A third consecutive year of bark beetle calamity is expected to destroy the European spruce forests. The warm winter of 2019-2020 has aggravated the situation, and the coronavirus pandemic has limited interventions in the forests, and has also blocked domestic and export markets.   In the Vosges forests of France, the alert came early, in a press release dated April 16 from the Vosges Chamber of Agriculture: "We had already mentioned sporadic bark beetles signs of infestation in March, but the cold week of April 1 tempered the expansion. In the early hours of Monday April ...