Prozap 5079610 Bovi-Rub Cattle Back Rubber, 10'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 gallons of solution and recharge as necessary to