Back rubber designed for effective 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 alleyways to encourage use. Directions: Initially charge the Bovi-Rub back rubber with 2.5 to 5 gallons of solution and recharge as necessary to maintain wetness. Use Prozap insecticides for optimal results.