DISPOSITION FOR BARK BEETLE INFESTATION O F SPRUCE STANDS WITH NEW-TYPE FOREST DAMAGE SYMPTOMS IN THE THURINGIAN FOREST (COLEOPTERA, SCOLYTIDAE)

Older spruce stands of the Oberhof Forestry District in the Thuringian Forest where conspicuous symptoms of a ''new-type forest damage'' occ ur since the beginning of the 80s, have been investigated for their di sposition to bark beetle attack. Out of 300 sample trees, 49% were inf ested by the Large spruce bark-beetle, Ips typographus Linnaeus 1758; 36% of these infested ones died. A significant correlation between bar k beetle infestation and symptoms of the ''new-type forest damage'' co uld not be evidenced by statistical measures. A tendency towards a gre ater disposition of these trees to infestation is obvious however.