Description PYthon II Dust is the only dust to contain two novel active ingredients for maximum efficacy against all major livestock ectoparasites. Zetacypermethrin is a 5th generation pyrethroid with enriched S-isomer content that is highly active against horn flies, face flies, ticks and other pests. Piperonyl butoxide is a mixed-function oxidase inhibitor that helps overcome metabolic resistance in insects and and synergizes the zetacypermethrin for maximum efficacy and residual activity. PYthon dust contains a photostable formula of piperonyl butoxide for long-lasting activity in sunlight.PRODUCT DETAILS:Odorless.Low toxicity.Can be applied with Y-TEX A-Line dust bag or handy 2 lb. shaker canister.The shaker canister is ideal for treatment of:Goats and sheepYoung dairy calves in pensHorsesAround wound areas to control fliesThe A-Line Dust bag is ideal for:Remote pasture treatmentAlleyways where forced use promotes treatmentHigh efficacy