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 ...
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
关键词
精甲霜灵
西红柿
气相色谱法
残留
降解
metalaxyl-M
tomato
gas chromatogram
residue
degradation
