Elevated accumulation and distinct migration patterns of neonicotinoids compared to traditional insecticides in South China typical orchard  

作　　者：Shiming Song Xu Li Fenghua Wei Jiye Zhang Henglin Zhang Haibao Huang Yuankai Guo Tao Zhang 

机构地区：[1]School of Environmental Science and Engineering,Sun Yat-Sen University,Guangzhou,510275,China [2]School of Chemistry and Environment,Jiaying University,Meizhou,514015,China

出　　处：《Emerging Contaminants》2024年第4期207-217,共11页新兴污染物(英文)

基　　金：The Natural Science Foundation of China(No.22022612,No.22036004,No.22306209,and No.42307369);Natural Science Foundation of Guangdong Province,China(No.2020A0104006 and No.2021A1515010243);China Postdoctoral Science Foundation(No.2022M723587 and No.2023T160747);Department of Education of Guangdong Province(No.2021KQNCX087)are acknowledged for their partial research support.

摘　　要：The global insecticide market is undergoing significant changes,witnessing a surge in neonicotinoids(NEOs)usage,alongside the persistent application of traditional insecticides,such as organophosphates(OPs),carbamates(CMs)and pyrethroids(PYRs).In this study,therefore,NEOs,OPs,PYRs and CMs were measured in various pomelo tissues and paired soil and leaf samples collected from two pomelo orchards in South China.NEOs exhibited a higher median sum residue in pulp(∑NEOs:1.90 ng/g)than traditional insecticides(∑OPs:1.69 ng/g,∑CMs:0.49 ng/g,and ∑PYRs:0.33 ng/g).Principal component analysis indicated that NEO residues in pulp was primarily originated from deep soil.Moreover,the migration pathway of NEOs potentially extends from the deep soil to the plant's root system,then travels through the carpopodium to access the pulp,whereas traditional insecticides adhere to a migration pathway that progresses from the epicarp to the pulp.Tissue-specific distribution analysis revealed that NEOs exhibit an enhanced propensity for accumulation in the pulp.In contrast,traditional insecticides display a preference for accumulating in seeds and endocarp.This study first to delineate distinction in residue,migration,tissue-specific distribution between NEOs and traditional insecticides,heightened emphasis is warranted on NEOs and their metabolites within the ambit of the“One-Health”framework.

关 键 词：Residues Neonicotinoid insecticides POMELO Tissue-specific distribution Migration pathway 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]