Emerald Ash Borer in Franklin County: What Landowners Need to Know
Emerald ash borer is established in Massachusetts, and it has been moving through Franklin County’s ash. If you have ash on your property, this will affect you eventually. The practical question is not whether the tree dies, it is whether you deal with it while it is still safe to work on.
What EAB does
EAB is a small metallic-green beetle whose larvae feed in the layer just under the bark, cutting the tree’s ability to move water and nutrients. Infestation is effectively a death sentence for an untreated ash. Trees typically decline over roughly two to four years once symptoms show, though they were usually infested for a year or two before anyone noticed.
Signs to look for
- Canopy dieback starting at the top and working down, usually the first thing anyone notices
- Epicormic sprouts, shoots erupting from the trunk and base as the tree tries to compensate
- D-shaped exit holes about an eighth of an inch across, distinctively flat on one side
- Serpentine galleries under the bark, winding S-shaped tunnels
- Heavy woodpecker activity and pale patches where birds have flaked off outer bark to get at larvae, often visible from a distance and one of the earliest reliable signs
- Bark splitting vertically over old galleries
Why dead ash is a specific hazard
This is the part worth taking seriously. Ash killed by EAB becomes brittle unusually fast compared with other hardwoods. Within a couple of years of death, limbs snap off unpredictably and the wood can fail without warning under a climber’s weight or under rigging load.
- A dead ash near a house, driveway, road, or anywhere people walk is a higher priority than most other dead trees
- Removal gets more expensive the longer you wait, because at some point it can no longer be climbed and needs a bucket truck or crane
- Do not attempt to fell a dead ash yourself. The failure modes are genuinely different from a healthy tree, and this is where people get hurt.
Treatment or removal?
Treatment with systemic insecticide can protect an individual ash, but it has to be repeated on a cycle indefinitely, and it is only worth considering for a healthy, high-value tree caught early. Once a tree has lost a meaningful share of its canopy, treatment will not bring it back.
For most landowners with ash scattered through woods or along a field edge, the realistic plan is: remove the ones that threaten something, and let the rest go where they stand harmlessly.
What to do now
- Identify whether you have ash at all: compound leaves, opposite branching, diamond-patterned bark on mature trees
- Look at where they are. Ash in the middle of the woods is not urgent. Ash over your driveway is.
- Check the canopy each spring. Thinning tops and woodpecker flaking are your early warning.
- Deal with the ones near targets while they are still standing sound, not after they are brittle.
Get an assessment
Call (413) 522-2117 or book a tree health and hazard assessment. We will tell you which of your ash actually need to come down and which can be left alone.