Rocky Mountain National Park announced April 3 that lab tests conducted by the U.S. Geological Survey confirmed that a fungus ...

but "most entomologists who worked on aspen had never heard of them," he says. His crew now finds bark beetles in almost every damaged stand. They've also observed that some fungi, borers and ...

Populus tremuloides, the quaking aspen of the North American continent, stands as one of the most easily recognized, most beautiful and most admired of all tree species. In order to help ...