Repel X PE, an emulsifiable fly spray to be mixed with water for direct application to horses and ponies. Provides protection from biting and bloodsucking flies, gnats and mosquitoes; repels horn, stable, horse, house and deer flies. Contains 0.27% prallethrin and 1% piperonyl butoxide to provide fast knockdown of flies. Directions: apply at a 1:7 dilution to protect from horn flies, house flies, gnats and mosquitoes. Where horse flies, deer flies, stable flies, ticks or deer ticks might be a problem, apply at a 1:4 dilution.