Foodstuffs are contaminated by the silk, faecal material or frass, and the bodies of the insects themselves.A major pest of warehouses and, more recently, retail premises.

• 对食物的污染来自茧丝、排泄物、蛀屑和虫体本身，已成为仓库的主要虫害，近年来对零售店危害也很大。