K. Gurgulova1, I. Zhelyazkova2*, S. Takova1, K. Malinova3

1National Diagnostic and Research Veterinary Medical Institute, 1000 Sofia, Bulgaria
2Department of Animal Science, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria
3Department of Ecology and Landscape Architecture, Faculty of Agriculture, Forestry University, 10 Kliment Ohridsky, 1756 Sofia, Bulgaria

Abstract. In European (Western) honey bee Apis mellifera L. Varroa mites must be continuously monitored to allow colonies to develop normally and realize high productivity and quality of bee products. A clinical trial of veterinary-medical product, based on amitraz, in the form of strips (VMP Apivar ® – 3.33% amitraz) was carried out in the autumn of 2011. High efficiency of the active substance against Varroa destructor in apiaries on the territory of Bulgaria is determined. After exposure of 46 to 78 days high efficiency on varroosis (Varroa destructor) is achieved – average in four apiaries from 99.00% to 99.86%.