Beneficial nematodes destroy more than 230 different kinds of soil-dwelling and wood-boring insects, including Japanese beetles, cut worms, wire worms, weevils, white grubs, fungus gnat and flea larvae, and subterranean termites. Nematodes are completely safe for people, pets and the environment, and are compatible with other beneficial insects. Each container includes seven million of these microscopic organisms. Gardeners simply mail in the postcards or register online to have their insect orders shipped to their doors at no extra cost.