Merchant Grain Beetle

Pest Facts: Merchant Grain Beetles

Merchant grain beetles are typically not found in grain products, but instead like to attack cereals, cake mixes, macaroni, cookies, and chocolate. Merchant grain beetles are dark brown and have six saw-like teeth on each side of their bodies. They can grow to be one-eighth of an inch long and have very flat bodies.

Pest Facts
  • Color: Brown
  • Legs: Six
  • Shape: Narrow oval
  • Size: 1/10 inches
  • Antennae: Yes
  • Flying: Can fly and drawn to light
  • Region: All 50

The merchant grain beetle’s body shape allows it to crawl into packaging to eat, live and place eggs.


Merchant grain beetles are found in pantries or in food processing areas or warehouses.


Merchant grain beetles can infest stored food products and can contaminate food.


Discard infested packages. Clean spilled grain and food sources.

*Resource credit: Courtesy of the National Pest Management Association*