杀螟丹98%可溶性粉剂在甘蓝和土壤中的残留动态研究

Residual Dynamics of Cartop in Cabbage and Soil

通过大田试验及气相色谱分析 ,研究了杀螟丹在甘蓝和土壤中的残留动态。结果表明 :杀螟丹在甘蓝和土壤中的残留半衰期分别为 2 .8天和 2 .2天。按建议剂量 0 .0 75g/m2 和 2倍剂量 0 .15g/m2 施用杀螟丹 98%可溶性粉剂 ,使用 3次 ,采样距最后一次施药间隔期 7天时 ,甘蓝和土壤中的残留量分别为 0 .0 5 2 1,0 .0 0 5 7mg/kg和 0 .10 5 8,0 .0 0 12mg/kg。

In order to make the standards for safe use of cartop on cabbage, a farmland experiment was conducted to study the residual dynamics of cartop in cabbage and soil at doses of 0.075～0.15 mL/m 2, respectively. Results showed that cartop dissipated rapidly from cabbage and soil. Its half lives in cabbage and soil were 2.8 and 2.2 days. It was found that the final residues were 0.0521 0.1058 mg/kg in cabbage and 0.0057 0.0012 mg/kg in soil, respectively.