自40年代后期发达国家广泛应用除草剂防除杂草以来,对提高劳动生产率,促进农业生产发展方面起了巨大的作用。但也发现单纯使用化学除草剂不能从根本上解决农田杂草的危害。因为一种除草剂不能防除所有的杂草,某些敏感种被消灭了,另一些抗性强的杂草却得到发展,从而形成所谓杂草种群变迁的“恶性循环”。而多次用药不仅药源缺乏,成本高,而且增加了对环境污染。此外,长期连续地使用某种除草剂又会使杂草形成抗性,给化学防除带来困难。为此,根据我国素有精耕细作和除草剂生产还较薄弱的特点,研究建立一套适 Since the extensive application of herbicides to control weeds in developed countries in the late 1940s, they have played a huge role in raising labor productivity and promoting the development of agricultural production. But also found that the simple use of chemical herbicides can not fundamentally solve the hazards of farmland weeds. Because one herbicide can not control all the weeds, some of the sensitive species have been eliminated and some more resistant weeds have developed, creating a “vicious circle” of so-called weed population changes. The drug is not only repeated lack of resources, high cost, but also increased the environmental pollution. In addition, the long-term continuous use of certain herbicides will make weeds resistant and cause difficulties in chemical control. To this end, according to our well-known intensive and herbicides production is still weak characteristics of research to establish a set of appropriate