Prozap VIP Insect Spray synergized organophosphate formula contains 0.025% pyrethrins, 0.25% piperonyl butoxide, and 0.50% Vapona. The ready-to-use formula controls flies, mosquitoes, and gnats on beef cattle, dairy cattle, horses, and their premises. For protection from face flies, house flies, stable flies, mosquitoes, and gnats, apply 1 to 2 oz. spray to each animal. Do not make direct application to animals more than once per day. When using Prozap VIP Insect Spray as a premise spray in barns, milk rooms, stables, etc., apply at the rate of 2 oz. spray per 1,000 cubic feet. Repeat as necessary, but not more than once daily.