Emerald Ash Borer

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Emerald Ash Borer

Agrilus planipennis

This insect was first detected in North America in 2002, it is assumed that it arrived on this continent at least ten years earlier. It attacks both stressed and healthy Ash trees. The EAB is native to Asia, this beetle has proven to be highly destructive. Since its arrival, it has killed tens of millions of ash trees and continues to spread into new areas, with considerable ecological and economic impacts.

Canadian Forest Service scientists estimate that costs for treatment, removal and replacement of emerald-ash-borer-Identification trees affected by emerald ash borer around Canada may reach $2 billion over a 3-decade period.

In Canada, the emerald ash borer does not have many effective natural predators, and native Ashe trees have limited resistance to the beetleā€™s attack. Surveys have shown that the emerald ash borer damages and kills trees in stands within 1 to 4 years of infestation.

Regularly, within 6 years of an EAB infestation arriving in a wooded area, more than 99% of the ash trees will be killed. The Emerald Ash Borer has been active in rural areas like Caledon, Milton, Halton Hills, Vaughan and Burlington, and also very active in the more populated cities like Toronto, Mississauga, Brampton and Oakville.


  • Leaves deteriorating and branches dieback with visible infestation emerald-ash-borer-Treatments
  • S-shaped patterns. The EAB larvae creates this pattern as they feed under the bark of a tree. The outer layer bark has to be removed so the galleries are visible.
  • D-shaped exit holes. These 1/8 of an inch wholes are signs of an emerald ash borer infestation.
  • Visible Woodpecker flecking. Woodpeckers searching for EAB larvae

Solutions and Treatment

If you suspect that you might have the Emerald Ash Borer, contact a certified arborist or certified pesticide applicator as soon as possible. Get professional advice before resorting to any specific treatment option.

Your first line of defense is an Emerald Ash Borer insecticide treatment. Most arborist offer this service, if the infestation is in the earlier phase.

If the infestation has been present for sometime, the only course of action is that an certified arborist removes the whole tree and grinds the stump, prior to the infestation moving to healthy neighboring trees.

If you suspect that your trees might have the Emerald Ash Borer, contact us as soon as possible for a free no-commitment consultation, The Real Tree Masters Inc. Tree Service at (416) 272-3534.

We at The Real Tree Masters Inc. will be posting a new article to assist you with What Do Arborists & Tree Service Compaines Do?. Please stay tuned.



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