几种农药在茶叶上的残留动态

The Residue Dynamics of Several Pesticides in Tea

为了明确几种农药在茶叶上施用后的残留动态,于2014年研究了防治茶叶病虫害高效低毒的主要药剂的消解动态;采用新型静电喷雾器械对8种农药在茶叶上进行喷雾,分别在不同时间对茶叶取样并进行农药残留消解动态检测。试验结果表明,施药后2 h虫螨腈在茶叶中的残留降到了41.00 mg/kg,联苯菊酯1 d后在茶叶中的残留降到了2.90 mg/kg,均达到了欧盟规定的农药最大残留量(MRL)标准;在茶树上利用静电喷雾的方法进行施药,可以有效降低农药残留量,缩短茶叶采摘的安全间隔期,为茶园安全生产提供指导。

To elucidate the residue dynamics of several pesticides used in tea,the digestion dynamic of eight pesticides which are highly efficient and low-toxic were investigated in tea by new electrostatic spraying in2014. The results showed that the residue of bifenthrin decreased to 41. 00 mg / kg at 2 h after spraying,the residue of chlorfenapyr decreased to 2. 90 mg / kg at 1 d after spraying,and both were up to the maximal residue level enacted by European Union. The electrostatic spraying might effectively reduce the pesticide residues in tea,thus could shorten the safety interval period,which provided guidance for safe production of this crop.