Ovitrol Plus Flea/Tick/Bot Spray for Dogs,Cats & Horses (16 oz) Quickly kills and repels mosquitoes, fleas, ticks, flies and lice. Use this soothing product to prevent any disease carrying-insects from harming your pet. This product kills flea eggs, and larvae up to 2 months. This product can be used on a weekly basis. Help your pets fight against disease carrying insects with this product.