Utilizing a citronella scented, water-based formula, Piranha's Null-Fly Spray provides a quick knockdown of flying insects without attracting dust and grime. The innovative formula kills and repels stable flies, horse flies, deer flies, house flies, face flies, horn flies, gnats, mosquitoes, bot flies, ticks, fleas, and lice. Extremely powerful, it's effective for up to 30 days after application. To maintain maximum control, the product should be re-applied ever 10 - 14 days. The spray and wipe formula contains: 0.25% pyrethrums, 2.5% peperoni but oxide, and 0.50% permethrin.