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dc.contributor.authorLentola, Andrea
dc.contributor.authorGiorio, Chiara
dc.contributor.authorBogialli, Sara
dc.contributor.authorRoverso, Marco
dc.contributor.authorMarzaro, Matteo
dc.contributor.authorGirolami, Vincenzo
dc.contributor.authorTapparo, Andrea
dc.date.accessioned2021-09-25T15:39:08Z
dc.date.available2021-09-25T15:39:08Z
dc.date.issued2020-09-25
dc.date.submitted2020-05-20
dc.identifier.issn1610-3653
dc.identifier.others10311-020-01098-3
dc.identifier.other1098
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/328531
dc.descriptionFunder: Università degli Studi di Padova
dc.description.abstractAbstract: Systemic insecticides such as neonicotinoids are widely used in seed coating practices for pest control in many crops, e.g., corn. Their success is due to their ability to protect the whole plant, from the roots to the upper leaves, but their use at high amounts is causing possible adverse effects on non-target animals exposed to contaminated pollen, nectar, leaves, and dust emitted during sowing. In 2018, the European Union banned some neonicotinoids and fipronil as seed coating insecticides in open fields. Consequently, the methylcarbamate methiocarb and less-toxic neonicotinoids, e.g., thiacloprid, have been authorized and largely used as alternative pesticides for corn seed coating. Here, an analytical protocol based on QuEChERS extraction/purification procedure and analysis by liquid chromatography-mass spectrometry has been optimized for the identification and the quantification of methiocarb, thiamethoxam, thiacloprid, and their metabolites in guttation drops, the xylem fluid excreted at leaf margins, and in leaves of corn plants grown from coated seeds. Although methiocarb is a non-systemic pesticide, we unexpectedly found high concentrations of its metabolites in both guttations and leaves, whereas methiocarb itself was below detection limits in most of the samples. The methiocarb main metabolite, methiocarb sulfoxide, was found at a mean concentration of 0.61 ± 1.12 µg mL−1 in guttation drops and 4.4 ± 2.1 µg g−1 in leaves. Conversely, parent compounds of neonicotinoids (thiamethoxam, thiacloprid) are systemically distributed in corn seedlings. This result raises safety concerns given that methiocarb sulfoxide is more toxic than the parent compound for some non-target species.
dc.languageen
dc.publisherSpringer International Publishing
dc.subjectOriginal Paper
dc.subjectMethiocarb
dc.subjectGuttations
dc.subjectMetabolites
dc.subjectSystemic insecticides
dc.subjectCorn coated seeds
dc.subjectUHPLC-HRMS
dc.titleMethiocarb metabolites are systemically distributed throughout corn plants grown from coated seeds
dc.typeArticle
dc.date.updated2021-09-25T15:39:07Z
prism.endingPage1892
prism.issueIdentifier2
prism.publicationNameEnvironmental Chemistry Letters
prism.startingPage1887
prism.volume19
dc.identifier.doi10.17863/CAM.75979
dcterms.dateAccepted2020-09-09
rioxxterms.versionofrecord10.1007/s10311-020-01098-3
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
dc.contributor.orcidLentola, Andrea [0000-0002-5691-179X]
dc.contributor.orcidGiorio, Chiara [0000-0001-7821-7398]
dc.contributor.orcidBogialli, Sara [0000-0002-9152-3602]
dc.contributor.orcidRoverso, Marco [0000-0003-1264-8878]
dc.contributor.orcidTapparo, Andrea [0000-0001-8928-705X]
dc.identifier.eissn1610-3661


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