Which two pests are noted as attacking stored grains by chewing through the seed coat?

• A. Rice and granary weevils
• B. Indianmeal moth and Indianmeal moth
• C. Webbing clothes moth and Indianmeal moth
• D. Flour beetles and red flour beetle

Answer: (A)

The main idea is identifying stored-grain pests that damage kernels by drilling through the seed coat. Rice weevils and granary weevils do exactly that: they use their long snouts to bore into whole grain kernels, feeding inside the seed and often leaving small exit holes. This seed-coat–penetrating damage is a hallmark of these two pests and can occur even when grain looks mostly intact on the outside.

The other options describe pests that attack stored products in different ways. Indianmeal moths and webbing clothes moths are more likely to infest processed foods or fabrics, with larvae feeding inside products or on textiles rather than boring into intact kernels. Flour beetles attack milled products like flour and cereals, causing contamination and feeding damage in processed forms rather than drilling into the seed coat of whole grains.

So, the two pests that attack stored grains by chewing through the seed coat are the rice weevil and the granary weevil.