Translocation and dissipation of thiamethoxam applied by root irrigation in tomato plant-soil system
文献类型： 外文期刊
作者： Li, Li 1 ; Liang, Hongwu 2 ; Pan, Wei 1 ; Yin, Shijie 1 ; Cao, Junli 3 ; Li, Jindong 3 ;
作者机构： 1.Shanxi Agr Univ, Coll Plant Protect, Shanxi Key Lab Integrated Pest Management Agr, Taiyuan 030031, Peoples R China
2.Inner Mongolia Univ, Sch Ecol & Environm, Inner Mongolia Key Lab Environm Pollut Control & W, Hohhot 010021, Peoples R China
3.Shanxi Agr Univ, Shanxi Ctr Testing Funct Agroprod, Taiyuan 030031, Peoples R China
关键词： Thiamethoxam; Clothianidin; Root irrigation; Tomato; Translocation
期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 2022影响因子：5.8； 五年影响因子：5.4 ）
ISSN： 0944-1344
年卷期： 2023 年
收录情况： SCI
摘要： Thiamethoxam (TMX) has been registered for use on a wide range of crops due to its versatile application methods, however, there is limited literature evaluating the residue behaviors of TMX applied through root irrigation. In this study, the uptake and translocation of TMX, its degradation to clothianidin (CLO), and dissipation in the tomato plant-soil system were conducted. TMX applied by root irrigation was transferable within the tomato plant, including stems, leaves, and fruits at different heights. TMX concentrations in the four sections of stems were ordered as C-lower > C-mid > C-upper > C-top, while in the leaves were ordered as C-top > C-upper > C-mid > C-lower. The degradation product CLO was detected in the tomato plant, and concentrations of CLO were even higher than those of TMX in the leaves. The translocation factor (TF) of TMX in the same section generally followed the order of TFleaf > TFstem > TFfruit. Residues of TMX and CLO in tomato on 7 days after application were below maximum residue limits (MRLs) in China and Codex Alimentarius Commission (CAC). This study promotes the evaluation of TMX applied through root irrigation for use in the tomato system from a dietary safety perspective.
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