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二、科学使用农药 在农业害虫综合防治中,化学防治是重要的组成部分。近年来,有些地区由于不合理地使用化学农药,给农田生态系带来了种种不良影响(即三“R”问题)。因此,科学使用农药,充分发挥化学防治害虫的长处,避免或减少农药的副作用,保证农作物优质、稳产、高产、低耗,这是植保工作者的任务。 (一)讲究防治策略 化学防治要从全局观点出发,考虑到总体防治效果,这就是根据各地的耕作制度和害虫的发生消长型相,确定造成危害损失的时期和代别,制订出合理的防治策略。
Second, the scientific use of pesticides In the integrated management of agricultural pests, chemical control is an important part. In recent years, due to the unreasonable use of chemical pesticides in some areas, various adverse effects have been brought to the agroecosystems (ie the three “R” problems). Therefore, the scientific use of pesticides, give full play to the advantages of chemical pest control, to avoid or reduce the side effects of pesticides to ensure high quality crops, stable production, high yield and low consumption, which is the plant protection workers task. (A) Pay attention to the prevention and control strategy Chemical control from the overall point of view, taking into account the overall control effect, which is based on the farming system and pest occurrence and decline around the phase, to determine the harm caused by the loss of time and on behalf of the development of a reasonable control Strategy.