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Dead Trees

Emerald ash borer in Erie County: what to do about ash trees

Emerald ash borer has wiped out a large share of the ash trees across Pennsylvania. If you have an ash in your yard, it's worth knowing where it stands.

  • Tree Service Erie PA crew
  • Sep 19, 2026
  • 5 min read
Climber removing a dead tree beside a fence

The emerald ash borer is a small invasive beetle whose larvae tunnel under the bark of ash trees and cut off the flow of water and nutrients. Infested trees usually decline over a few years and die.

The problem for homeowners isn't only losing the tree. Dead ash wood becomes brittle and dangerous faster than many other species.

Is it an ash?

  • Branches and buds grow in opposite pairs.
  • Compound leaves with 5 to 9 leaflets.
  • Diamond-patterned bark on mature trees.

Signs of emerald ash borer

  1. Thinning and dieback starting at the top of the crown.
  2. D-shaped exit holes in the bark, about 1/8 inch across.
  3. Heavy woodpecker activity and bark flecking.
  4. Vertical splits in the bark.
  5. Shoots sprouting from the trunk or base.
Tall trunk with limbs removed in a backyard
Dead ash should come down while it's still safe to climb.

Your options

Tree conditionUsual option
Healthy, high-valueAsk about preventive treatment
Some diebackAssess; treatment may not be worth it
Mostly or fully deadRemove
Dead ash gets worse fast

As dead ash dries out, limbs drop without warning and the tree can become unsafe to climb.

What to plant instead

Choose a diverse mix of species so one pest can't wipe out your yard again. Native oaks, maples and other well-suited trees are good options; a local nursery can help match the site.

Need it fixed?

Dead & Hazardous Tree Removal across Erie County

A local Erie crew for removals, trimming, stumps and storm work, with phones answered around the clock.

Frequently asked questions

Can emerald ash borer spread to my other trees?

It attacks ash species. Other trees aren't affected by this beetle.

Can I burn or move ash firewood?

Moving firewood can spread invasive pests. Burn it locally and follow any state guidance on firewood movement.

Are treatments worth it?

For a healthy, valuable ash in a good location, sometimes. For a tree already in decline, usually not.

How do I know if my tree is safe?

Have it looked at. Signs like dead limbs, bark falling off and woodpecker damage mean it should be assessed.

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