International Bee Research Association - IBRA November 24, 2016
In recent years extensive losses of honey bee colonies have led to surveys of beekeepers, with much information now coming from Europe and north America. Much less information is available about colony losses elsewhere. Now, in a new paper published in the Journal of Apicultural Research, Agostina Giacobino and colleagues at the Instituto Nacional de Tecnología Agropecuaria, Rafaela, Argentina describe a survey of Argentinian colony losses during the 2013-14 winter.
Varroa mite infestation, colony strength, and winter colony losses were evaluated in 62 apiaries distributed in four different regions in east-central Argentina. Data regarding management practices in each apiary were also collected by means of a questionnaire. The key result was that beekeepers who reported replacing less than 50% of the queens in their apiaries each year showed higher winter losses than apiaries who replaced more than 50% of their queens. Even considering that the winter colony losses can be explained by a complex interaction of factors, requeening appears as one of the most important management practices to reduce this phenomenon in Argentina.
The article is available here (free to view): http://www.tandfonline.com/…/…/10.1080/00218839.2016.1238595
IBRA Members taking the JAR option have access to all other papers in issue 55(4), and also have full access to all articles in the Journal of Apicultural Research back catalogue to Volume 1 in 1962. You can join IBRA here: http://www.ibrabee.org.uk/2013-05-01-02…/2014-12-12-12-06-01