Diseases, pests, grasshoppers, and other harmful biological disasters have been the most important and long-term obstacles to the development of agricultural development. Guo Yuyuan, Academician of the Chinese Academy of Engineering and director of the Academic Committee of the State Key Laboratory for Biology of Plant Diseases and Insect Pests, pointed out that the fight between humans and pests is a long-term one. Long-term early warning, well-informed information, timely disposal, and mastery of laws must be implemented to implement sustainable development and plant protection strategies. Biological and chemical pesticides should complement each other. At present, people have a misunderstanding and always think that biological pesticides are the safest. When they mention chemical pesticides, they think they should be eliminated. The fact is that although biological pesticides are relatively safe, their general effects are slow, their effects are not obvious, their prevention and control are not complete, and their effective period is very short. The pests and diseases that occur in large areas cannot be effectively controlled. Academician Guo Yuyuan believes that unscientific use is the cause of the negative effects of chemical pesticides. At present, there is a phenomenon of indiscriminate use and abuse of chemical pesticides, especially blindly increasing the dose of pesticides. He emphasized that the use of excessive quantities and failure to use them in accordance with the regulations has caused serious problems such as pesticide poisoning and agricultural product residues. The use of pesticides should not blindly reject the use of biological pesticides as a single use of chemical pesticides, but they should be used together to form complementary advantages. For many years, China has implemented a plant protection policy that focuses on prevention and comprehensive prevention, including the use of chemical protection technologies that comply with the principle of comprehensive prevention and control. It has been applied in large-scale demonstrations of about 270,000 hectares in 37 comprehensive prevention and control demonstration zones. The technical coverage rate is about 6.7 million hectares. , Has made some major pests and diseases have been effectively controlled or harm mitigated. The loss of grain is 15 to 30 kilograms per mu, and 4-6 kilograms of lint. In particular, it has withstood the severe test of successive outbreaks such as bollworm, brown rice borer, and wheat stripe rust. The amount of pesticide applied has been reduced by 1/3, and the number of natural energies has doubled. The input-output ratio has reached 1:5 to 10? It has achieved significant economic, social and ecological benefits; it has brought the overall level of China's integrated pest control technology to a new stage.
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