本文就蔬菜上常用的有机磷农药(乐果、敌敌畏和杀螟松)于1983年在长春市郊区主要蔬菜中残留降解动态规律进行了考察。汇总了共S2个残留降解动态田间试验区中近550个样品800个残留量测定数据,并通过数理统计分析和残留曲线经验公式求得其在各类蔬菜上的残留半衰期。试验证明施药后24小时消失率一般可达50％以上,而敌敌畏4—8小时即达一半以上,它在白菜上残留时间最长,需5天才能完全消失。残留期最长的是乐果,完全消失需15天。 In this paper, the commonly used organic phosphorus pesticides on vegetables (dimethoate, dichlorvos and fenitrothion) in 1983 in the suburbs of Changchun City, the main vegetable residue degradation dynamics. A total of 800 residue samples from nearly 550 samples in a total of S2 residue degradation dynamic field trials were collected and their residual half-lives on various vegetables were determined by mathematical statistics and residual curve empirical formulas. Test shows that the disappearance rate of 24 hours after application of up to 50% or more, while the dichlorvos 4-8 hours that is up to more than half, it is the longest remaining in cabbage, take 5 days to completely disappear. The longest residue is dimethoate, disappear completely 15 days.