Perma Guard Crawling Insect Control Diatomaceous Earth Powder / 2 Pound Bag Pure diatomaceous earth powder for crawling insect control, no fillers or baits added. This insecticide is mechanical insect killer, which means bugs cannot become immune! Bugs will die within 48 hours of ingestion of DE powder. Effective against ants, bed bugs, box elder bugs, carpet beetles, centipedes, crickets, cockroaches, earwigs, fleas, grasshoppers, millipedes, slugs, and silverfish. This product can be safely used indoors and outdoors for a variety of applications including residential, commercial, and agricultural use. This product is meant to be applied with a hand or powder duster and can be applied to directly to infested areas or where insects like to hide such as cracks and crevices.