From the area of West Pomerania, there are no reports referring to mycological studies connected with tree stands dominated by fir or spruce infested by dangerous root pathogens. The purpose of this introduction was to verify whether fir stands beyond the borders of their natural reach are threatened by Heterobasidion sp. and Armillaria sp. Studies were carried out on three research areas in the survey units: 244 b and 225 kx of the Forest District Oszusznica. From the sampled wood, 10 isolates of Armillaria sp. and 21 isolates of Heterobasidion sp. were obtained. The analysis of results obtained during the presented studies permits to state definitely that the tree stands in 244 b and 244 kx subcompartments show a good state of health). An interesting scientific report is the statement of occurrence, on the area covered by the presented studies, of the species Heterobasidion annosum of S type which has not been reported so far from West Pomerania.

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