Temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees

Abstract In cases of acute intoxication, honeybees often lay in front of their hives for several days, exposed to sunlight and weather, before a beekeeper can take a sample. Beekeepers send samples to analytical laboratories, but sometimes no residues can be detected. Temperature and sun light could...

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Autores principales:	Matthias Schott, Gabriela Bischoff, Gerrit Eichner, Andreas Vilcinskas, Ralph Büchler, Marina Doris Meixner, Annely Brandt
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4dd42de52b7748b7914010a766ee9030
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spelling	oai:doaj.org-article:4dd42de52b7748b7914010a766ee90302021-12-02T12:30:45ZTemporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees10.1038/s41598-017-06259-z2045-2322https://doaj.org/article/4dd42de52b7748b7914010a766ee90302017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06259-zhttps://doaj.org/toc/2045-2322Abstract In cases of acute intoxication, honeybees often lay in front of their hives for several days, exposed to sunlight and weather, before a beekeeper can take a sample. Beekeepers send samples to analytical laboratories, but sometimes no residues can be detected. Temperature and sun light could influence the decrease of pesticides in bee samples and thereby residues left for analysis. Moreover, samples are usually sent via normal postal services without cooling. We investigated the temporal dynamics of whole-body residues of imidacloprid in live or dead honeybees following a single-meal dietary exposure of 41 ng/bee under various environmental conditions, such as freezing, exposure to UV light or transfer of individuals through the mail system. Immobile, “dead” looking honeybees recovered from paralysis after 48 hours. The decrease of residues in living but paralysed bees was stopped by freezing (= killing). UV light significantly reduced residues, but the mode of transport did not affect residue levels. Group feeding increased the variance of residues, which is relevant for acute oral toxicity tests. In conclusion, elapsed time after poisoning is key for detection of neonicotinoids. Freezing before mailing significantly reduced the decrease of imidacloprid residues and may increase the accuracy of laboratory analysis for pesticides.Matthias SchottGabriela BischoffGerrit EichnerAndreas VilcinskasRalph BüchlerMarina Doris MeixnerAnnely BrandtNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Matthias Schott Gabriela Bischoff Gerrit Eichner Andreas Vilcinskas Ralph Büchler Marina Doris Meixner Annely Brandt Temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees
description	Abstract In cases of acute intoxication, honeybees often lay in front of their hives for several days, exposed to sunlight and weather, before a beekeeper can take a sample. Beekeepers send samples to analytical laboratories, but sometimes no residues can be detected. Temperature and sun light could influence the decrease of pesticides in bee samples and thereby residues left for analysis. Moreover, samples are usually sent via normal postal services without cooling. We investigated the temporal dynamics of whole-body residues of imidacloprid in live or dead honeybees following a single-meal dietary exposure of 41 ng/bee under various environmental conditions, such as freezing, exposure to UV light or transfer of individuals through the mail system. Immobile, “dead” looking honeybees recovered from paralysis after 48 hours. The decrease of residues in living but paralysed bees was stopped by freezing (= killing). UV light significantly reduced residues, but the mode of transport did not affect residue levels. Group feeding increased the variance of residues, which is relevant for acute oral toxicity tests. In conclusion, elapsed time after poisoning is key for detection of neonicotinoids. Freezing before mailing significantly reduced the decrease of imidacloprid residues and may increase the accuracy of laboratory analysis for pesticides.
format	article
author	Matthias Schott Gabriela Bischoff Gerrit Eichner Andreas Vilcinskas Ralph Büchler Marina Doris Meixner Annely Brandt
author_facet	Matthias Schott Gabriela Bischoff Gerrit Eichner Andreas Vilcinskas Ralph Büchler Marina Doris Meixner Annely Brandt
author_sort	Matthias Schott
title	Temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees
title_short	Temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees
title_full	Temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees
title_fullStr	Temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees
title_full_unstemmed	Temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees
title_sort	temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/4dd42de52b7748b7914010a766ee9030
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Temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees

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