Description Pyranha Legacy Fly Spray â Non-oily, citronella-scented spray for horses kills and repels flies, fleas, ticks, mosquitoes and gnats. Kills deer ticks that may carry Lyme disease. Quick knockdown.Contains 0.5% permethrin, 0.25% pyrethrins and 2.5% piperonyl butoxide.Apply as a spray or wipe-on. Repeat in 10-14 days or as needed. Reapply after animal is washed, has had excessive sweating or if exposed to heavy rain. Do not use on foals under 3 months of age.Made in the USA.