Beech leaf disease is believed to be caused by a particular type of nematode, which is a microscopic, threadlike worm. It was first discovered in Ohio in 2012.

A CBS News map shows where leaf colors are changing and where to see peak fall foliage, updated regularly.

The young beech trees on her land are beginning to lose some or all their leaves. And ones that haven’t been defoliated have few leaves with some of them looking brown or crinkled. There’s a lot more ...

Leaf-peeping season is almost here as the searing heat of summer comes to a close. Fall foliage outlooks say peak fall colors will start appearing in the northeast United States by early October ...

Science Friday is leading a community science effort to help researchers understand the spread and severity of Beech leaf disease (BLD)—and you can help. Read our reporting, join our community, and ...