Bronco Fly Spray is an insecticide and repellent for use on horses, ponies and foals as well as a premise spray for use on barns and stables. It is formulated for better penetration of the hair coat. Citronella scent. Newly designed superior spray bottle is leak proof with an easy-to-handle, ergonomic design. 32 oz Sprayer Bottle or Gallon refill.