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.
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.
It is prohibited to store ash tree residue that has not been processed using a compliant method during pruning and felling, pursuant to By-law PC-2918 Regarding the Fight Against the Spread of the Emerald Ash Borer. Failure to comply with this by-law may result in a fine.
For branches less than 20 cm in diameter:
The branches must be chipped and disposed of at your expense by a private contractor. The resulting woodchips must not exceed 2.5 centimetres on at least two sides.
The City does not accept woodchips at the dump site (Public Works yard).
For branches or trunks over 20 cm in diameter:
Wood logs or sections of various lengths must be brought to an authorized treatment site:
For work carried out between October 1 and April 30:
The wood must be brought to the Public Works yard located at 50 Terra-Cotta Avenue. You must first make an appointment by calling 514-630-1230, Monday to Friday, from 8:30 a.m. to 4:30 p.m.
Once on site, at the attendant booth, you will have to provide your identification, the felling certificate number and the associated address.
For work carried out between May 1 and September 30:
Wood must be brought to the following authorized sites:
- Ville de Montréal ecocentres, complying with admission requirements (fees may be charged depending on the quantity of wood):
See schedules on the following website: http://www1.ville.montreal.qc.ca/banque311/content/%C3%A9cocentres-coordonn%C3%A9es-et-horaires
- Multi-Recyclage (fees apply)
140 rue Saulnier, Laval (QC)
Monday to Friday: 5 a.m. to 7 p.m.
Saturday: 7 a.m. to 4 p.m.
- Your contractor may also dispose of the wood by bringing it to another processing site outside the City’s territory.
Two grant programs are available to assist homeowners.
1. 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. The felling of infested or dying ash trees is now authorized year-round.
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 $500 per tree.
To get the grant
Send the receipt confirming payment to the Public Works Department, which will issue the grant by email to the person whose name appears on the receipt.
2. Special price and grant for treatment
Owners of trees that have already been treated for the emerald ash borer will be eligible for a grant for a new treatment, equal to 50% of the cost, up to $1,500 per address. Current knowledge shows that it is not recommended to start a new treatment on an infested tree.
- Dead line for inspection request: August 15, 2020
- Dead line to have the special rate: August 31, 2020
The treatment must be applied between June 15 and August 31.
To qualify for the grant
- 1. If your ash tree(s) have already been treated, contact the Public Works Department at 514-630-1230 to have your ash tree(s) inspected.
If the need for treatment is confirmed, a company selected by the City will apply the treatment at the agreed rate. Any other firm qualified to apply the preventive treatment can be selected, using the same procedure and the same rate.
- 2. Send the receipt confirming payment to the Public Works Department, which will issue the grant by email to the person whose name appears 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|