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近年来,随着用药范围、用药数量的增多,害虫抗性越来越突出,特别在一些大田连片连作地区,像一些棉区、稻田,很多害虫已对某些药物产生了很大的抗性,出现了这些药物防治效果下降甚至不管用的程度。这里面跟农民用药习惯不良和缺乏科学用药知识,以及基层个别经销商不科学的有意误导或错误指导有着很大关系。主要表现在:一是很多农民一旦认为某种农药效果较好,就会连年购买,一年四季使用。像吡虫啉、氧化乐果、功夫等等
In recent years, pest resistance has become increasingly prominent as the range of drugs and the amount of drugs increased. Especially in some contiguous areas of fields, like some cotton areas and paddy fields, many pests have become very resistant to certain drugs Sexuality, there has been a decline in the effectiveness of these drugs or even useless extent. There is a lot to do with the poor habits of peasants and the lack of knowledge of scientific medication, as well as the deliberate misleading or wrong guidance of unscientific individual grassroots dealers. Mainly manifested in: First, many farmers, once considered a better pesticide, will be purchased year after year, year after year use. Like imidacloprid, omethoate, kung fu and more