bark wood beetle pest ips typographus infestation, spruce bast tree infested attacked, spruce stump and newly new planted planting

attacked bark bast beetle branches calamity caused chop conifer cut cutting cycle dead deforestation down ecological environment europe european forests growing hole infestation infested insects interactions ips logging making new newly opening part pest phloem planted planting pupa salvage scolytinae seedling small spruce stands stump tree trees typographus way wood