Pennsylvania naturalists are keeping an eye on a disease that has been killing beech trees in the eastern U.S. for more than a decade, but has begun spreading more rapidly in the past three years.

Local landowners are encouraged to check their beech trees for signs of invasive beech leaf disease after the disease was found in St. Clair County earlier this year. The disease causes characteristic ...

Following its addition to Michigan's invasive species watch list last year, beech leaf disease has been found in an area of St. Clair County, according to the Michigan departments of Natural Resources ...