Which pests are known as infesting whole grains by chewing seed coat?

• A. Rice weevil
• B. Granary weevil
• C. Rice and granary weevils
• D. Grain moth

Answer: (C)

Infesting whole grains by chewing seed coat is a behavior of primary stored-grain pests that enter intact kernels to lay eggs and feed inside. The rice weevil and the granary weevil do exactly this: a female bores through the seed coat of an undamaged grain, lays eggs inside, and the larvae develop within the kernel. You often see tiny exit holes on the seed and internal damage without obvious external spoilage until you inspect the grain closely, which is why these pests are such a concern in bulk stored cereals.

The other option doesn’t fit this behavior because grain moths typically attack processed grain products like flour, meal, or cereals and may contaminate surfaces or feed on the product rather than boring through intact grain kernels. So the combination of both pests that actively infest whole grains by chewing through the seed coat aligns with the rice weevil and granary weevil.