Ready-to-Use Suspension for Control of Flies & Lice on Lactating and Non-Lactating Dairy Cattle, Beef Cattle, Calves & Horses Provides control of chewing (or biting) and sucking lice. One application controls lice. Has a zero day pre-slaughter interval and milk discard time. May be used as a component of an integrated pest management program, either alone or in combination with other insecticides as an aid to prevent the development of insecticide resistance. Contains Diflubenzuron 3.0%, Permethrin 5.0%.