Progress of spreading Stereum sanguinolentum (Alb. et Schw.: Fr.) Fr. wound rot and its impact on the stability of spruce stands

Abstract

In 2002-2003, we conducted a detailed inventory of bark stripping damage in Forest District (FD) Mořkov (Forest Enterprise Frýdek-Místek) and in Forest Range (FR) Proklest (Training Forest Enterprise Křtiny). In total, 3,988 trees were examined in FD Mořkov and 1,512 trees in FR Proklest; in detail, 52 and 38 sample trees in FD Mořkov and FR Proklest, respectively. The rot spread in stems in the Proklest RD by an average rate of 15.6 cm/year, in FD Mořkov by an average rate of 23.8 cm/year. The rate of the rot spread decreases with the increasing period of parasitizing. The stem length affected by the rot ranged most frequently between 2.5 and 4.5 m (Proklest) or 2 and 3 m (Mořkov). The rot damaged on average 38.8 and 42.4% of the sample tree volume in RD Proklest and FD Mořkov, respectively. The proportion of trees affected by the rot decreased with the stand age. The observed extent of wound rot significantly decreases mechanical stability of stands and their adaptation potential.

Keywords

• stereum sanguinolentum
• bark stripping
• stand stability
• norway spruce