Angoumois grain moth

Definition

A small gelechiid moth (Sitotroga cerealella) whose larvae develop inside the kernels of cereal grains, making it a major pest of stored and field corn, wheat, rice, and sorghum worldwide. Unlike surface-feeding stored-product pests, the larva completes its entire feeding stage within a single grain, leaving only a neat emergence hole; infestations are often detected only after adult moths emerge in storage facilities, households, or export shipments.

Etymology

Named after the Angoumois region of western France, where it was first recognized as a serious grain pest in the 18th century.

Example

In warm-humid climates, Angoumois grain moth populations can explode during the storage phase: a single infested ear of corn may harbor dozens of larvae, each pupating within its own kernel and emerging as adults that reinfest surrounding grain.

Synonyms

• rice grain moth
• Sitotroga cerealella

Related Terms

• stored-product entomology
• internal feeder
• Gelechiidae
• primary pest
• grain infestation
• emergence hole

Usage Notes

Distinguished from surface-feeding stored-grain moths (e.g., Indian meal moth, Plodia interpunctella) by its internal-feeding habit; the common name 'rice grain moth' is used in Asian contexts but refers to the same species. Quarantine regulations often specifically target Angoumois grain moth in international grain trade.