The evaluation of infection caused by different fungi species of highbush blueberry plants grown on selected commercial plantations located in central Poland. In the years 2017–2018, research was carried out on the occurrence of fungal diseases on four plantations of highbush blueberry plants located in central Poland. The aim of the research was to isolate and identify pathogens from diseased parts of plants of highbush blueberry. Four fungi species were identified based on traditional methods with mycological keys – visible symptoms were present on infected parts of the plants and the morphology structure. On all of the tested plantations, symptoms of Botrytis cinerea, Godronia cassandrae and Phomopsis vaccinii were observed. The Valdensia heterodoxa like symptoms were observed too, but only once. The second part of the research was an evaluation of the effectiveness of seven fungicides in control of grey mould disease of highbush blueberry. The research was conducted using both pesticides commonly recommended for the protection of highbush blueberry plantations against grey mould disease as well as fungicides permitted for use on other berry plants (strawberry and raspberry). The fungicides Luna Experience 400 SC and Prolectus 50 WG can be considered as an addition to the list of pesticides recommended for the control of grey mould disease.