Gordon's® 7681072 Ready-To-Use Horse & Stable Spray, 1-GallonReady to use insecticide formulation. Use on horses and ponies or as a premises spray. Water based leaves no oily residue. Kills crawling and flying insects on contact. For fast acting control of biting flies and other flying insects. Size: 1 Gallon Water based pyrethrin insecticide For fast acting control of biting flies & other flying insects Use on horses & ponies or as a premise spray Leaves no oily residue Easy to use trigger spray.