Bronco Equine Fly Spray is a staple for every stable. Kills six fly species, gnats, ticks, deer ticks, fleas, chiggers and lice! Insecticide and repellent for use on horses, ponies, foals and in horse barns and stables. Ready-to-use, water-based formula with a pleasant citronella scent. Insecticide and repellent for use on horses and in horse barns and stables. Contains: Prallethrin, Permethrin, and Piperonyl Butoxide.