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农作物的病虫草害可使农作物产量平均减产20%～30%,农药是作物保护的重要工具,合理使用农药是确保和提高农作物产量的主要手段之一。我国人多地少,用占世界9%的耕地面积养活占世界人口20%的13亿多人,粮食产量是关系国家稳定的重大问题。国际著名的农药专家英国Cooping博土认为,在中国如果停止使用化学农药意味着3.5亿人挨饿。目前作物保护使用的农药有杀虫剂、除草剂和杀菌剂等,用于防除害虫、杂草和病菌。害虫、杂草和病菌不是一成不变的,而是随着周围环境条件改变(如施用
Pests, diseases and weeds of crops can reduce crop yields by 20% ~ 30% on average. Pesticides are an important tool for crop protection. Proper use of pesticides is one of the main means to ensure and increase crop yields. With more people and less land, more than 1.3 billion people, who make up 9 percent of the world’s arable land, feed more than 1.3 billion of the world’s population. Food production is a major issue concerning the stability of our country. The internationally renowned pesticide expert, Cooping Bo, believes that stopping the use of chemical pesticides in China means that 350 million people are starving. Pesticides, herbicides and bactericides currently used for crop protection are used to control pests, weeds and germs. Pests, weeds and germs are not static, but rather change as the surrounding environment changes