Residue behavior and risk assessment of imidacloprid applied on greenhouse-cultivated strawberries under different application conditions
文献类型： 外文期刊
作者： Cang, Tao 1 ; Sun, Caixia 1 ; Zhao, Hua 1 ; Tang, Tao 1 ; Zhang, Changpeng 1 ; Yu, Ruixian 2 ; Wang, Xinquan; Wang, Qi 1 ;
作者机构： 1.Zhejiang Acad Agr Sci, State Key Lab Breeding Base Zhejiang Sustainable, MOA Key Lab Pesticide Residue Detect, Inst Qual & Standard Agroprod, 198 Shiqiao Rd, Hangzhou 310021, Zhejiang, Peoples R China
2.Zhejiang Acad
关键词： Imidacloprid; Strawberry; Safety evaluation
期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）
ISSN： 0944-1344
年卷期： 2018 年 25 卷 5 期
页码：
收录情况： SCI
摘要： A risk assessment for imidacloprid applied on strawberries under different conditions was performed after residue determination using the quick, cheap, effective, rugged, and safe (QuEChERS) method. The application conditions were varied according to the applied dosage, addition of a plant oil or organosilicon surfactant, water volume, and sprayer type. The degradation dynamics of imidacloprid on strawberries followed first-order kinetics. At applied doses of 30-60 g a.i. ha(-1), the half-lives of imidacloprid were 2.89-3.46, 1.98-3.65, and 2.57-2.77 days after application without a surfactant or with a plant oil or organosilicon surfactant, respectively. For water volumes of 112.5, 225, 450, 675, and 900 L ha(-1), the half-lives of imidacloprid applied in the presence of the plant oil surfactant were 3.30, 7.70, 5.33, 7.70, and 6.30 days, respectively. The half-lives after application with a knapsack mist duster, electric sprayer, and manual sprayer were 2.16, 5.77, and 7.70 days, respectively. The health risk assessment revealed risk quotients less than 1 in all cases, indicating that the application of imidacloprid poses a low health risk to humans after a pre-harvest interval of 10 days under our application conditions. The risk assessment results can provide reference data for setting a reasonable maximum residue limit for imidacloprid on strawberries in China.
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