Harris Home Pest Control Gallon kills German cockroaches for up to 1 year. Also kills Asian lady beetles, box elder bugs, cockroaches, ants, centipedes, crickets, fleas, palmetto bugs, carpenter ants, spiders and scorpions. For both indoor and outdoor use. Kills when the spray dries. Apply as a spot and crack and crevice treatment where pests crawl and hide. Always follow label directions before use.