Insect Stop from Agri-Growth is a 100% natural diatomaceous earth insect controller. Diatomaceous earth (silicon dioxide) is a physical and non-chemical control to which insects cannot build up a resistance. Insect Stop is odor free, non-staining 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.