1.0% Permethrin synergized with 1.0% PBO for use as a pour on, mist spray, wipe on, or back rubber application to listed farm animals and their premises. 1 gal. treats 51-500lb. Cattle or 7300 sq. ft. and will control many listed flies, keds, lice, gnats, fleas, mosquitoes spiders, crickets and more.