Universität zu Köln

Schott, Matthias, Bischoff, Gabriela, Eichner, Gerrit, Vilcinskas, Andreas, Buechler, Ralph, Meixner, Marina Doris and Brandt, Annely ORCID: 0000-0002-2583-3530 (2017). Temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees. Sci Rep, 7. LONDON: NATURE PUBLISHING GROUP. ISSN 2045-2322

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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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Schott, Matthias UNSPECIFIED UNSPECIFIED UNSPECIFIED Bischoff, Gabriela UNSPECIFIED UNSPECIFIED UNSPECIFIED Eichner, Gerrit UNSPECIFIED UNSPECIFIED UNSPECIFIED Vilcinskas, Andreas UNSPECIFIED UNSPECIFIED UNSPECIFIED Buechler, Ralph UNSPECIFIED UNSPECIFIED UNSPECIFIED Meixner, Marina Doris UNSPECIFIED UNSPECIFIED UNSPECIFIED Brandt, Annely UNSPECIFIED orcid.org/0000-0002-2583-3530 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-224763
DOI:	10.1038/s41598-017-06259-z
Journal or Publication Title:	Sci Rep
Volume:	7
Date:	2017
Publisher:	NATURE PUBLISHING GROUP
Place of Publication:	LONDON
ISSN:	2045-2322
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TOXICITY; BEES; HYMENOPTERA; FIPRONIL; EXPOSURE; BIODIVERSITY; METABOLITES; PESTICIDES; DECLINES; SURVIVAL Multiple languages Multidisciplinary Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/22476