Abstract
The results of long-term monitoring of beech bark necrotic damage in a mature stands in Czech Re - public, Slovakia, Poland, Hungary, Romania, Serbia and Bulgaria are presented in paper. Overall, 10,863 beech trees were evaluated at 121 localities. The majority of trees (6,679) were evaluated at 55 localities in Slovakia and the re - maining 2,684 trees at 50 localities in Bulgaria. In each country, we noted a wide interval of the values of beech stem necrotization index (I SN ) - e.g. in Bulgaria from 0.22 to 1.50 and in Slovakia from 0.53 to 1.97. The average value of I SN in Slovakia (1.22) was higher than the value in all other countries except for the Czech Republic (1.35). Overall, in Bulgaria, we found a more favourable state of beech bark necrotic damage than in Slovakia. As much as 80% of the Bulgarian localities had I SN values 1.5, whilst there was no Bulgarian locality recorded in this interval. We consider Slovakia and Bulgaria as the countries where the issue of beech bark necrotic damage is relatively well established.
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