Flour Mite / Grain Mite

Natural Habitat

Found in stored food products like flour, grains, cheese, dried fruit, and powdered milk. They thrive in warm, humid environments.

Diet & Feeding

Feeds on fungi (mold) growing on grain and flour, as well as the grain germ and endosperm itself. They can also infest cheese and other dried foodstuffs.

Behavior Patterns

They reproduce rapidly in humid conditions. When environmental conditions are poor (lack of food or dry conditions), they can enter a 'hypopus' stage where they become resistant to desiccation and can hitch rides on other insects to new locations.

Risks & Benefits

Risks: Major stored-product pest. Heavy infestations spoil food, giving it a 'minty' odor and bitter taste. Can cause allergic reactions in humans (known as 'Baker's Itch' or 'Grocer's Itch') and may cause enteritis if ingested in large quantities. No benefits to humans.

Identified on: 3/8/2026