The dissipation of Kresoxim-methyl in cucumber and soil under open conditions

摘要：

　　The dissipation and residue levels of kresoxim-methyl in cucumber and soil under field conditions were investigated at three primary cucumber-growing regions in China.Samples were extracted with acetonitrile and determined by gas chromatography with electron capture detector (ECD).Recoveries were between 95% and 109% with RSD 1.8-2.4% in cucumber and 90-99% with RSD of 1.4-2.2% in soil at spiked levels of 0.005, 0.05, 0.5 and 5.0 mg/kg, respectively.The limit of detection of kresoxim-methyl was 1.2× 10-12 g.The dissipation rates of kresoxim-methyl were described using first-order kinetic and its half-life ranged from 1.6 to 4.2 days in cucumber and 2.4-6.2 days in soil.At harvest times, the final residues of kresoxim-methyl were far below the China maximum residue limit (MRL, 0.5 mg kg-1) in cucumber when measured 3-7 days after final application, which suggested that the use of this fungicide was safe for humans.

关键词： kresoxim-methyl cucumber Soil Dissipation Residue

作者: Chunqiang Ruan Runqi Pei Zhihua Su He Zhang Chenglan Liu

作者单位: Key Laboratory of Natural Pesticide and Chemical Biology,Ministry of Education,South China Agricultural University,Guangzhou,510642,China

会议类型: 国内会议

会议名称: 第十四届全国农药学科教育科研研讨会暨赵善欢学术思想与研究实践讨论会

会议地点: 广州

会议语种:英文

页码: 34-37

在线出版日期: 2014-08-03（万方平台首次上网日期，不代表论文的发表时间）