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过去防治耕地杂草是采取“完全消灭”的作法,但是有时杂草对作物产量并不造成影响,因此,把农田杂草控制到无害的程度就可以了,从而出现了“控制杂草”的防治概念。今后需要确立杂草的允许界限量和新的杂草诊断标准。随着除草剂的发展和用量的逐年增加,它对环境的污染,对生态系统的破坏等公害问题也日益增加,因此人类开始重视杂草的综合防治。杂草综合防治应该是以应用除草剂为主,并利用生物防治和物理防治方法辅助化学防治。
In the past, the control of arable land weeds was a “complete elimination”, but sometimes weeds do not have an impact on crop yield, therefore, to control the degree of harm to farm weeds on it, resulting in “control Weed ”prevention concept. In the future, we need to establish the allowable limits of weeds and new weed diagnostic criteria. With the development of herbicides and the increase of the dosage, the pollution problems such as environmental pollution and damage to the ecosystem are also increasing day by day. Therefore, mankind has begun to pay attention to the comprehensive prevention and control of weeds. Weed control should be based on the application of herbicides, and use of biological control and physical control methods to assist chemical control.