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A complete loss or decrease of varroacid efficacy of Apistan (tau-fluvalinate) has been stated in some Mediterranean and Austrian regions. The results of studies on this problem presented at the 34-th International Congress of Apimondia in Lausanne - 1995 poited to the development of Varroa jacobsoni mites resistant to Tau-fluvalinate and other acaracid pyrethroids. Since tau-fluvalinate has been...
The objective of the work was to determine the effect of invasion of Varroa jacobsoni on the bee colonies of different breeds in the fourth year of varrosis. It was found out that bee colonies which were not treated died in the fourth year of the disease, while treated ones were debilitated. The main loss concerned the bee colonies with augustonian and carnica queens. The most resistant were colonies...
In consequence of occuring and expansion of Varroa Jacobsoni mite new problem has been arised to ensure of effective honey bee protection. In this paper, research-developmental works, realised in 1984-1991, to solve that problem have been presented. Through RD works production of I generation varroacidal formulations (Warosekt and Apiwarol AS) have been started and up-to-date formulations are being...
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