PEST OF SORGHUM MULTIPLE CHOICE QUESTIONS (30)

1. Which of the following is the major pest of sorghum? a) Stem borer b) Root grub c) Aphids d) Pod borer Answer: a) Stem borer 2. The shoot fly attacking sorghum is scientifically known as: a) Atherigona soccata b) Chilo partellus c) Pyrilla perpusilla d) Spodoptera litura Answer: a) Atherigona soccata 3. What is the critical stage of sorghum affected by shoot fly? a) Germination stage b) Seedling stage c) Flowering stage d) Maturity stage Answer: b) Seedling stage 4. Deadheart in sorghum is caused by: a) Stem borer b) Shoot fly c) Aphids d) Cutworm Answer: b) Shoot fly 5. The stem borer damaging sorghum is scientifically called: a) Spodoptera litura b) Chilo partellus c) Helicoverpa armigera d) Atherigona soccata Answer: b) Chilo partellus 6. Which of the following pest affects the panicle of sorghum? a) Shoot fly b) Grain midge c) Stem borer d) Root grub Answer: b) Grain midge 7. The sorghum midge is scientifically known as: a) Stenodiplosis sorghicola b) Pyrilla perpusilla c) Chilo partellus d) Atherigona soccata Answer: a) Stenodiplosis sorghicola 8. Which pest causes "silver shoot" in sorghum? a) Stem borer b) Grain midge c) Root grub d) Shoot fly Answer: b) Grain midge 9. Aphids on sorghum are considered: a) Major pests b) Minor pests c) Natural enemies d) Soil pests Answer: b) Minor pests 10. Spodoptera litura is commonly known as: a) Stem borer b) Armyworm c) Aphid d) Grain midge Answer: b) Armyworm 11. Which pest of sorghum has a characteristic zigzag egg-laying pattern? a) Shoot fly b) Stem borer c) Sorghum midge d) Grasshopper Answer: b) Stem borer 12. Which stage of sorghum is most vulnerable to grain midge attack? a) Vegetative stage b) Panicle initiation stage c) Grain-filling stage d) Maturity stage Answer: b) Panicle initiation stage 13. What is the primary symptom of shoot fly infestation in sorghum? a) Leaf rolling b) Deadheart formation c) Panicle shredding d) Silver shoot Answer: b) Deadheart formation 14. Sorghum root grubs mainly feed on: a) Leaves b) Stems c) Roots d) Grains Answer: c) Roots 15. Which natural predator is effective against sorghum aphids? a) Ladybird beetle b) Ants c) Spiders d) Wasps Answer: a) Ladybird beetle 16. Which of the following management strategies is effective against shoot fly in sorghum? a) Late sowing b) Early sowing c) Heavy irrigation d) No tillage Answer: b) Early sowing 17. Yellowing of sorghum leaves is caused by: a) Aphids b) Stem borers c) Shoot fly d) Grain midge Answer: a) Aphids 18. Which stage of sorghum does Chilo partellus attack the most? a) Seedling stage b) Vegetative stage c) Flowering stage d) Maturity stage Answer: b) Vegetative stage 19. What kind of damage is caused by head bugs in sorghum? a) Stalk tunneling b) Leaf discoloration c) Grain shriveling d) Root cutting Answer: c) Grain shriveling 20. The scientific name of sorghum armyworm is: a) Mythimna separata b) Spodoptera litura c) Helicoverpa armigera d) Atherigona soccata Answer: a) Mythimna separata 21. How can sorghum shoot fly be controlled biologically? a) Using neem oil b) Releasing Trichogramma c) Releasing Chrysoperla d) Applying pheromone traps Answer: b) Releasing Trichogramma 22. What is the incubation period of shoot fly eggs? a) 1-2 days b) 3-4 days c) 5-6 days d) 7-8 days Answer: a) 1-2 days 23. The sorghum midge larva feeds on: a) Leaves b) Stems c) Developing grains d) Roots Answer: c) Developing grains 24. Which of the following cultural practices reduces stem borer infestation in sorghum? a) Late planting b) High plant density c) Crop rotation d) Waterlogging Answer: c) Crop rotation 25. Head bugs in sorghum are scientifically known as: a) Calocoris angustatus b) Nephotettix virescens c) Blissus leucopterus d) Stenodiplosis sorghicola Answer: a) Calocoris angustatus 26. Larvae of Chilo partellus primarily feed on: a) Leaf whorls b) Roots c) Grains d) Panicle Answer: a) Leaf whorls 27. Which chemical insecticide is commonly used against sorghum shoot fly? a) Carbaryl b) Imidacloprid c) Chlorpyrifos d) Monocrotophos Answer: d) Monocrotophos 28. Symptoms of sorghum midge damage include: a) Honeydew secretion b) Grain discoloration c) Empty grains d) Deadheart formation Answer: c) Empty grains 29. How does grain midge overwinter? a) As eggs in soil b) As larvae in grains c) As pupae in plant debris d) As adults in grasslands Answer: c) As pupae in plant debris 30. What is the lifespan of an adult sorghum midge? a) 2-3 hours b) 1-2 days c) 3-4 days d) 5-6 days Answer: b) 1-2 days