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Informed Discussion of Beekeeping Issues and Bee Biology

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Subject:
From:
Peter L Borst <[log in to unmask]>
Reply To:
Informed Discussion of Beekeeping Issues and Bee Biology <[log in to unmask]>
Date:
Sat, 20 Sep 2014 09:02:36 -0400
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> Here we present a holistic screening of collapsing colonies from three professional apiaries in Spain. Colonies with typical honey bee depopulation symptoms were selected for multiple possible factors to reveal the causes of collapse.

> Omnipresent were Nosema ceranae and Lake Sinai Virus. Moderate prevalences were found for Black Queen Cell Virus and trypanosomatids, whereas Deformed Wing Virus, Aphid Lethal Paralysis Virus strain Brookings and neogregarines were rarely detected. Other viruses, Nosema apis, Acarapis woodi and Varroa destructor were not detected. Palinologic study of pollen demonstrated that all colonies were foraging on wild vegetation. Consequently, the pesticide residue analysis was negative for neonicotinoids. 

> Many predictive markers and drivers have been suggested for honey bee colony collapsesx. The collapses of honey bee colonies in our study were not related with the presence of neonicotinoids or V. destructor. Instead, N. ceranae seems to be the main culprit of the colony losses in this study as already suggested in previous investigations. ... The results of this study clearly demonstrate that the drivers of colony collapse may differ between different geographic regions.

Cepero, Almudena, et al. "Holistic screening of collapsing honey bee colonies in Spain: a case study." BMC Research Notes 7.1 (2014): 649.

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