EN
The aim of investigation was to assess the infection degree of Sorbus aucuparia L. infected by Gymnosporangium spp. at Karkonosze National Park. The experiment was conducted in 2007, 2008 and 2009 from June to September. The results of investigation showed, the presence of leaf infection of Sorbus with Gymnosporangium confusum only in case of plants growing on southeast side of Cirque of the Small Pond.