Repel-Xpe Emulsifiable Fly Spray Concentrate repels horn flies, house flies, stable flies, horse flies, and deer flies. Helps protect against gnats, mosquitoes, and ticks. Mix 1 part concentrate to 7 parts water to protect horses from horn flies, house flies, gnats, and mosquitoes; repeat every 3 to 4 days. Mix 1 part concentrate to 4 parts water where horse flies, deer flies, stable flies, ticks, or deer ticks are a problem; repeat as often as necessary. Apply with a pressure sprayer or sponge, making sure to wet the coat thoroughly. Use approximately 8 oz. for each animal, depending on size. Repel-Xpe Concentrate contains 0.27% prallethrin and 1.00% piperonyl butoxide.