The evaluation of healthiness of infected mountain pine’s needles was conducted for three years (2011–2013) at few experimental places: Równia pod Śnieżką, Spalona Strażnica, Kocioł Małego Stawu, Kocioł Wielkiego Stawu, Łabski Szczyt and Szrenica. Needles with symptoms of brown spot needle blight were found in subalpine zone of Karkonosze Mts. The field research observations revealed that the greatest severity of symptoms of brown spot needle blight on needles occurred in July. In the first year of the study (2011) disease symptoms were recorded at a level of 5–10% of infected needles at each studied site. In the second year of the study the least number of plants with spotted brown needles (5% of infected needles) was recorded at Równia pod Śnieżką, Kocioł Małego Stawu, Łabski Szczyt and Szrenica while the plants in the region Kocioł Wielkiego Stawu were the most infected, up to 15%. In 2013 situation changed and the highest number of infected plants was at Równia pod Śnieżką (15%).
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