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.

In heavily affected areas, up to 30% of beech trees are killed within seven years of contracting beech leaf disease.

PORTLAND, Maine — Experts are now in preventative mode as the emerald ash borer, or EAB, expands its damage across Maine.

An invasive beetle that kills ash trees has made it to the Nashville area. As a result, up to 13% of Tennessee's trees could ...

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

Natural selection is acting upon thousands of locations within the ash tree DNA, driving the evolution of resistance as the ...

The emerald ash borer eats into the bark of ash trees and leaves D-shaped holes. Debbie Miller / U.S. Forest Service. Matt Mills, an emerald ash borer support specialist with the Oregon Department ...

Darling-58 sprouts, a transgenic American chestnut created by ESF researchers, grow in a nutrient solution. Darling 54, a ...

Over the years, it's been spotted in Northern Colorado. Described as a "green menace" the emerald ash borer has killed ...

The damage is invisible at first, but it doesn’t take long for the leaves to wither, the trunks to weaken, the once-vibrant ...

Light. Mountain ash grows well in full sun or part shade.Too much shade, however, will limit its flower and fruit production. For best flowering, give it at least 6 hours of sun per day.