秋大白菜害虫发生种类较多,循环危害频繁,可直接危害和产生传播病毒、病菌的间接危害。常用防治措施中往往采用实用有效的药防法。在药防措施中,为确保食用安全,其一是选用高效、低毒、低残留的无公害农药。再是严格遵守“农药合理使用准则”;掌握好可用农药种类、该药的单位面 Autumn cabbage pests occur more frequently, the cycle of harmful, can directly harm and produce indirect transmission of viruses, pathogens. Common control measures are often used in effective and effective anti-drug law. In drug prevention measures, in order to ensure food safety, one is the selection of highly efficient, low toxicity, low residual pollution-free pesticides. Is strictly followed “Guidelines for the rational use of pesticides”; have a good grasp of the types of pesticides available, the unit of medicine