bark wood beetle pest ips typographus infestation, sky blue spruce and bast tree infested attacked by european spruce, wood larva

attacked bark bast beetle blades blue calamity caterpillar caused chop closeup cut cutting cycle dead deforestation detail down electricity environment europe european farm forestry forests hole infestation infested insects ips logging making pest phloem planting pupa salvage scolytinae sky spruce stands stump tree trees turbines typographus way wind wood