The aim of the work was to examine the health status of 11 highbush blueberry (Vaccinium corymbosum L.) cultivars cropped on the plantations in a south-eastern region of Poland as well as to determine the composition of fungus species colonizing their stems. The performed observations of health status indicated that stems with disease symptoms were found on almost all bushes. Three types of symptoms were found: spots on stems, from which mainly Topospora myrtilli was isolated, widespread stem necrosis inhabited by Phomopsis archeri and necrosis of stem tops caused by Botrytis cinerea. Moreover, the following isolates of fungi were obtained Cytospora, Phoma, Fusarium, Alternaria and Seimatosporium vaccinii, Myxothyrium leptideum and Sordaria fimicola. It was confirmed that the most malignant pathogen of highbush blueberry in the studied region was Topospora myrtilli.

37-50