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Residual Dynamics and Safe Usage Technologies of Indoxacarb in Cowpea
Author(s): 
Pages: 46-49
Year: Issue:  2
Journal: SUBTROPICAL PLANT SCIENCE

Keyword:  豇豆茚虫威残留消解动态安全使用技术;
Abstract: 采用气相色谱(GC-ECD)分析法,研究15%茚虫威(安打)乳油在豇豆中的残留消解动态和安全使用技术.该方法最小检出量为0.01ng,最低检出浓度为0.005mg/kg;添加回收率分别为84.7%~92.8%,RSD为3.43%~5.27%.残留消解动态表明,茚虫威在豇豆中的原始沉积量间隔7d连续施用2次>施用1次;残留消解动态均符合一级动力学方程,茚虫威施用1次的消解动态方程为C=2.7180·e-0.2500t,半衰期(DT50)为2.8d,消解99%所需时间T0.99为18.4d;施用2次的消解动态方程为C=2.3712·e-0.2404t,DT50为2.9d,T0.99为19.2d.在豇豆采收期施用茚虫威有效成分48.21g/hm2 1次,或间隔7d连续施用2次,在末次施药后11d采集豆荚样品检测,残留量均<0.2mg/kg,平均残留量分别为0.103mg/kg和0.111mg/kg,产品质量安全水平符合日本最高残留限量(MRL)的要求.
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