Interactions between honeybees and varroa mites influenced by cell sizes and hygienic behaviour. (English)

Differences in cell sizes used in beekeeping are often proposed to be one of the factors regulating Varroa population growth. An in-depth research of the relationship between these factors was undertaken using the 'Carnica Singer population'. The acceptance of foundation with a specific cell size appears to underlay selection. Smaller cell size (4.9 mm) foundation/ combs reduce the Varroa population growth compared to 5.5 mm. This reduction is also dependent on the presence of the VSH (= Varroa sensitive hygienic) - behaviour trait in the worker bee population within the colony. Smaller cell size combs in combination with breeding for the 'right genetics' (cell size and VSH) can be one part of an integrated sustainable treatment concept for Varroa control. [ABSTRACT FROM AUTHOR]

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