多杀霉素在甘蓝和土壤中的残留分析及消解动态  

The Residues Analysis and Dissipation Dynamics of Spinosad in Cabbage and Soil

作　　者：简秋[1] 朱光艳[1] 郑尊涛[1] 

机构地区：[1]农业部农药检定所,北京100125

出　　处：《农药》2015年第1期51-52,65,共3页Agrochemicals

摘　　要：[目的]为25％多杀霉素悬浮剂在甘蓝上的安全合理使用提供可靠依据。[方法]建立多杀霉素在甘蓝和土壤中的残留检测方法，并测定在甘蓝和土壤中的消解动态和最终残留。[结果]方法的准确度和精密度符合残留检测要求，在甘蓝中消解半衰期为1．7-2．6d，在土壤中消解半衰期为1．6～2．3d。按剂量200、300ga．i．／hm^2,施药3～4次，间隔7d，末次施药后7d，在甘蓝中的残留量〈0．08mg／kg，在土壤中的残留量〈0．05mg／kg。[结论]建立的检测方法准确可靠，甘蓝收获时残留量低于中国规定的最大残留限量（MRL）。[Aims] The aims were to provide guidance for reasonable use of spinosad 25% SC on cabbage. [Methods] The method for determination of spinosad residues in cabbage and soil was developed. In addition, the final residue and dissipation dynamics of spinosad in cabbage and soil were studied. [Results] The accuracy and precision of the method accorded with the requirement of pesticide residue analysis. The half-lives of spinosad in cabbage and soil were 1.7-2.6 d and 1.6-2.3 d, respectively. As the spinosad was sprayed for 3 to 4 times continuously at application dose of 200 and 300 g a.i.Paa with the interval of 7 d, the residues of spinosad in cabbage and soil at 7 d alter the last application were below 0.08 and 0.05 mg/kg, respectively. [Conclusions] The method is accurate and reliable. The residue of spinosad in harvested cabbage was below the maximum residue limit（MRL） in China.

关 键 词：多杀霉素 甘蓝 土壤 残留 消解动态 

分 类 号：TQ450.26[化学工程—农药化工]