Acta Scientiarum Polonorum
Silvarum Colendarum Ratio et Industria Lignaria

Abstract In the Złotów Forest District 5 pine stands were selected and in each of which 4 observation plots were established each, consisting of 50 trees growing in clusters. The study consisted in one count of dead trees per year conducted in observation plots and in the whole experimental area. Results of the 3-year study showed the applied test tree method is not suitable in the assessment of threat to age class I pine stands posed by Armillaria fungi.