Cockroaches
German vs. American Cockroach: Same Bug? Not Even Close.
Published 11/28/2025 · 5 min read
Different biology, different habits, completely different treatment plans.
Size and location
German cockroaches are small (½ inch) and live indoors in kitchens and bathrooms. American cockroaches are large (1½–2 inches) and typically enter from sewers, drains, or basements.
Why German is worse
German cockroaches reproduce indoors year-round. A single female produces 300–400 offspring in her lifetime. American cockroaches are usually solo invaders you can trace to an entry point.
Treatment implications
German = multi-visit gel bait and IGR protocol, sanitation critical. American = drain and sewer line intervention plus exclusion. Do not treat them the same way.