A late summer swarming caused a widespread spruce bark beetle outbreak and Södra now sees a significant increase in damage. An inventory in late October shows a 25-percent increase in the volume of damaged forest compared with the inventory in late August.   According to Södra, removing as many infested trees as possible before the spring swarming starts is now critical.  The most recent damage inventory of  dam's 330 surveillance estates in late October shows that more than 1.4 million m³  of spruce forest on members' estates is spruce bark beetle-infested ...