Add Yahoo as a preferred source to see more of our stories on Google. “What is wrong with my birch tree? I am seeing some odd-looking patches on the leaves.” — Deb Schultz, Evanston The pinkish-red ...

Finnish researchers are investigating unexplained leaf loss affecting birch trees across southern Finland. Scientists suspect ...

Brown birch trees in both Southcentral and Interior Alaska this summer aren’t signaling an early fall. Rather, they are subject to an infestation of small, leaf-munching larvae. Alaska is in the midst ...