The black pine health condition in the Zoborské vrchy Mts.
The introduced black pine (Pinus nigra Arnold) has been planted for its resistance to pollution and biotic harmful factors. However, nowadays the species appears drying up. The object of this paper is to assess the measure of damage, to identify the reason for its injury and to estimate the measure of the influence of the black pine stands in the Zoborské vrchy Mts in the years 2007 and 2008. An occurrence of the Rhyacionia buoliana (Denis & Schiffermüler), was identified on a tree shoot. On each spot, there have been assessed the degree of damage to the trees by all relevant harmful factors and intensity of infestation by the Rhyacionia buoliana. It has been found out, that the spots have different degree of damage by all harmful factors, as well as the intensity of infestation by the Rhyacionia buoliana.