Gentrol Aerosol containing the insect growth regulator (IGR) (S)-hydroprene, Gentrol Aerosol features a dissipating foam action to target insects in hard-to-reach areas. This contact aerosol’s active ingredient translocates to prevent pest larvae and nymphs from maturing.Active Ingredients:(S)-Hydroprene 0.36%Insecticide Mode of Action: 7AInsecticide Class: Juvenile Hormone Analogues EPA Signal Word: CAUTION / PRECAUCIONApplication Rate Range: (see label) Container Size(s): 16 Oz.