Felling date affects the occurrence of Pityogenes chalcographus on Scots pine logging residues.

摘要

Logging residues form a substantial portion of the dead wood in managed forests, and logging residues can facilitate bark beetle multiplication and outbreaks. For these reasons, it is highly advisable to find a way of reducing the risk of bark beetle outbreaks without extensive removal of logging residues, which is inconsistent with nature conservation. The coverage of Pityogenes chalcographus (L.) galleries and the presence of other bark beetle species on 3520 fragments of logging residues of the Scots pine (Pinus sylvestris L.) that originated over different months from 2004 to 2008 were examined in 135 stands in four study areas of the Czech Republic. Pityogenes chalcographus was the most abundant species. The month of felling had a significant effect on the coverage of P. chalcographus galleries on logging residues. Concentrating felling in August and September (and possibly October) can minimize the risk of P. chalcographus multiplication and outbreaks.