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Symptoms of Emerald Ash Borer

Here are some signs that a tree may be infested with EAB. Since these symptoms also can be due to other problems, contact a certified professional arborist to make sure.

  • The tree canopy thins or dies back as nutrients and water can’t reach the top.
  • “Suckers” or new young branches sprout from the tree’s trunk, lower branches, or base.
  • Woodpeckers make holes in the bark or branches as they look for an EAB lunch.

By the time you see substantial damage, it may already be impossible to save an ash tree. If EAB larvae have destroyed too many of a tree’s water-conducting channels, there is no way for the water-and-insecticide solution to flow throughout the tree and reach the insects.

Learn more at the Plant Advice page of the Arboretum's website.