Spruce Bark Beetle Pest Ips Typographus, Spruce Forests Infested Drought, Attacked By the European

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Spruce forests infested drought dry and attacked by the European spruce bark beetle pest Ips typographus, clear cut calamity caused by bark beetle due to global warming and human civilization, non-original planting of spruce stands, dead trees are caused by acid rains, sulfur oxides, nitrogen and ozone, Europe

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