Dissipation and Dietary Risk Assessment of Thiacloprid and Tolfenpyrad in Tea in China

文献类型： 外文期刊

第一作者： Wang, Weitao

作者： Wang, Weitao;Gao, Di;Long, Jiahuan;Long, Hui;Zhang, Ying;Chen, Hongping;Chen, Hongping

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关键词： thiacloprid; tolfenpyrad; tea; dietary risk assessment

期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）

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年卷期： 2022 年 12 卷 12 期

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收录情况： SCI

摘要： Pesticides are widely used to maintain tea yields. For achieving satisfactory effects on pests, multiple pesticides in a low application dose have been the trend at present. In this study, we investigated the dissipation and dietary risk assessment of thiacloprid and tolfenpyrad. A method for the determination of thiacloprid and tolfenpyrad was developed. The recoveries ranged from 73% to 105% with standard deviations between 0.7% and 8.3%. Limits of quantification were 0.01 mg/kg for both pesticides. Field trials were conducted in China in 2021. The half-lives were in ranges of 3.22 to 8.45 days for thiacloprid and 2.91 to 10.50 days for tolfenpyrad. The terminal residues were in the range of 0.04-2.55 mg/kg for thiacloprid and <0.01-4.00 mg/kg for tolfenpyrad, respectively. Finally, a dietary risk assessment was conducted representing the acceptable risk of the two pesticides, which of ratios were all less than 100%. The safe pre-harvest interval of 14 days was suggested. This study can serve as a guide for the rational application of thiacloprid and tolfenpyrad in tea, which also ensures the safety of human health.

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