) Sulfur

4. Which insect pest is known for transmitting the rice tungro virus?

• a) Brown planthopper
• b) Green leafhopper
• c) Rice weevil
• d) Stem borer

5. What is the role of Trichoderma in plant protection?

• a) Pest attractant
• b) Biofertilizer
• c) Biocontrol agent
• d) Growth hormone

6. Which part of the plant is affected by powdery mildew?

• a) Roots
• b) Leaves
• c) Stems
• d) Flowers

7. What is the mode of action of contact herbicides?

• a) Systemic
• b) Localized
• c) Translocation
• d) Hormonal

8. What type of organism is a nematode?

• a) Insect
• b) Fungus
• c) Bacteria
• d) Worm

9. Which pest management strategy involves the use of natural enemies?

• a) Chemical control
• b) Biological control
• c) Mechanical control
• d) Cultural control

10. Which of the following diseases is caused by a virus?

• a) Bacterial wilt
• b) Fusarium wilt
• c) Leaf curl
• d) Downy mildew

11. What is the primary purpose of crop rotation in pest management?

• a) Enhance soil fertility
• b) Reduce pest buildup
• c) Improve crop yield
• d) Increase water retention

12. What is the main characteristic of selective herbicides?

• a) Target specific weeds
• b) Kill all plant types
• c) Work only in wet conditions
• d) Require high dosages

13. Which method is used to control nematodes in the soil?

• a) Soil solarization
• b) Chemical fumigation
• c) Crop rotation
• d) All of the above

14. What is the role of pheromone traps in IPM?

• a) Attract and kill pests
• b) Repel pests
• c) Increase pollination
• d) Enhance growth

15. Which disease is characterized by yellowing and wilting of leaves?

• a) Anthracnose
• b) Bacterial wilt
• c) Powdery mildew
• d) Leaf spot

16. Which stage of insect development is typically the most destructive?

• a) Egg
• b) Larva
• c) Pupa
• d) Adult

17. What is the primary target of fungicides?

• a) Weeds
• b) Insects
• c) Diseases
• d) Rodents

18. Which practice helps in preventing soil erosion and pest infestations?

• a) Monoculture
• b) Cover cropping
• c) Heavy tillage
• d) Overgrazing

19. Which insect pest is notorious for its resistance to pesticides?

• a) Cotton bollworm
• b) Diamondback moth
• c) Grasshopper
• d) Rice bug

20. What type of pesticide is used to control rodents?

• a) Herbicide
• b) Fungicide
• c) Rodenticide
• d) Insecticide

21. Which of the following is an abiotic factor that can cause plant disease?

• a) Fungi
• b) Bacteria
• c) Viruses
• d) Nutrient deficiency

22. What is a key symptom of root-knot nematode infestation?

• a) Leaf curling
• b) Galls on roots
• c) Fruit rot
• d) Stem blight

23. What is the role of mycorrhizal fungi in plants?

• a) Fix nitrogen
• b) Enhance water uptake
• c) Repel pests
• d) Produce toxins

24. Which practice is essential for preventing the spread of soil-borne diseases?

• a) Over-irrigation
• b) Crop sanitation
• c) Monoculture
• d) Deep plowing

25. What is the benefit of using resistant plant varieties in IPM?

• a) Reduced chemical use
• b) Enhanced growth
• c) Increased water demand
• d) Uniform crop size

26. Which of the following insects is a beneficial pollinator?

• a) Honeybee
• b) Termite
• c) Ant
• d) Grasshopper

27. What is the function of surfactants in pesticide formulations?

• a) Increase stickiness
• b) Reduce toxicity
• c) Enhance absorption
• d) Dilute the mixture

28. Which is an example of a non-chemical weed control method?

• a) Herbicide application
• b) Mulching
• c) Fertilization
• d) Irrigation

29. Which insect pest is known for its damage to stored grains?

• a) Rice weevil
• b) Armyworm
• c) Corn borer
• d) Leafhopper

30. What is the purpose of using a pre-emergent herbicide?

• a) Control weeds before they germinate
• b) Kill existing weeds
• c) Enhance crop growth
• d) Improve soil fertility

31. Which practice is used to prevent the development of pesticide resistance?

• a) Overuse of chemicals
• b) Rotation of chemicals
• c) Monoculture
• d) High application rates

32. Which organism causes black rot in cruciferous vegetables?

• a) Xanthomonas campestris
• b) Fusarium oxysporum
• c) Phytophthora infestans
• d) Pseudomonas syringae

33. Which is a key advantage of using cultural control methods?

• a) Immediate results
• b) Cost-effectiveness
• c) Requires special equipment
• d) Always effective

34. Which insect is a natural predator of aphids?

• a) Ladybird beetle
• b) Ant
• c) Mosquito
• d) Butterfly

35. Which is an example of a physical control method?

• a) Insecticide spraying
• b) Handpicking insects
• c) Crop rotation
• d) Biological agents

36. What is the role of Bt (Bacillus thuringiensis) in crop protection?

• a) Soil conditioner
• b) Natural insecticide
• c) Growth enhancer
• d) Fungicide

37. Which crop disease is caused by the fungus Puccinia graminis?

• a) Rust
• b) Smut
• c) Blight
• d) Mildew

38. What is the main purpose of biological control in agriculture?

• a) Use of chemicals
• b) Use of natural enemies
• c) Increase yields
• d) Alter crop genetics

39. Which symptom is associated with bacterial leaf blight in rice?

• a) Yellowing of leaves
• b) Leaf spots
• c) White patches
• d) Leaf curling

40. What type of pest control method involves using barriers or traps?

• a) Biological control
• b) Chemical control
• c) Physical control
• d) Cultural control

41. Which practice helps in reducing the risk of aflatoxin contamination in crops?

• a) Overwatering
• b) Proper drying
• c) Deep plowing
• d) Heavy fertilization

42. Which insect pest is commonly associated with sucking plant sap?

• a) Grasshopper
• b) Aphid
• c) Leaf miner
• d) Armyworm

43. What is the effect of nematicides on nematodes?

• a) Stimulate growth
• b) Inhibit feeding
• c) Repel
• d) Kill

44. What is the primary purpose of crop rotation?

• a) Maximize yield
• b) Reduce pest buildup
• c) Increase water usage
• d) Enhance seed germination

45. Which organism is used in biological control to manage aphid populations?

• a) Honeybee
• b) Lacewing
• c) Beetle
• d) Wasp

46. Which practice is important for maintaining soil health and fertility?

• a) Heavy pesticide use
• b) Crop diversification
• c) Overgrazing
• d) Monoculture

47. What is the impact of beneficial insects in pest management?

• a) Increase pest populations
• b) Reduce pest populations
• c) Have no effect
• d) Only affect plant growth

48. Which of the following is a common sign of viral infection in plants?

• a) Leaf mottling
• b) Root rot
• c) Wilting
• d) Stem breakage

49. What type of insect is typically controlled using pheromone traps?

• a) Biting insects
• b) Chewing insects
• c) Sucking insects
• d) Moths

50. What is the goal of integrated pest management (IPM)?

• a) Eradicate all pests
• b) Minimize pest damage sustainably
• c) Use only organic methods
• d) Increase chemical usage