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随着现代农业的发展，除草剂的应用越来越广泛。化学除草剂的大面积应用使农田草害得到了较好的控制，提高了劳动生产率，但也相应地带来了一些问题，主要表现在以下几个方面。第一、杂草的抗药性。到目前为止，世界上至少已有１００种以上杂草对多种类型的除草剂产生了抗性，?
With the development of modern agriculture, herbicides are used more and more widely. The large-scale application of chemical herbicides has led to better control of farmland weeds and increased labor productivity, but also brought some problems correspondingly, which are mainly manifested in the following aspects. First, weed resistance. So far, at least 100 species of weeds in the world have been resistant to many types of herbicides,?