Diatomaceous Earth is an effective and safe way to control a large number of crawling and ground moving household and garden pests including earwigs; millipedes; silverfish; cockroaches; ants; centipedes; fleas; carpet beetles and other crawling insects. A long-lasting organic pest control product; Diatomaceous earth is sprinkled into cracks and crevices where bugs hide and on surfaces where they travel.Made from ground fossil shells; diatomaceous earth is safe for organic gardening. The long-lasting powder pierces the skin of crawling insects or; if ingested; their internal organs; causing dehydration and death. Insect Stop is considered 'food-grade' with 93% purity.