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

Title data

Schott, Matthias ; Bischoff, Gabriela ; Eichner, Gerrit ; Vilcinskas, Andreas ; Büchler, Ralph ; Meixner, Marina Doris ; Brandt, Annely:
Temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees.
In: Scientific Reports. Vol. 7 (2017) Issue 1 .
ISSN 2045-2322
DOI: https://doi.org/10.1038/s41598-017-06259-z

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Animal Ecology I > Chair Animal Ecology I - Univ.-Prof. Dr. Christian Laforsch
Result of work at the UBT: No
DDC Subjects: 500 Science > 570 Life sciences, biology
500 Science > 590 Animals (Zoology)
Date Deposited: 16 Apr 2020 06:56
Last Modified: 16 Apr 2020 06:56
URI: https://eref.uni-bayreuth.de/id/eprint/54930