These stored product pests infest whole grains by chewing through the seed coat.

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

Answer: (C)

Pests that infest whole grains by chewing through the seed coat are the weevils. Both the rice weevil and the granary weevil drill into intact kernels, with adults making entry holes through the seed coat and larvae developing inside. This behavior is a hallmark of these two species, which is why including both in the answer is correct. Grain moths, by contrast, typically attack milled products or damaged kernels and don’t rely on chewing through the seed coat of intact whole grains in the same way. So the combination of rice weevil and granary weevil best fits the description.