Equine and Livestock Citronella Fly Spray by dac is a natural formula to protect your animals against pesky insects. Does not contain any pyrethrins, pyrethrums, pyrethroids or industrial pesticides. Made from natural essential oils, Citronella, Rosemary and Cedar Oil that provides up to 2 days of protection and is water based so it won't attract dust and dirt. Safe to use on wounds and has a pleasant scent. dac's Citronella spray is effective against Deer, House, Stable, Horse and Black Flies; also against ticks, mosquitoes and gnats.