探讨克螨特在不同茶类品种上茶叶残留量与半衰期的差异,结果表明；药后15 d 365～1 460 mag· L-1浓度处理的绿茶与乌龙茶降解率分别为94.92％～98.43％和63.73％～87.97％,说明克螨特在绿茶比在乌龙茶茶梢上半衰期更短、降解速率更快、残留量更低；在不同区域乌龙茶中的残留也存在差异,可能与不同茶树品种生长速率不同有关；克螨特的使用安全间隔期,绿茶品种为15d,与国家原定的标准相符,而乌龙茶安全间隔期应大于15d.%Residues in teas and half-life of the insecticide, Propargite, were tested. Propargite degraded ranging from 94. 92% to 98. 43% on green teas and 63. 73% to 87. 97% on Oolong teas 15 days after the insecticide was sprayed at 365 — 1 460 mg · L-1 dilutions. Thus, Propargite had a shorter half-life, higher degradation rate and less residues left on the green teas than the Oolong teas. In addition, it was found that the level of Propargite residues differed by the regions, where the Oolong teas were grown. The primary reason for the variation might be due to the difference in tea varieties of varied growth rates. According to this study, the spraying of Propargite could be held 15 days prior to harvest for the green teas, which is what stipulated by the national regulation. On the other hand, for the Oolong teas, the lead time seemingly should be more than 15 days to be safe.
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