防除杂草是发展农业、保证人畜健康和环境优美的重要措施。过去,杂草的防除主要是依靠人工拔除以及借助各种机具和农业技术措施。而今,随着科学技术的发展,化学除草剂已经被广泛应用,并且对控制杂草的危害,保证农业生产起了很大作用。但是,化学除草剂的生产,不仅需要耗费大量的能源,而且大量使用还会破坏生态平衡, The prevention and control of weeds is an important measure to develop agriculture, ensure the health of human beings and livestock and beautify the environment. In the past, the control of weeds mainly relied on manual removal and through various implements and agro-technical measures. Now, with the development of science and technology, chemical herbicides have been widely used, and to control the hazards of weeds, to ensure that agricultural production played a significant role. However, the production of chemical herbicides not only consumes a large amount of energy but also damages the ecological balance in large quantities.