我国是农业病虫害发生危害严重的国家,发生农作物病虫草鼠害种类约1700多种,造成严重危害约有100多种,重大生物灾害年发生面积60~70亿亩次。据测算,如果不采取防控措施,可能造成我国粮食产量损失2200多亿斤,油料370多万吨,棉花200万吨以上,果品和蔬菜上亿吨,潜在经济损失5000亿元以上。化学防治的贡献率达到90%以上。 China is a country where pests and diseases in agriculture are seriously harmed. About 1 700 species of pests, diseases, and pests occur in crops, causing about 100 kinds of serious damage and 60-70 billion mu of major biological disasters annually. It is estimated that if we do not take prevention and control measures, it may result in the loss of over 220 billion kilograms of grain output, over 3.7 million tons of oil, over 2 million tons of cotton, over 100 million tons of fruits and vegetables and over 500 billion yuan of potential economic losses. The contribution rate of chemical control reached more than 90%.