Summit Mosquito and Gnat Barrier spray is a convenient way to rid your backyard of mosquitoes, gnats, ants, ticks, fleas, and other outdoor insect pests. By spraying the vertical surfaces that mosquitoes use as resting places such as fences, decking, and shrubbery, the homeowner can effectively kill and repel mosquitoes, gnats, and other annoying pests for up to four weeks. Summit Mosquito and Gnat Barrier spray contains permethrin, a proven residual insecticide that has been used in mosquito control for many years. It also controls a wide variety of outdoor insect pests including ants, crickets, earwigs, and more.