Heavily infested grain can take on a "sickening" taste and smell. In large storage bins, they typically only infest the top few inches because the adults cannot penetrate deeply into the grain mass. Angoumois Grain Moth - Penn State Extension

Angoumois grain moth larvae feed on a number of whole kernel grains. Their feeding causes a reduction in grain weight and quality. Penn State Extension Common Stored Grain Insect Pests - SDSU Extension

This is a , meaning it can attack whole, undamaged kernels of grain.

The larvae develop inside individual kernels of grain, such as corn, wheat, or popcorn. You might only notice them when they emerge, leaving a tiny circular hole in the seed.

Small, buff to yellowish-brown moths with a wingspan of about 13–17 mm. Their hindwings have a distinctive finger-like projection at the tip.