Adult spruce bark beetles in their galleries in the bark of a Norway spruce tree. The beetle in the middle is infected with the fungus Beauveria bassiana. Spruce bark is rich in phenolic compounds ...
BILLINGS -- These are good days if you're a tree-killing bark beetle. In 2007, the native pests ate deeper into the region's drought-weakened forests, choking the life out millions of trees in one of ...
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