DURVET FLY 003-3704 053603 Synergized Permethrin 1% Pour-On Insecticide, 1 Gallon For use on beef cattle lactating and non-lactating dairy cattle calves sheep lambs and livestock premises For controlling horn face horse stable house Black flies and mosquitoes Controls lice on all cattle. Ready to use Oil based for application anytime of year convenient application methods: pour-on spray-on or back-rubber Also helps control cockroaches ants spiders and Crickets