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农田杂草的危害是很大的。据联合国粮农组织估计,世界农业受草害影响减产近10％,因此世界上发达国家,把农田杂草的化学防除作为农业增产的一项主要措施。日本稻田已全部采用化学除草,美国和苏联化除面积达50％以上,英国95％粮食作物面积使用除草剂。我国于1956年开始试验化学除草,农村实行联产承包生产
Harms of farmland weeds are great. According to the UN Food and Agriculture Organization (FAO) estimates, the world’s agriculture is affected by grass cut nearly 10%, so the developed countries in the world regard the chemical control of farmland weeds as a major measure of agricultural production. All the Japanese paddy fields have used chemical weeding, the United States and the Soviet Union in addition to more than 50% of the area, 95% of the area of the United Kingdom food crops using herbicides. Our country started experimenting with chemical weeding in 1956, and rural contractual co-production was implemented