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.

In a Holden Arboretum greenhouse lined with rows of potted trees, researcher David Burke points to dark banding patterns on one leaf – a sign of a relatively new disease that is afflicting area beech ...

Beech leaf disease is out there once again, decimating beech trees in Massachusetts, as it has in the past. It's a relatively new tree disease, which first appeared in 2012 in Ohio, and has since ...

Brianna Shepherd, research specialist at Holden Forests & Gardens, measures the diameter of an American beech tree as part of a long-term study on the impacts of beech leaf disease. First observed in ...

Over the years Ohio trees have had a continuing list of problems. Oak wilt is currently affecting oak trees. Before that, there was the Emerald Ash Bore for ash trees and earlier there was Dutch Elm ...

IT’S LEAVING A GIANT PROBLEM IN ITS WAKE. BEECH TREES CAN BE FOUND ALL ACROSS BALTIMORE AND THE STATE, BUT THERE’S SOMETHING OUT THERE MAKING THEM SICK. AND YOU CAN TELL BY THE LEAVES. A BIG PROBLEM ...

One of my favorite trees is the iconic American Beech (Fagus grandifolia). I love its smooth, light bluish gray bark — the silvery green leaf in spring that gradually changes to a dark green in summer ...

A scanning electron microscope reveals nematodes (highlighted in green) inside the spongy mesophyll of a European beech (Fagus sylvatica) leaf infected with beech leaf disease (BLD). Eggs are marked ...

Two of my favorite spring plants, almost entirely based upon their progression from bud to leaf, are beech trees and false hellebore (a common wetland plant). I was thinking about why they are so ...

Near the bottom of a shady hillside in Jericho, a lone beech tree stretches high into the canopy, a relic of a bygone forest. Through luck or (hopefully) genetics, this mighty tree has avoided ...