Indian Meal Moth

Larvae feed on a wide variety of stored products: cereals, grains, flour, pasta, rice, dried fruit, nuts, seeds, spices, pet food, birdseed, chocolate, candy, and dried flowers. Can chew through cardboard, paper, and thin plastic packaging. Adults do not feed.

Larvae develop entirely within food products, creating silken webbing and leaving behind frass (excrement) and cast skins. Pupation often occurs away from food in cracks, crevices, or behind pantry shelving. Prefer dark, undisturbed storage areas. Thrive in temperatures of 70-95°F (21-35°C).

Active year-round indoors in heated environments. Outdoor populations peak in summer but indoor infestations occur in any season. More noticeable in fall/winter when adults are spotted flying near lights.

Small moths flying near lights: Adult moths seen flying around kitchen lights, especially at night. They have a distinctive zig-zag flight pattern and are attracted to light sources. Silken webbing in food: Fine white or grayish webbing throughout cereals, flour, grains, or other stored foods. The webbing clumps food particles together. Small caterpillars in pantry: Cream-colored larvae (up to 12mm long) with brown heads crawling on pantry shelves, walls, or ceilings, often near infested food. Cocoons in corners and crevices: Small white or tan cocoons attached to ceiling corners, shelf edges, or inside packaging. Pupae may be visible inside. Clumped or damaged food: Food products with clumped material, small holes in packaging, or visible larvae and cast skins mixed throughout. Musty or foul odor: Heavily infested foods develop a characteristic unpleasant smell from frass and larval secretions.

Inspect all food products before bringing them home from the store. Store susceptible foods in airtight glass or heavy plastic containers. Rotate stock - use older products first to avoid long-term storage. Clean pantry shelves regularly to remove spilled grains and crumbs. Freeze bulk grains and flour for 4 days after purchase to kill any eggs. Don't buy damaged or torn food packages. Keep pet food and birdseed in sealed containers separate from human food.

Successful control requires a multi-step approach. First, locate and dispose of all infested food products - even unopened packages near the source. Thoroughly vacuum all pantry shelves, cracks, and crevices. Wash shelves with hot soapy water. Professional treatment may include pheromone traps to monitor populations and targeted applications in non-food areas. Proper sanitation and storage practices are essential for long-term prevention. Follow-up monitoring ensures complete elimination.