杀虫药剂按其进入虫体的途径,有胃毒剂、触杀剂、熏蒸剂之分。但较合理的分类方法是按其毒理作用来分类。据此,可分为原生质毒剂、神经毒剂、呼吸毒剂、生殖毒剂等等。研究发现,熏蒸剂一般或主要作为呼吸毒剂对虫体发生作用。因此,有必要了解害虫正常呼吸生理活动,在此基础上来探析档案熏蒸杀虫剂致死害虫的机理。其中着重提出了对磷化氢毒理的看法。 Insecticidal agents into the worm by its approach, with stomach poison, touch agent, fumigation points. However, a more reasonable classification method is classified according to its toxicological effects. Accordingly, can be divided into protoplasts, nerve agents, respiratory agents, reproductive agents and so on. The study found that fumigants generally or mainly as respiratory drugs on the role of parasites. Therefore, it is necessary to understand the physiological activities of pests normal breathing, on the basis of which to analyze the mechanism of fumigation insecticides lethal file insects. Which highlighted the view of phosphine toxicity.