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Examination of Varroa infestation is important for the diagnosis and evaluation of the efficacy of methods and substances used for the control of varroasis. The aim of the study was to estimate the accuracy of the method of examining samples of adult bees to determine the Varroa rate of infestation in the colony. The experiment was carried out on 10 bee colonies. From each of them 7-8 samples of 200-300...
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...
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