An insecticide impregnated tag is described which may be used on either the animal's tail or leg to control files, grubs, etc. The tag comprises a flat flexible member which is impregnated with the insecticide and which has a flexible strap secured thereto. The strap is adapted to be wrapped around and secured to the animal's tail or leg. When the tag is attached to the animal's tail, the whipping of the tail by the animal will control insects on the animal's hindquarters, rump and back. When the tag is attached to the animal's leg adjacent the hoof, the insecticide in the tag will control those insects normally found in the area adjacent the animal's hooves.