(Farnam) Centaura Insect Repellent for Horse and Rider is the only insect repellent registered with the EPA for use on both horse and rider. Centaura can be used with confidence on your horse and your whole family for 12 hour protection from flies, mosquitoes and ticks. Centaura contains 20% picaridin, a safe, effective alternative to DEET. Protection starts immediately after application. Not oily, greasy or sticky. Smells great. Centaura Insect Repellent comes in a non-aerosol continuous sprayer that provides quiet, uniform coverage. Sprays from any angle, even upside down.