The Angoumois grain moth (Sitotroga cerealella) is unique among pantry moths because its larvae develop inside individual grain kernels rather than spinning webbing through bulk food products. Females lay eggs on the surface of whole grain kernels — corn, wheat, rice, and barley are the most common targets. The larva bores into the kernel, consumes the interior, and pupates inside before the adult moth chews a circular exit hole to emerge. By the time you see adult moths flying in your pantry, the infestation has been developing inside your grain for weeks. Adults are small (6–9mm wingspan), pale tan moths with a distinctive pointed wing tip.
Controlling Angoumois grain moths requires discarding all infested whole grain products — there is no practical way to salvage grain that contains larvae developing inside the kernels. Inspect all whole grain products: popcorn, wheat berries, whole corn, and whole grain rice are the most common targets. Look for small circular exit holes in grain kernels and fine frass. Discard infested products in sealed bags outside the home. Vacuum pantry shelves thoroughly. Store all whole grain products in airtight glass or hard plastic containers. Freezing grain for 72 hours before storage kills any eggs or larvae present.
Angoumois grain moths are most active in warm weather and thrive in Arizona's climate year-round. Because larval development occurs inside the grain kernel, infestations are often not detected until adult moths are seen flying. Pheromone traps are available for Angoumois grain moths and can help detect infestations early. If you find moths in multiple pantry items or in rooms outside the kitchen, a professional inspection is recommended. Pest Control Bros LLC serves Maricopa, Chandler, Mesa, Tempe, Gilbert, and Casa Grande. Call (520) 424-5244.
Pantry Pest Problem? We Can Help.
Free inspections. No contracts. Same-week service in Maricopa, Chandler, Casa Grande, Tempe, Gilbert & Mesa.
