Emerald Ash Borer Help for Vermont Ash Trees

Possibly, especially before advanced decline. Candidacy depends on condition, value, targets and treatment feasibility; survival cannot be guaranteed.

Check current Vermont Invasives rules before moving ash material, especially visibly infested wood or imported firewood.

No. Assessment should distinguish healthy, treatable, monitorable and hazardous trees rather than assuming one answer for every ash.

Ash typically has opposite branching and compound leaves, but identification should use several features. Vermont Invasives provides current ash and EAB identification resources.

Treatment is not normally one-and-done. Product, tree size, condition and label requirements determine interval and cost; a credentialed applicator should explain the continuing plan.

Advanced decline can make branches and stems more brittle, reducing normal climbing and rigging options. Early planning preserves more operational choices.

Three features together: leaves arranged opposite each other on the twig rather than alternating, each leaf compound with five to eleven leaflets, and mature bark in a distinct diamond-patterned ridge. Very few Vermont trees combine opposite leaves with compound leaves — the main confusion is with maple, which is opposite but has simple leaves, and with black walnut, which is compound but alternate. If it is opposite and compound and not a maple, it is very likely ash.

It starts in the upper canopy, so the first sign is usually thinning and dieback at the top while the lower tree still looks fine. Then epicormic sprouts appear on the trunk as the tree tries to compensate, then D-shaped exit holes about an eighth of an inch across, then blonding where woodpeckers have flaked bark away chasing larvae. Blonding is often the most visible sign from a distance and is a reliable indicator that the tree is already heavily infested.

Treatment is a genuine option for a healthy, structurally sound ash you value, in a location where losing it would matter, and it works best started before the canopy has thinned much. It is a repeating commitment for the life of the tree, not one application. Removal is the better answer for an ash that has already lost significant canopy, one in poor structural condition, or one whose position means it is a liability rather than an asset. The economics turn on the tree's value to you and how far the infestation has gone.

Because ash becomes brittle far faster than most species after it dies. Within a couple of years the wood loses the toughness a climber depends on, branches snap without warning and the trunk can shatter rather than hinge when cut. Crews frequently refuse to climb a dead ash and use a bucket or crane instead, which costs more. This is the practical reason not to defer the decision: the same tree becomes a more expensive and more dangerous removal every year you wait.

Check the current Vermont guidance before moving anything, and default to not moving it. Firewood and untreated ash material are the main way the insect reaches new areas, and Vermont's guidance around ash material movement is exactly about that. Chipping to a small size, using the wood on the property where it grew, or buying local heat-treated firewood at the destination are the safe options.

Once symptoms are visible, decline is usually a matter of a few years rather than a decade, and it accelerates. The insect has typically been in the tree for a couple of seasons before anything shows from the ground, which is why a tree that "suddenly" looks bad has often been infested for a while. Plan on the assumption that a visibly symptomatic ash is on a short clock.

You need to make a decision rather than take an action. If the tree is one you want to keep and it is in good condition, a preventive treatment programme started now is far more likely to succeed than one started after the canopy thins. If you would not pay to keep it long term, budget for removal on your own schedule, while the wood is still sound and the removal is straightforward, rather than as an emergency in three years.

Yes, and with something other than ash. The lesson of both Dutch elm disease and this outbreak is that a street or yard planted with one species loses everything at once, so diversity is the actual protection. Choose for the site: available root volume, salt exposure if it is near a road, wet or dry soil, and the space the mature crown will need. A tree that fits the site outlives a fashionable one that does not.

The realistic expectation is that untreated ash is lost over time, which is what has happened everywhere the insect has established. That is why municipalities across the region have been inventorying ash, removing declining ones on a planned schedule and replanting with mixed species rather than waiting. For a private owner the same logic applies at a smaller scale: decide, act on your own timetable, and replant with something different.