The Warehouse Beetle (Trogoderma variabile) is adults: dark brown to nearly black with indistinct mottled pale and dark scale pattern; larvae: reddish-brown with alternating pale and dark bands and typically measures Adults 1/8–3/16 inch; larvae up to 1/4 inch with distinctive barbed hairs. The Warehouse Beetle (Trogoderma variabile) is a member of the dermestid beetle family and a close relative of the Khapra Beetle (T. granarium) — one of the most destructive stored-product pests in th.

Yes — the Warehouse Beetle is considered a high-risk pest. Larvae covered in barbed hairs (hastisetae) cause intestinal injury and allergic reactions if ingested. Destroys grain, pet food, dried animal products, wool, and silk. Larvae enter diapause — extremely difficult to eliminate. Significant health concern compared to most stored-product beetles.

In Arizona, warehouse beetles are most often encountered in the following situations: Small (1/8–3/16 inch) dark brown oval beetles with mottled wing covers found in grain, pet food, or dried animal products. Reddish-brown banded larvae with long tail hairs in food products. Larvae can cause intestinal irritation if ingested. Extremely persistent — larvae survive months without food.

The Warehouse Beetle is most active during: Year-round indoors; larvae can survive months in diapause without food; thrives in Arizona's warm climate. Arizona's warm desert climate can extend activity periods compared to other states, so year-round vigilance is recommended in the Phoenix metro and surrounding areas.

Store grain and pet food in airtight containers. Inspect purchased products. Freeze new purchases for 2 weeks. Regularly inspect and rotate stored food. Professional inspection recommended for suspected infestations.

Professional pest control strongly recommended — larvae in diapause survive standard treatments. Discard all infested products. Thorough vacuuming and cleaning. Insecticide treatment of cracks and crevices. Multiple follow-up treatments required.

Left unchecked, Warehouse Beetle infestations can cause significant structural or food-storage damage over time. Larvae covered in barbed hairs (hastisetae) cause intestinal injury and allergic reactions if ingested. Destroys grain, pet food, dried animal products, wool, and silk. Larvae enter diapause — extremely difficult to eliminate. Significant health concern compared to most stored-product beetles. Early detection and professional treatment are the most cost-effective approach — contact Pest Control Bros for an inspection at the first sign of activity.