Insect dust controls ants, ticks, fleas, cockroaches, earwigs, palmetto bugs and soft body crawling insects. Kills crawling insects by cutting into exoskeleton and dehydrates them. Keeps killing insects for nine months. DE Insect Dust can be used indoors and outdoors. All natural ingredients (made from FOOD GRADE Diatomaceous Earth). The DE Insect Dust is not harmful to humans, pets or the environment.