72%吡蚜酮·异丙威WG在稻田环境中的残留动态  

Residual Detection and Dynamics of Pymetrozine.Isoprocarb 72% WG in Rice

作　　者：郑伟[1] 王彦辉[1] 李欣[1] 彭亚军[1] 周小毛[1] 廖晓兰[1] 柏连阳[2] 

机构地区：[1]湖南农业大学农药研究所,长沙410128 [2]湖南人文科技学院,湖南娄底417000

出　　处：《农药》2011年第10期745-747,共3页Agrochemicals

基　　金：国家现代麻类产业体系专项(nycytx-19-E09);国家自然基金资助项目(30971936)

摘　　要：[目的]为了评价吡蚜酮、异丙威在水稻上残留动态和环境安全性。[方法]2009-2010年在湖南、福建、广西进行了残留动态试验，建立了高效快速检测方法。吡蚜酮样品用乙腈-丙酮（体积比85：15）提取，经Pesticarb／NH2柱净化，HPLC—UV检测；异丙威样品用丙酮、二氯甲烷提取，浓缩净化后，GC—FID检测。【结果】2年3地消解动态试验结果显示：吡蚜酮在土壤、植株中的残留消解半衰期分别为2．6-5.3、0．8-1．6d；异丙威在土壤、植株中的残留消解半衰期分别为1．7-4．1、0．8～2．6d。【结论】推荐剂量和1．5倍推荐剂量，各施药2、3次，收获期取样检测吡蚜酮和异丙威，各样品均未检测出。72％吡蚜酮·异丙威WG在水稻上使用安全。The purpose of this paper was to study residual dynamics and environmental safety of pymetrozine and isoprocarb in rice ecosystem. [Methods] The field trials on the dissipation and final residue of pymetrozine.isoproearb 72% WG were carried out in Hunan, Fujian and Guangxi province during 2009-2010. The samples of pymetrozine were extracted with aeetonitrile and acetone（85：15, by vol）, concentrated and cleaned up by Pesticarb/NH2 SPE tubes, and determined using LC equipped with UV; the samples of isoprocarb were extracted with acetone and dichlormethane, concentrated and cleaned up, and determined using GC equipped with FID. [Results] The results showed that the half-lives of pymetrozine were 2.6- 5.3 d in soil, 0.8-1.6 d in paddy plants; and the half-lives of isoprocarb were 1.7-4.1 d in soil, 0.8-2.6 d in paddy plants of Hunan, Guangxi and Fujian province during two years, respectively. [Conclusions] No pymetrozine and isoprocarb residues were detected in rice at harvest season at recommended dose and 1.5 times recommended dose after treated 2 or 3 times. In conclusion, pymetrozine and isoprocarb 72% WG is safe in rice at recommended dose.

关 键 词：吡蚜酮 异丙威 水稻 消解动态 残留分析 

分 类 号：TQ450.263[化学工程—农药化工]