Deadly against ants, fleas, aphids, bollworms, cockroaches, earwigs, leaf hoppers, mites, slugs, Japanese beetle grubs and more, DE Insect Dust is a fast-acting combatant against almost any insect infestation. DE (diatomaceous earth) is actually pulverized shells of microscopic fresh- and saltwater algae called diatoms. This dust penetrates hard and soft shell insects, ultimately resulting in their complete deterioration; however, it is food grade and completely nontoxic to people, pets and other animals. OMRI Certified.