Widely used in isolation for vegetables, rape pollen spread and breeding stock when the bird proof, potatoes, flowers and other virus-free plantlets after cover and pollution-free vegetables, can also be applied to tobacco seedlings as bird, disease prevention, physical prevention and control at present is the product of choice for various types of crops, vegetable pests. Really let the masses of consumers to eat "at ease", to make contribution to our country's vegetable basket project.