The occurrence of pine needle rust (Coleosporium tussilaginis) on mountain pine (Pinus mugo) in selected regions of Karkonosze National Park

Summary The evaluation of healthiness of infected mountain pine’s needles was conducted for two years (2013–2014) at few experimental places: Kopa, Śląskie Kamienie, Kociol Smogorni, Sokolnik, Łabski Szczyt, Szrenica, Kociol Malego Stawu and Kociol Wielkiego Stawu. Needles with symptoms of pine needle rust were found in subalpine zone of Karkonosze Mts. In both years of study disease symptoms were recorded at a level of 5–10% of evaluated plants growing at Kopa, Łabski Szczyt, Szrenica, Kociol Malego Stawu and Kociol Wielkiego Stawu. The most infected needles, up to 10% occurred in the region of Kociol Malego Stawu. On the other hand the highest value of disease index was recorded on Kopa and in Kociol Malego Stawu.