Ferti-Lome Natural Guard Organic Dust Insect Killer 4 lbCrawling Insect Control containing Diatomaceous Earth. A natural contact insecticide that works by causing abrasions on insects as they come in contact with product, resulting in loss of body fluids, then dehydration. Digestible by Earthworms, thus causing them no ha Effective and long lasting Very effective in controlling Snails and Slugs in bedding plant areas and around houses. Cockroaches, Ants, Earwigs, Snails, Slugs Kills with mechanical action