精甲霜灵在西红柿上的降解残留研究  

Residue and Degradation of Metalaxyl-M in Tomato

作　　者：韩丙军[1] 汤建彪[1] 彭黎旭[1] 谢德芳[1] 刘洪升[1] 

机构地区：[1]中国热带农业科学院分析测试中心,海南海口571101

出　　处：《热带农业科学》2009年第1期23-26,共4页Chinese Journal of Tropical Agriculture

基　　金：海南省自然科学基金(808172);海口市科技局项目([2007]海科立0000073)资助

摘　　要：采用气相色谱法(氮磷检测器)测定精甲霜灵在西红柿果实上的残留量。结果表明,精甲霜灵在西红柿植株上施用以后降解较快;在西红柿果实上的消解遵循指数型降解规律,半衰期为1.74d;残留量与精甲霜灵施药量相关,残留浓度随着施药量增多而增高;施药4次处理与施药5次处理间无显著差异。以2倍试验农药厂家在西红柿上的推荐使用剂量(2248g/hm2)作施药处理,施药次数为5次,于最后1次施药2d后,精甲霜灵在西红柿果肉中的残留量为0.074mg/kg的分析结果表明,试验农药厂家推荐精甲霜灵在西红柿上施用的安全间隔期为3d是合适的。Field experiments were conducted to study residue and degradation of metalaxyl-M in tomato. Metalaxyl-M residues were quantified by GC-NPD. In Trial I,the metalaxyl-M degradation was detected after tomato was treated at the recommended dose level. In Trial II,effects of application rate and application times on the metalaxyl-M degradation in tomato. Metalaxyl-M degraded rapidly from tomato pulp after applied to the tomato plants,and its half-life was 1.74 d. When tomato plants were sprayed 5 times with the ...

关 键 词：精甲霜灵 西红柿 气相色谱法 残留 降解 

分 类 号：TQ450.263[化学工程—农药化工]