Ranking of silvicultural areas by the threat of annosum root rot in pine stands

The paper presents a ranking of forest sites according to the threat ofinfection of planting Pinus sylvestrisstands by Heterobasidion annosum.8 degrees of treat of infection are marked out according to the site characteristics and types of habitat and moisture conditions. Presented gradation underlined planning of forest stands with susceptible species, that would allow to make for creation of more stable stands, reduction of infection and decrease costs of protection measures.