If your ash tree’s canopy is thinning, bark is flaking off in patches, or woodpeckers are suddenly interested in your trunk, ...

On ash trees, the buds, leaves, and sometimes twigs may become infected. In early spring, infection of buds or expanding leaves results in irregular brown blotches and distortion of leaflets.

The emerald ash borer eats into the bark of ash trees and leaves D-shaped ... Department of Agriculture explains the distinctive leaf pattern of of an ash tree, which can help with identification.

DNA sequencing shows young trees are more likely to have gene variants that confer partial resistance to a fungus that has ...

Ash trees are fighting back against a disease that has ravaged the British countryside, new scientific evidence shows. When ...

The emerald ash borer, an invasive pest that kills ash trees, has been detected in 13 Vermont counties and is still spreading. But towns often don’t have the budget, or the guidance, to address it.