百菌清农药在蔬菜中的降解动态及残留规律研究

Study of chlorothalonil's degradation and residues in vegetables

为了研究有效控制蔬菜中百菌清农药残留量的对策,开展了不同季节、不同栽培方式下蔬菜中百菌清的降解试验,以揭示百菌清的降解规律;进行了夏季大棚蔬菜使用百菌清的安全间隔期试验并通过其各种使用方法在蔬菜中的残留量比较试验,研究其在蔬菜中的残留动态。结果表明,百菌清的降解具有明显的吸收特点和季节性差异;夏季大棚蔬菜使用百菌清的安全间隔期为8 d;百菌清的使用方法明显影响其在蔬菜中的残留量,其残留量的大小依次为喷雨>弥雾>粗喷雾>烟熏。

In order to study the countermeasure for effectual control chlorothalonil＇s residues in vegetables, chlorothalonil＇s degradation and residues in vegetables by different seasons under different cultivations were studied. The result showed that chlorothalonil ＇s degradation had clearly absorbing characteristic and seasonal discrepancy,different applications of chlorothalonil influenced its residues in vegetables, as sprinkle rainy produced highest residures, permeate, spray, smoke were in order of decreasing.