Effects of Forest Type and Climatic Conditions on Pheromone-Trap Catches of Pityogenes chalcographus

Pityogenes chalcographus was monitored using pheromone traps installed in different forest types across Bosnia and Herzegovina. The study was conducted within protected areas of Sarajevo Canton, including the Protected Landscapes of Bijambare and Trebević and the Skakavac Natural Monument. The investigated forest types comprised secondary fir–spruce stands and mixed beech–fir forests with spruce admixture. Data were collected between 2018 and 2021 to assess the effects of forest type and climatic factors on pheromone-trap catches of P. chalcographus. Mean trap catches in secondary fir–spruce forests ranged from 2317.6 to 6317.0 individuals per trap, whereas catches in mixed beech–fir forests with spruce ranged from 150.0 to 6840.0 individuals per trap. The highest mean catches were recorded in the Trebević Protected Landscape and the Skakavac Natural Monument. Overall, trap catches tended to be higher in secondary fir–spruce forests than in mixed beech–fir forests with spruce. Statistically significant differences in mean catches between forest types were detected only in 2021, while no significant differences were observed during 2018–2020. No statistically significant relationships were found between climatic variables and P. chalcographus trap catches during the study period.