emerald ash borer


Does the emerald ash borer infect young ash trees? I have an ash which is 2″ in diameter and about 18′ tall and am hoping that if the ash borer only infects mature trees then perhaps by the time my tree matures the problem may be solved and I will be able to keep my tree. At that point my tree will probably be one of the few remaining ash trees in Toronto. If the chances are too slim and I’m being too optimistic, I may be better off to remove it now before I incur huge costs in removing a mature tree. Please advise.



Thank you for your inquiry.  Emerald ash borer ( EAB) can affect all ash trees regardless of age or size.   There is a treatment available but it is not without cost and it would be your responsibility.  Rather than provide all the details ,the city of Toronto has published guidelines with respect to EAB and what steps can be taken.  I have attached the link to this document.   http://www.toronto.ca/trees/pdfs/EABPresentation.pdf

The signs and symptons of EAB are:

Tree decline, including:

  • yellowing of the foliage
  • thinning crown
  • evidence of adult beetle feeding on leaves
  • long shoots growing from the trunk or roots
  • vertical cracks in the trunk
  • deformed bark (3-4 mm)
  • small D-shaped emergence holes
  • S-shaped larval tunnels under the bark filled with fine sawdust
  • presence of woodpeckers in winter and woodpecker holes

source: http://tidcf.nrcan.gc.ca/insects/factsheet/1000101

While the EAB can fly up to several kilometres, another significant factor contributing to its spread is the movement of firewood, nursery stock, trees, logs, lumber, wood with bark attached and wood or bark chips. There are regulations in place regarding the movement of these items.  If you decide to remove your tree you must take precautions as to the disposal of the tree.

I hope this information helps and that you can now make an informed decision as to what to do with your ash tree.