Kill the insects on the tree, instead of pesticides, but use another insect. The insects in the 8 cm long test tubes can replace chemical pesticides that are sprayed on a tree for a year, so that the purpose of controlling plant diseases and insect pests can be achieved more safely and environmentally. On November 25, 2003, the figures released by the Beijing Forestry Bureau showed that in the work of preventing and controlling pests and diseases in 2003, the area of ​​biological and biomimetic preparations was 379,100 mu, and the application rate was 81.44%. This also signifies that in the prevention and control of forest pests and diseases in Beijing, chemical pesticides are about to retreat to the second line. Pest and disease experts pointed out that traditional chemical pesticides have become a secondary means of pest control, and will be gradually replaced by biological control methods. Biological control is a method to reduce the occurrence and activity of pathogens through the action of other organisms, thereby reducing the occurrence of pests and diseases, that is, pest control and virus treatment. For example, the gypsy moth virus is used to prevent and control gypsy moths. The virus can grow together with pests in the pests, and the pests will naturally die after about 15 days. The virus only kills gypsy moths, has no effect on other organisms, and does not harm the environment.
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