As a pest control professional I get frequent calls about houseflies, gnats, mosquitoes, fruit flies and unidentified, flying & swarming insects. Concerned customers and prospective customers want our technicians to go to their homes or business and “exterminate them all.” They want an insect free environment. Unfortunately, there is no easy answer to flying insects. There is no magic spray that we can use to erase their problems and there is no such thing as an insect free environment, nor should that be the goal. Sure, flying insects that are present at the time of a treatment can be killed with a quick knockdown material, but others will take their place in short order. The problem is that they, well…fly! In the case of crawling pests, a residual barrier can be placed around a home or other building and the pests crawling across the material will be killed. In the case of flying insects there is no contact wi