“中性油”是有机磷杀虫剂——乐果的中间产物,含多种二甲基硫代或氧代磷酸酯衍生物(如○一○一二甲基二硫代磷酸甲酯)。一向做废弃物处理,排放于江河,严重污染地面水、下水道和周围环境,威胁人民健康。在开展“三废”综合利用时,发现它对甘蔗害虫绵蚜有一定杀灭作用。为化害为利,我们对“中性油”进行了一些初步的毒理学方面的探讨和杀虫效果试验,现简报如下: “Neutral oil” is an intermediate of organophosphorus insecticide-dimethoate, containing a variety of dimethylthio or oxophosphate derivatives (such as o-methyl methyl phosphorodichloridothioate) . Disposal of waste has always been done and discharged to the rivers, causing serious pollution to surface water, sewers and the surrounding environment, threatening people’s health. In carrying out the “three wastes” comprehensive utilization, found that it has a certain killing effect on cotton aphid cotton aphid. For the sake of harm, we carried out some preliminary toxicological studies on “neutral oil” and tests on insecticidal effects. The briefing is as follows: