Biological control doesn't pollute environment.It is safe to human, animals and plants.It don't cause agrochemical resistance and harm to natural enemies and other beneficial biology.At the same time,building up species in nature can make themselvies breeding,so the effect will be stable.Biological control doesn‘t pollute environment.It is safe to human、 animals and plants. It don’t cause agrochemical resistance and harm to natural enemies and other beneficial biology. At the same time,building up species in nature can make themselvies breeding, so the effect will be stable