Fly Stuff > Fly Sprays & Roll On's Mosquito Halt 32 oz Spray Price $21.53 Stock status: Out of Stock Stock status: In Stock Product Code: RJ145-50 Qty: Description Sizing Information Reviews Mosquito Halt by Farnam * Stops mosquitoes before they bite* Helps prevent West Nile Virus and Eastern & Western Equine Encephalitis! Mosquito Halt – Kills and repels mosquitoes, gnats, face, stable & house flies. Provides both quick knockdown, kill & residual control. Safe for use on horses, foals over 6 wks of age and ponies. Contains 0.2% permethrin, 0.13% prallethrin and 0.5% piperonyl butoxide, as well as soothing aloe, lanolin and PABA sunscreen.