Varroa-virus interaction in collapsing honey bee colonies.

Varroa mites and viruses are the currently the high-profile suspects in collapsing bee colonies. Therefore, seasonal variation in varroa load and viruses (Acute-Kashmir-Israeli complex (AKI) and Deformed Wing Virus (DWV)) were monitored in a year-long study. We investigated the viral titres in honey...

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Autores principales:	Roy M Francis, Steen L Nielsen, Per Kryger
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b09dd478aa9840edb3fc6681d38b5092
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spelling	oai:doaj.org-article:b09dd478aa9840edb3fc6681d38b50922021-11-18T07:53:00ZVarroa-virus interaction in collapsing honey bee colonies.1932-620310.1371/journal.pone.0057540https://doaj.org/article/b09dd478aa9840edb3fc6681d38b50922013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23526946/?tool=EBIhttps://doaj.org/toc/1932-6203Varroa mites and viruses are the currently the high-profile suspects in collapsing bee colonies. Therefore, seasonal variation in varroa load and viruses (Acute-Kashmir-Israeli complex (AKI) and Deformed Wing Virus (DWV)) were monitored in a year-long study. We investigated the viral titres in honey bees and varroa mites from 23 colonies (15 apiaries) under three treatment conditions: Organic acids (11 colonies), pyrethroid (9 colonies) and untreated (3 colonies). Approximately 200 bees were sampled every month from April 2011 to October 2011, and April 2012. The 200 bees were split to 10 subsamples of 20 bees and analysed separately, which allows us to determine the prevalence of virus-infected bees. The treatment efficacy was often low for both treatments. In colonies where varroa treatment reduced the mite load, colonies overwintered successfully, allowing the mites and viruses to be carried over with the bees into the next season. In general, AKI and DWV titres did not show any notable response to the treatment and steadily increased over the season from April to October. In the untreated control group, titres increased most dramatically. Viral copies were correlated to number of varroa mites. Most colonies that collapsed over the winter had significantly higher AKI and DWV titres in October compared to survivors. Only treated colonies survived the winter. We discuss our results in relation to the varroa-virus model developed by Stephen Martin.Roy M FrancisSteen L NielsenPer KrygerPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 3, p e57540 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Roy M Francis Steen L Nielsen Per Kryger Varroa-virus interaction in collapsing honey bee colonies.
description	Varroa mites and viruses are the currently the high-profile suspects in collapsing bee colonies. Therefore, seasonal variation in varroa load and viruses (Acute-Kashmir-Israeli complex (AKI) and Deformed Wing Virus (DWV)) were monitored in a year-long study. We investigated the viral titres in honey bees and varroa mites from 23 colonies (15 apiaries) under three treatment conditions: Organic acids (11 colonies), pyrethroid (9 colonies) and untreated (3 colonies). Approximately 200 bees were sampled every month from April 2011 to October 2011, and April 2012. The 200 bees were split to 10 subsamples of 20 bees and analysed separately, which allows us to determine the prevalence of virus-infected bees. The treatment efficacy was often low for both treatments. In colonies where varroa treatment reduced the mite load, colonies overwintered successfully, allowing the mites and viruses to be carried over with the bees into the next season. In general, AKI and DWV titres did not show any notable response to the treatment and steadily increased over the season from April to October. In the untreated control group, titres increased most dramatically. Viral copies were correlated to number of varroa mites. Most colonies that collapsed over the winter had significantly higher AKI and DWV titres in October compared to survivors. Only treated colonies survived the winter. We discuss our results in relation to the varroa-virus model developed by Stephen Martin.
format	article
author	Roy M Francis Steen L Nielsen Per Kryger
author_facet	Roy M Francis Steen L Nielsen Per Kryger
author_sort	Roy M Francis
title	Varroa-virus interaction in collapsing honey bee colonies.
title_short	Varroa-virus interaction in collapsing honey bee colonies.
title_full	Varroa-virus interaction in collapsing honey bee colonies.
title_fullStr	Varroa-virus interaction in collapsing honey bee colonies.
title_full_unstemmed	Varroa-virus interaction in collapsing honey bee colonies.
title_sort	varroa-virus interaction in collapsing honey bee colonies.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/b09dd478aa9840edb3fc6681d38b5092
work_keys_str_mv	AT roymfrancis varroavirusinteractionincollapsinghoneybeecolonies AT steenlnielsen varroavirusinteractionincollapsinghoneybeecolonies AT perkryger varroavirusinteractionincollapsinghoneybeecolonies
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Varroa-virus interaction in collapsing honey bee colonies.

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