Insect Stop is a 100% natural insect controller. Diatomaceous earth (silicon dioxide) is a physical and non-chemical control to which insects cannot build up a resistance. This natural product is odour free, nonstaining and is not harmful to animals, fish, fowl or food. It protects against earwigs, cockroaches, beetles, spiders, wasps, ants, fleas, silverfish, bedbugs, crickets, and grain insects.