The toxic compounds that kill the bad bugs will kill good ones just as swiftly. Butterflies are especially sensitive to pesticides-if you love butterflies, you won't have a prayer of seeing them in your yard if you use any kind of insecticide. And many commonly-used pesticides are fatal to other kinds of wildlife like birds, fish, reptiles, and small mammals. Try to develop a tolerance for sharing your backyard space with insects, both good and bad. Part of organic pest management means accepting small, manageable levels of pest populations in the garden.
Spiders are superb insect predators.
Yellow jackets and hornets are also good insect predators. So open the garden gate to beneficial insects.