The Oriental Cockroach (Blatta orientalis) is dark brown to nearly black, shiny and typically measures Male: ~1 inch; Female: ~1.25 inches. The oriental cockroach (Blatta orientalis) is a large, dark cockroach found throughout Arizona, particularly in cooler, damper environments than other cockroach species prefer. Adults are dark brown t.

Yes — the Oriental Cockroach is considered a high-risk pest. Oriental cockroaches are particularly associated with sewage and decaying matter, making them significant carriers of bacteria including Salmonella, E. coli, and various pathogens. They contaminate food and surfaces and contribute to indoor allergen loads.

In Arizona, oriental cockroachs are most often encountered in the following situations: Dark, shiny cockroaches near drains, under sinks, in basements, or in damp utility areas. Strong, musty odor. Droppings resembling small dark cylinders. Egg cases (dark reddish-brown, about 3/8 inch) near moisture sources.

The Oriental Cockroach is most active during: Year-round; prefer cooler temperatures than other cockroach species. 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.

Fix all plumbing leaks and eliminate standing water. Seal floor drains. Improve ventilation in basements and crawl spaces. Seal gaps around pipes and utility penetrations. Keep basements dry.

Residual insecticide treatments in damp harborage areas, drain treatments, gel baits near moisture sources, and exterior perimeter applications. Moisture control is essential for long-term management.

Cockroaches are nocturnal and highly secretive — seeing even one during the day is often a sign of a larger hidden population. Oriental Cockroachs reproduce rapidly, so early intervention is critical. Contact Pest Control Bros for a thorough inspection if you spot one.