Fight against the emerald ash borer
Identifying ash trees
- Compound leaves consist of an odd number of leaflets, between 5 and 9.
- Young ash trees have smooth reddish bark.
- Mature ash trees have a bark consisting of a regular pattern of furrows.
Inspecting ash trees
- The insect, usually a metallic emerald green colour, is 8 to 15 millimetres long.
- The borer can be seen on the crown of trees, especially on leaves exposed to the sun, from mid-May to late July.
- The larvae live in the bark of ash trees. It bores S-shaped tunnels.
Signs of infestation
- D-shaped holes in the bark.
- S-shaped tunnels under the bark.
- Yellowing leaves, branch die-off and opening of the crown.
- Suckers sprouting from the trunk.
- Presence of woodpecker holes
In September 2015, City Council adopted the first strategy to battle emerald ash borers, preserve the urban forest, maintain the canopy and protect biodiversity.
Objectives of the strategy:
- Slow ash mortality;
- Reduce the costs generated by loss of ash trees;
- Ensure everyone’s safety;
- Maintain the canopy;
- Protect biodiversity.
For the complete By-law on emerald ash borers, go to the By-laws page.
In August 2015, 4,000 ash trees were inventoried on public land, divided into three categories.
|Category||Number of ash trees|
|Ash trees treated in even-numbered years||800 (20%)
2014: 500 ash trees treated
2016: 300 more ash trees will be treated
|Ash trees treated in odd-numbered years||600 (15%)
2015: 600 ash trees treated
|Ash trees not treated||2,600 (65%)|
The treatment strategy on public land covers ash trees located in parks and alongside streets.
Treatment with TreeAzin preserves the ash trees while new trees are planted or another protective measure is found. The strategy is revised and adapted based on new knowledge and treatments.
Some 325 ash trees will be felled each year until 2021. Felling of untreatable ash trees on public land will be carried out over eight years, to maintain the maximum level of foliage and based on the risks they pose, while spreading out the costs associated with this operation.
For branches less than 20 cm in diameter:
The branches must be chipped and disposed of at your expense by a private contractor. The chips resulting from the operation must be no longer than 2.5 cm on at least two sides.
The City does not accept chips at the dump site (Public Works yard).
For branches or trunks over 20 cm in diameter:
The wood must be brought to the Public Works yard at 50 Terra-Cotta Avenue. You must make an appointment in advance by calling 514-630-1230, Monday to Friday, between 8:30 a.m. and 4:00 p.m.
Once on site, you will have to provide the felling certificate number and the associated address.
Failing to bring ash tree branches over 20 cm in diameter to the Public Works yard may result in a fine.
Up until March 14, inclusive, it is prohibited to store for more than 15 days any ash tree waste that has not been processed using a method that complies with by-law PC-2838.
Two grant programs are available to assist homeowners.
1. Special price and grant for treatment
To date, the preventive treatment TreeAzin is the only one recommended by experts that provides fairly effective protection against emerald ash borers. An insecticide is injected into the base of the trunk and remains active for two years.
A special price is available for residential properties. Homeowners should contact the Public Works Department.
- Dead line for inspection request: August 15, 2019
- Dead line to have the special rate: August 31, 2019
A grant equivalent to 50 percent of the treatment cost is also available to homeowners, up to a maximum of $1,500 per residential property every two years. This grant covers ash trees that qualify for the preventive treatment. You should first contact the Public Works Department to have your ash trees inspected.
The treatment must be applied between June 15 and August 31.
2. Felling grant
Any ash tree with more than 30 percent dead branches must be felled. This must be done without delay because a dead tree is dangerous and more expensive to fell. Before felling, you must obtain a permit, which will be issued free of charge.
Felling period: October 1 to March 14.
A felling grant is available to homeowners. It covers ash trees with a trunk diameter of 25 centimetres or more, up to 50 percent of the felling cost to a maximum of $200 per tree.
To qualify for the grant
- 1. Contact the Public Works Department at 514 630-1230 to have your ash trees inspected. If the need for treatment is confirmed, a company selected by the City will perform the treatment at the agreed price. Any other company qualified to perform the preventive treatment may be selected, following the same procedure and subject to the same price.
- 2. Send the receipt confirming payment to the Public Works Department, which will handle issue of the grant by email to the person named on the receipt.
Public Works Department
451 Saint-Jean Boulevard
Pointe-Claire QC H9R 3J3
Replacement of ash trees on private property
Any tree felled must be replaced (zoning bylaw, chapter 9). A tree distribution program is available for homeowners. To increase biodiversity, a selection of 10 indigenous tree species will be offered.
|Year||Number of trees|
Replacement of ash trees on public land
Each ash on public land in parks or along streets will be replaced, in the same location to the extent possible.
An additional 80 trees will also be planted each year to increase the canopy index.
Replacement plan for ash trees on public land:
|Year||Trees planted in parks and along streets||Ash trees planted in Terra-Cotta Nature Park and other woodlands||Total|
For more information, contact the Public Works Department at 514-630-1230 or email@example.com.