Pyranha Equine Roll-On for convenient water-based roll-on pest control for your horse. Kills and repels flies, fleas, ticks, mosquitoes, and gnats. Apply around horse's face and other areas where flies gather. Apply daily for 2-3 days then apply every 10-14 days as needed to maintain control. Contains 0.50% permethrin, 0.25% pyrethrins, and 2.50% piperonyl butoxide. Citronella scent.