Available as a dust and wettable powder, Tetrachlorvinphos is applied to about 18 percent of the birds treated for ectoparasites and 10 percent of premise area (20 million square feet) to control various pests. Treatments are generally applied as high-pressure sprays at a rate of 1 gallon of spray ( pound of active ingredient) spray per 100 birds. Premise applications for a variety of pests are made at a rate of to pound of active ingredient per 1,000 square feet of surface area. Dust formulations are applied to birds (dust boxes) at a rate of to .
