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Selekční kritéria k upevnění varroatolerance včely medonosné
 Rod, Jan
Main purpose of this thesis is to summarize knowledge in the field of suppressing the varroosis and to compare contemporary methods and chemicals. Then to describe behavioural patterns of varroatolerant bees, their mutual relations and their importance for selection of varroatolerant honey-bee colonies. In the thesis is described relation between varroosis and the viruses of honey bee and a possible consequences of this relation for the honey bee population. Theoretical knowledge is supported by the experiments with the new methods of application of oxalic acid. The object of these experiments was to determine the efficiency of oxalic acid in control of the growth of the Varroa mite and it’s effect on the brood. Then the varroasensitive hygiene of honey bee colonies was tested. The results show that methods for selecting varroatolerant honey bee colonies is still not finished for praxis, therefore, collapses have to be prevented by application of varroacids.
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