General Questions
1. What is the most common pest of paddy?
Ans: Yellow stem borer (Scirpophaga incertulas).
2. Which pest causes hopper burn in rice?
Ans: Brown planthopper (Nilaparvata lugens).
3. What is the main damage symptom caused by rice stem borer?
Ans: Dead hearts and whiteheads.
4. Which pest transmits the Tungro virus in paddy?
Ans: Green leafhopper (Nephotettix virescens).
5. What is the scientific name of the rice gall midge?
Ans: Orseolia oryzae.
6. What pest creates floating cases in paddy fields?
Ans: Rice caseworm (Nymphula depunctalis).
7. Which pest causes silver shoots in paddy?
Ans: Gall midge (Orseolia oryzae).
8. What is the scientific name of the brown planthopper?
Ans: Nilaparvata lugens.
9. Which pest scrapes the upper surface of rice leaves?
Ans: Rice hispa (Dicladispa armigera).
10. What is the economic threshold level (ETL) for brown planthopper?
Ans: 5-10 hoppers per hill.
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Stem Borers
11. What is the scientific name of the yellow stem borer?
Ans: Scirpophaga incertulas.
12. What type of damage do stem borers cause in the vegetative stage?
Ans: Dead hearts.
13. What type of damage do stem borers cause in the reproductive stage?
Ans: Whiteheads.
14. Which stage of the pink stem borer causes damage?
Ans: Larval stage.
15. What is the damage symptom caused by pink stem borer?
Ans: Dead hearts in the vegetative stage.
16. What is the primary biological control for rice stem borer?
Ans: Trichogramma chilonis.
17. Which cultural practice helps manage rice stem borers?
Ans: Timely planting.
18. What type of trap is used to monitor stem borer populations?
Ans: Pheromone traps.
19. What is the ETL for yellow stem borer?
Ans: 1 moth or egg mass per square meter.
20. What is the lifespan of the yellow stem borer moth?
Ans: 7-10 days.
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Leaf Folders
21. What is the scientific name of the rice leaf folder?
Ans: Cnaphalocrocis medinalis.
22. What damage symptom does the rice leaf folder cause?
Ans: Folded and skeletonized leaves.
23. What is the ETL for rice leaf folder?
Ans: 1-2 larvae per hill.
24. What is a mechanical control for rice leaf folder?
Ans: Light traps.
25. What chemical is effective against rice leaf folder?
Ans: Chlorantraniliprole.
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Brown Planthopper (BPH)
26. Which virus does the brown planthopper transmit?
Ans: Grassy stunt virus.
27. What is the mode of feeding of the brown planthopper?
Ans: Sucking sap from phloem.
28. Which stage of the brown planthopper is most damaging?
Ans: Both nymphs and adults.
29. What is a biological control agent for BPH?
Ans: Spiders.
30. What cultural practice minimizes BPH outbreaks?
Ans: Avoiding excessive use of nitrogen fertilizers.
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Gall Midge
31. Which stage of rice gall midge causes damage?
Ans: Larval stage.
32. What is the damage symptom of rice gall midge?
Ans: Formation of silver shoots.
33. What is the ETL for gall midge?
Ans: 1 silver shoot per square meter.
34. What is a resistant variety for gall midge?
Ans: IR36.
35. Which season increases gall midge incidence?
Ans: Rainy or monsoon season.
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Rice Hispa
36. Which stage of rice hispa causes damage?
Ans: Both adults and larvae.
37. What is the ETL for rice hispa?
Ans: 2 adults per hill.
38. What is the preferred control for rice hispa?
Ans: Foliar sprays of insecticides like Lambda-cyhalothrin.
39. Which pest scrapes leaves and causes white streaks?
Ans: Rice hispa (Dicladispa armigera).
40. What type of leaves does rice hispa attack?
Ans: Young leaves.
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Caseworm
41. What is the scientific name of the rice caseworm?
Ans: Nymphula depunctalis.
42. What damage symptom does the rice caseworm cause?
Ans: Floating leaf cases and cut leaves.
43. What is the ETL for rice caseworm?
Ans: 1 case per hill.
44. Which habitat is preferred by rice caseworm?
Ans: Waterlogged fields.
45. How is rice caseworm controlled?
Ans: Draining water from fields.
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Earhead Bug
46. Which pest causes chaffy grains in paddy?
Ans: Rice earhead bug (Leptocorisa acuta).
47. What is the ETL for rice earhead bug?
Ans: 1 bug per hill.
48. Which stage of rice does the earhead bug attack?
Ans: Flowering and milky stages.
49. What is the feeding mode of the rice earhead bug?
Ans: Sucking sap from grains.
50. What is the scientific name of the rice earhead bug?
Ans: Leptocorisa acuta.
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Integrated Pest Management (IPM)
51. What is IPM?
Ans: Integrated Pest Management.
52. Name a cultural practice in IPM for rice pests.
Ans: Field sanitation.
53. What is the primary goal o
f IPM?
Ans: Minimize pest damage and environmental harm.
54. Which trap is used for monitoring stem borers?
Ans: Pheromone trap.
55. Which trap is used for general pest monitoring in paddy?
Ans: Light trap.
