Dissipation, occurrence, and risk assessment of 12 pesticides in Dendrobium officinale Kimura et Migo

被引：33

作者：

Fu, Yan ^{[1
]}

Wang, Quansheng ^{[1
]}

Zhang, Liang ^{[1
]}

Ling, Shuping ^{[1
]}

Jia, Huiyan ^{[1
]}

Wu, Yinliang ^{[1
]}

机构：

[1] Ningbo Acad Agr Sci, Ningbo 315040, Peoples R China

来源：

ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY | 2021年 / 222卷

关键词：

Pesticides; Dissipation; Dendrobium officinale Kimura et Migo; Dietary risk assessment; PYRACLOSTROBIN; POLYSACCHARIDE; CHROMATOGRAPHY; RESIDUES; BEHAVIOR; SOIL;

D O I：

10.1016/j.ecoenv.2021.112487

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The residual behaviors and dietary risk probability of 12 pesticides in Dendrobium officinale Kimura et Migo cultivated at two representative locations under green house conditions were investigated using liquid chromatography-tandem mass spectrometry. Field trials showed that the half-lives of 12 pesticides ranged from 0.9 to 14.4 days in fresh D. officinale stems. Based on maximum residue levels (MRLs), the ultimate residues of imidacloprid, dimethomorph, metalaxyl, tebuconazole, and cyazofamid at a pre-harvest interval (PHI) of 28 days were within acceptable limits. For abamectin, indoxacarb, and difenoconazole, 35-day PHIs were needed. The PHIs of trifloxystrobin and fluopyram were 42 days, the time required for their residues to be reduced to an MRL of 4 mg/kg. The chronic and acute risk quotients of target pesticides at PHIs of 28-42 days were below 5.929% and 0.532%, respectively, showing that the evaluated D. officinale exhibited an acceptably low dietary risk to the general population.

引用

页数：8