One effective and safe way to control crawling insects that are usually found around the house is to use diatomaceous earth. Also known as diatomite, diatomaceous earth is non-toxic and it is effective against crawling insects such as cockroaches, ants, silverfish, earwigs, ticks, fleas, millipedes, centipedes, crickets, carpet beetles, bed bugs and stink bugs.
Diatomaceous earth is a type of soft sedimentary rock that crumbles easily. Its main component is called diatom, which is the fossilized remains of single celled organisms called phytoplanktons. As a pesticide, it comes in the form of a white powder and works by absorbing the lipids from the exoskeletons of insects, thereby dehydrating them. The powder may also be used outdoors in the garden to control slugs, snails and crawling insects.