Kill fleas in the yard and garden where they breed. Flea Destroyer is made of 7 million microscopic organisms that penetrate the body of juvenile fleas living in the soil, and is harmless to people, pets and the environment. After killing the juveniles, these organisms reproduce and continue searching for more pests. For effective flea control, a three-part program is important: fleas must be attached on pets and animals, in the carpet and upholstery, and outside in the ground. Flea Destroyer is the crucial third step to control the fleas outdoors.