Farnam Repel-X® Insecticide & Repellent SprayKey Benefits Repel X Insecticide and Repellent was the first fly spray on the market in 1957 and continues to remain a customer favorite. The ready to use, water based formula kills and repels six fly species, ticks, gnats and mosquitoes. Use it as a spray or wipe it on. Kills and repels stable, horse, face, deer, house and horn flies, mosquitoes, gnats, ticks, fleas, chiggers and lice For use on horses, dogs and their premises Contains Pyrethrins,