Norway spruse (Picea abies L. ) forests occupy more than 500,000 ha, which is approximately 50% of forest covered area in mountain zone of Ukrainian Carpathians. Therefore bark beetles problem is very much actual in this region. Among the bark beetles, Ips typographus L. is the most important pest on spruse. Now its population grows intensively due to repeated windthrowns and considerable area of root rot infestations (caused by Heterobasidion annosum Fr. Bref. and Armillarieiia mellea Fr. ex. Vahl Karst).
One of the causes of bark beetles development in Carpathians is the balance disturbance of spruce stands spatial and age structure. Since middle age, the monocultures as a rule are characterized by decreased resistance to harmful abiotic and biotic agents. In some forest enterprises up to 60-80% of spruce monocultures are the foci of drying.
The program included
the selection of stands in the two monitoring points for pheromone traps installation,
Ips typographus population counts in pheromone traps,
bark beetles analysis of felled trap trees.