EAB Resources



Signs of Emerald Ash Borer (EAB) infestation

  • The leaves in the top third of the ash begin to die back
  • New, thin branches begin to grow from the low trunk or roots
  • There are white lines or canals under the bark
  • The bark on the tree begins to split
  • There are D-shaped exit holes in the bark formed by adult beetles exiting the tree
  • There is increased woodpecker activity on the tree

Identifying an ash tree

How to identify ash trees, infested trees and EAB (pdf)

EAB only attacks true ash trees. In Oakville, green and white ash are the most common ash species, with blue and black ash being rare. Mountain ash and prickly ash have "ash" in their name but are not from the same species and are not susceptible to EAB.

Need more help?

More information about EAB

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Email us at canopyclub@oakville.ca or call ServiceOakville at 905-845-6601.