Brown Bug in House: Grain Weevil, Not Carpet Beetle—Check Whole Grains

The brown bug (not black) with no grains/seeds visible in your house is a grain weevil (Sitophilus spp.) — rice, granary, or maize weevil.

Hidden Sources

• Whole grains: rice, wheat, corn, barley, birdseed, popcorn.
• "Bean bags" filled with corn kernels — common overlooked source.
• Decorative corn, wheat bundles.
• Pet food (some contain whole corn).

Action

1. Inspect all whole grain products. Discard infested.
2. Check bean bags, decor, pet food.
3. Freeze questionable 4 days at 0°F.
4. Vacuum shelves. Store kept grains airtight.

See sowbug guide (for comparison). Weevils only damage whole grains — harmless otherwise.