Warehouse Beetle - School IPM - USU Extension

    Warehouse Beetle

    Trogoderma variabile

    Warehouse beetle

    Adult warehouse beetle (Joseph Berger, Bugwood.org)

    Warehouse beetle

    Left: Adult and larval warehouse beetle (Whitney Cranshaw, Colorado State University, Bugwood.org) Right: Carpet beetle larval hairs (hastasetae) (Pest and Diseases Image Library, Bugwood.org)

    Warehouse beetle

    Warehouse beetle larva (Ryan Davis, Utah State University Extension)

    Identification

    • 1/8 inch long
    • covered in orange, white and black scales/hairs
    • look similar to other carpet beetles; verify ID

    Nesting Habits

    • lay eggs in stored food products and any animal or plant-based products

    Diet

    • cake mix, candy, cereals, chocolate, cookies, corn, dog food, pasta, oats, peas, potato chips, dried fruit, rice, spices
    • anything of animal origin including dead animals and pet and human hair that has collected on the floor, etc.

    Significance

    • infest and ruin food
    • hastasetae (arrow-shaped hairs) on larvae can irritate throat if consumed

    IPM Recommendations

    • Inspect all incoming food items for pests.
    • Quickly clean up all spilled food products, especially in food storage areas.
    • Properly store all susceptible food items in pest-proof containers.
    • Keep food in regular rotation.
    • Keep moisture low in food storage areas by improving ventilation.
    • Dispose of infested food items.
    • Consider monitoring in food storage areas with a warehouse beetle pheromone lure and trap.

    Additional Resources

    IPM for Fabric and Pantry Pests: Integrated Pest Management in Sensitive Environments (University of Nebraska-Lincoln Extension)