Answer: You're referring to Diatomaceous Earth, a silica-type product made from the finely ground fossils of aquatic diatoms. It's a long-lasting product that you can safely use in your garden to control snails and slugs. It's not especially attractive to animals, mostly because there's no particular odor. It has a very fine texture, and is sprinkled liberally around plants you want to protect.
Diatomaceous Earth works best when it's dry, so plan on reapplying after a rain. It's available from Gardener's Supply, 128 Intervale Rd., Burlington, VT 05401 (Phone 800-863-1700) or from Gardens Alive, 5100 Schenley Pl., Lawrenceburg, IN 47025. (Phone 812-537-8650)
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