The IGR in Gentrol® Aerosol bolsters a baiting program, since it is shown to promote feeding. (S)-Hydroprene, the active ingredient, translocates to prevent pest larvae and nymphs from progressing to the adult stage either causing adult sterility or preventing the emergence of insects from the pupal stage, often resulting in death. Gentrol® Aerosol is applied to pest harborages as a void, crack and crevice spray, or spot treatment. Its dissipating foam and translocation virtually eliminate the chance of missing any areas. As a general surface spray or spot treatment, Gentrol Aerosol is applied to pest harborages providing control for up to four months. Its visible, dissipating foam virtually eliminates the chance of missing any areas. You'll receive the same superior coverage for crack-and-crevice applications, with Gentrol Aerosol's extension tube, designed for simple, accurate application in hard-to-reach areas.