Evaluation of the safe application of copper nonylphenolsulfonate and hexaconazole in wax gourd under field conditions

文献类型： 外文期刊

第一作者： Duan, Lifang

作者： Duan, Lifang;Li, Runan;Pan, Xinglu;Tao, Yan;Wu, Xiaohu;Xu, Jun;Liu, Xingang;Dong, Fengshou;Zheng, Yongquan;Duan, Lifang

作者机构：

关键词： Copper nonylphenolsulfonate; Hexaconazole; Wax gourd; Soil; Dissipation; Evaluation

期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.291； 五年影响因子：6.393 ）

ISSN： 0147-6513

年卷期： 2018 年 159 卷

页码：

收录情况： SCI

摘要： Wax gourd is a popular vegetable and the new organic copper pesticide product of copper nonylphenolsulfonate and hexaconazole was firstly recommended to control the serious disease powdery mildew frequently occurred in wax gourd. However, it is still a concern for data deficiency of residue amounts of these two pesticides in edible portion of wax gourd and the persistence in environment. In this study, the dissipation and residue of copper nonylphenolsulfonate and hexaconazole in wax gourd and soil were investigated. The experiment results demonstrated that the dissipation half-lives of copper nonylphenolsulfonate and hexaconazole in wax gourd and soil were 4.6-5.8 days and 7.1-21.7 days, respectively. After 3 days from the last treatment, the residues of copper nonylphenolsulfonate were below 0.38 mg kg(-1) in wax gourd and were below 0.21 mg kg(-1) in soil, and the residues of hexaconazole ranged from < 0.01 to 0.19 mg kg in wax gourd and from 0.01 to 0.63 mg kg(-1) in soil. The long-term dietary risk assessment was done based on the supervised trial median residue and Chinese dietary pattern combining corresponding standards, by comparing with national estimated daily intake, the results showed that it was safe to use copper nonylphenolsulfonat-exaconazole 20% microemulsion (ME) at the dosage of 420 g a.i. ha(-1) with the pre-harvest interval of 3 days in China. And it also supplied authorities with important data for establishing MRL standards of copper nonylphenolsulfonate and hexaconazole in wax gourd in China.

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