氯虫苯甲酰胺在甘蓝和土壤中的残留及消解动态

参照《农药残留试验准则》,采用田间试验方法,研究了济南和杭州两年两地的氯虫苯甲酰胺在甘蓝和土壤中的消解动态和最终残留。结果表明,氯虫苯甲酰胺最终残留在甘蓝、土壤中的质量分数分别是〈0.297 mg.kg-1,〈0.097 mg.kg-1;在甘蓝、土壤中的降解均符合一级动力学方程,降解半衰期分别为7.2～8.9 d和6.9～10.7 d;统计分析表明,两地区甘蓝中的残留消解行为无显著性差异,土壤中的残留消解行为差异性显著,土壤性质的不同是影响消解过程的主要因素。文章为制定该农药在甘蓝上最大残留限量标准和合理使用准则以及风险评估提供了科学依据。

Residues and degradation of chlorantraniliprole in cabbage and soil

Residues and degradation of chlorantraniliprole in cabbage and soil were studied in Jinan and Zhejiang in two years.Field trial was designed according to The Guideline on Pesticide.The residues in cabbage and soil were not more than 0.297 mg·kg-1,0.097 mg·kg-1 respectively.The degradation of chlorantraniliprole in cabbages and soils followed the first-order kinetics.The half lives of chlorantraniliprole in cabbage and soil were 7.2-8.9 d and 6.9-10.7 d respectively.Similar degradation magnitude of chlorantraniliprole in cabbage was found in Shandong and Zhejiang,while the processes of dissipation in soil were significantly different between the two places.and characters of soil played an important role in pesticide dissipation.The study provided scientific base for setting up the Maximum Residue Limit of the pesticide in cabbage,the guidance of safe application and the estimation of maximum residue level.