The Prozap® Bovi-Rub back rubber is designed for effective and economical control of flies, grubs, lice and ticks on cattle and other livestock. Superior insecticide charging with wicking action allows for low-stress application of insecticides on cattle and other livestock. Hang near water, mineral feeders or in alley ways to encourage use. Initially charge the Bovi-Rub back rubber with 2.5 to 5 gal of solution and recharge as necessary to maintain wetness.