Wipe II Citronella Fly Spray by Farnam Wipe II Citronella Fly Spray – Ready-to-use insecticide repellent can be applied as a spray or wipe. Kills and repels horse, stable, horn, house, face and deer flies, mosquitoes and gnats. Also a grooming aid and coat conditioner. Contains pyrethrins, piperonyl butoxide, and oil of citronella.