Lawn & Garden Pest Destroyer is a combination of the beneficial nematodes Steinernema carpocapsae and Heterorhabditis bacteriophora, which controls over 250 lawn and soil pests including but not limited to Weevils, Fleas, European Chafer, Cutworms, Wireworms, Rootworms, Grubs, and Cranefly larvae (Leatherjackets). They work by attacking the larval stage of the insect before they have a chance to become adults. This combo pack of beneficial nematodes is a natural and effective alternative to chemical pesticides. These nematodes have no negative or harmful affect on other non-target beneficial species of helpful garden insects. More importantly nematodes are safe to use around children and animals. 1 pouch (5 million) covers 75 square meters of lawn or garden.