What it is
A metallic green beetle from Asia whose larvae feed under the bark of ash trees. It has killed millions of ash trees across the country.
Identify your ash
Ash trees have leaves made of several leaflets, opposite branching and bark with diamond-shaped ridges on mature trees. An arborist can confirm.
Signs of infestation
Thinning crown from the top, bark splitting, small D-shaped exit holes, sprouts from the trunk and woodpecker damage are common signs.
Treatment
Systemic insecticides can protect healthy ash trees if started early and repeated. Trees with heavy canopy loss usually cannot be saved.
Removal
Dead ash trees become brittle quickly and are dangerous to climb or cut. If a tree cannot be saved, remove it while the wood is sound.
Replacement
Plant a variety of native species, not another monoculture. We can suggest trees that suit your site.
Decide early: treat the healthy ash trees and remove the failing ones before they become dangerous.
