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Emerald ash borer

The emerald ash borer is an exotic insect with no natural predators in our latitudes. It is well established across the CDN–NDG borough and has already caused considerable damage.

Is there an ash tree on your property?

Collaboration from residents is essential in order to effectively combat this destructive pest. If you own an ash tree, please consult an arboriculture professional without delay to determine whether your tree is infested, and take the appropriate action.To select a professional, please consult the website of the Société internationale d’arboriculture Québec at SIAQ.org.

  • If your ash tree shows no signs of decline, we recommend that you have it treated against the emerald ash borer.
  • If it does present signs of decline, a professional will be able to check if the ash borer is the cause and if the decline observed is irreversible. If such is the case, the tree will have to be cut down.

For further information: ville.montreal.qc.ca/agrile

Ash trees in the public domain

The CDN—NDG Borough has invested hundreds of thousands of dollars in the fight against the emearld ash borer, in conjunction with efforts by the Ville de Montréal’s Direction des grands parcs et du verdissement (Large parks and greening department). The borough has carried out preventive treatment on a number of trees in the public domain by injecting a biopesticide meant to curb the emerald ash borer population and limit its spread.

The objective of this operation is to preserve our healthy ash trees for as long as possible, as they make up a significant proportion of our green canopy.

The borough’s efforts to combat this pest also include cutting down ash trees that are in a state of irreversible damage. In order to limit the inconveniences caused by this operation, the Borough will prioritize the planting of trees in places where ash trees have been cut down.