有机磷杀虫剂对农业害虫有较高的效力,近年来各国普遍地予以重视,但是其对人畜亦有较大的毒性,使用不当多发生中毒,因此有机磷杀虫剂的发展趋向是寻找杀虫效力高而毒性低的新制剂。1950年美国合成马拉松,1954年意大利合成乐果,一般认为其对哺乳类动物的毒性较小。我国亦开始试制生产及应用马拉松及乐果,但是马拉松及乐果的毒 Organophosphorus insecticides have higher efficacy on agricultural pests, and in recent years, they have been widely regarded by all countries, but they are also toxic to humans and animals. Poisoning occurs when they are used improperly. Therefore, organophosphate insecticides tend to look for New insecticide with high potency and low toxicity. Synthetic marathon in the United States in 1950, 1954 Italian synthetic dimethoate, generally considered less toxic to mammals. Our country also started trial production and application of marathon and dimethoate, but marathon and dimethoate poisoning