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1.农药在农产品生产中的作用农药在保护农作物、防治病虫草害,改善人类生存环境,控制疾病方面发挥了巨大作用。据权威人士估计,在世界范围内,如不施农药,由于病虫草害,粮食总产量将减产1/3,使用农药所带来的收益大体上为农药费用的4倍。由于使用农药,我国每年挽回的粮食损失占?
1. The role of pesticides in agricultural production Pesticides play a great role in the protection of crops, the prevention and control of pests and weeds, the improvement of human living environment and the control of diseases. According to the authoritative sources, if pesticides are not used throughout the world, the total grain output will be reduced by 1/3 due to pests, diseases and weeds, and the profits from the use of pesticides will be roughly 4 times the costs of pesticides. Due to the use of pesticides, the annual grain loss in China accounts for?