EAB brochure cover enPreventative treatment at preferred price 

Treatment benefits:

  • More economical than felling
  • Ecologically responsible

Services and process
Make your request for preventative treatment before Monday, August 12.
Treatment must be completed by August 31.

Dowload Access Authorization Form and Exoneration of Liability (PDF)



Online form




Treat Ash Trees to Save Them



All ash trees are threatened.The most economical solution is to treat them, otherwise they will have to be cut down (Mandatory permit application request available online).

A concerted effort by the citizens with the City will:

  • Ensure the value of all properties: trees are an added value that represents up to 18% of your property value
  • Preserve our urban forest
  • Save the canopy
  • Protect air quality
  • Reduce water runoff and flooding
  • Reduce heating and cooling costs
If you have further questions, please sens us an email at agrile-eab@beaconsfield.ca



International Authority on Forest Ecology Underscores the Excellence of Beaconsfield's Program

Dr. Daniel Kneeshaw, an independent international authority on forest ecology, has commended Beaconsfield on the excellence of its proactive emerald ash borer management strategies.

Dr. Kneeshaw says that Beaconsfield's plan highlights the City's concern for protecting the environment. He added that its dual strategy of using a biopesticide to treat large trees, while felling small ashes and replacing them with a variety of species guarantees the future of Beaconsfield's urban forest, preservation of our living environment and maintenance of our property values.

This message of support from a Doctor of Forest Ecology and a Professor of Biology at the Université du Québec à Montréal (UQÀM) is particularly important, as Dr. Kneeshaw is an acclaimed expert in ecology and mixed forest silviculture. His research focuses on sustainable forest management, forest dynamics following disturbances, tree mortality and the impact of climate change on forest dynamics.

Dr. Kneeshaw has reviewed Beaconsfield's EAB Management Program in the context of an ash borer infestation raging across North America. Some 100 million ash trees have been killed by ash borers over the past decade.

The professor found Beaconsfield's strategy particularly commendable. He mentioned that many governments merely respond to environmental problems. "Beaconsfield's ambitious proactive measures clearly merit our admiration'' he noted.

Dr. Kneeshaw mentioned that urban forests have many high-value functions in the community, such as reducing runoff after downpours, diminishing heat, improving air quality and boosting property values. It would cost many millions to find replacements for all these benefits. He added that a recent US study showed the massive loss of trees to ash borers also led to the premature death of vulnerable persons.

"In addition to all the other services provided by trees, this particular benefit for our own longevity demonstrates the importance of acting now to maintain our urban forest canopy," Dr. Kneeshaw said.

He also applauded the excellence of Beaconsfield's strategy, based on a dual approach of replacing small trees and protecting large ones. He explained that small trees make a very minor contribution to the canopy, while large ones play key roles in this structure and deliver a multitude of other benefits.

Biopesticides: The Right Decision

Dr. Kneeshaw believes the decision to use biopesticides is the best choice for maintaining the benefits of these trees and ensuring the well-being of residents.

"This biopesticide does not kill ash borers directly. Rather, it impairs their development by preventing larvae from moulting and thus reproducing. The biopesticide's action is specific to insects living in the injected tree. Since ash trees are pollinated by the wind, there should be very little impact on insects attacking other trees," said this university researcher and international authority on ecology and silviculture.

Dr. Kneeshaw added that the selected biopesticide has been approved by the Organic Materials Review Institute for use in organic farming.

Daniel Kneeshaw is also pleased with the help that Beaconsfield has offered residents in obtaining a low treatment cost. This will encourage their participation, which is essential, since most of Beaconsfield's ash trees are on private land.

Dr. Kneeshaw also emphasized the need to diversify the urban forest to enhance its resilience, just like a diverse investment portfolio protects an investor against market swings.

"At the present time, the ash borer is the biggest threat. But invasive species could eventually appear, as in the past thousands of elms were killed by Dutch elm disease. Species diversification is a key factor in maintaining a strong and healthy urban forest," he concluded.

These observations by an international expert are particularly important as they confirm the appropriateness and necessity of Beaconsfield's efforts to preserves its environment and quality of life.

 Consult letter from Dr. Daniel Kneeshaw (PDF in French only)

Regulatory framework for ash trees in wooded areas (Communauté métropolitaine de Montréal)

Regulatory framework - an addition to the regulation (Communauté métropolitaine de Montréal - PDF in French only)

Calendar Critical Periods (Communauté métropolitaine de Montréal - PDF)

Resolution 2014-12-1021 (PDF)

Consult By-Law 720-101 modifying zoning By-law 720 in order to prescribe standards aimed at limiting and controlling the propagation of the emerald ash borer on the territory of the City of Beaconsfield (PDF)

Ash Tree Identification Program on Private Property

As part of its action plan to fight the emerald ash borer, the City of Beaconsfield has inspected ash trees on private property during the summer

Students hired by the City have visited residences to compile an inventory of ash trees in the community. This inventory will help to better understand and predict the extent of the damage that this pest has the potential to inflict.

As a citizen, you can help to prevent an infestation:

  • To protect the health of your ash trees, visit the manufacturer of TreeAzin, a biopesticide, at bioforest.ca for a list of service providers licensed to apply the product;
  • For a health assessment of your ash trees, visit the Société internationale d'arboriculture website at siaq.org to find tree specialists.
  • Do not move ash wood, firewood, logs, branches, nursery stock, chips or any other form of ash wood. 

1. What is the Emerald Ash Borer?

The emerald ash borer is a highly destructive invasive beetle that attacks all species of ash trees and typically kills them in 2 - 3 years. It is a metallic green wood-boring insect of about 1 - 1.5 cm in length. It was confirmed as present in the area of Montreal in the summer of 2008. It has killed a large number of ash trees in North America and poses a major economic and environmental threat to urban and forested areas across Canada and the United States.

eab finger

2. Where does it reside?

Its larvae bore tunnels under the bark to feed on inner bark tissue. The tunnels cut the flow of nutrients and water to leaves, causing the tree to die.




 3. How has it spread?eab bark

This invasive species which came in wood packaging from China, has now spread into areas of Ontario and Quebec as well as 15 states in the USA. The main way that it spreads is from tree to tree that are relatively close but also when ash tree fire wood is transported from region to region, the EAB will move and contaminate a new area.
ash tree
 4. How do I know if I have an Ash tree on my property?
Ash trees are commonly found in streets, parks, and forests in the Montreal area. Ash trees are typically large trees reaching up to 30m tall at maturity.

Branches and leaves grow in an opposite pattern. Where one leaf or branch emerges, another grows directly opposite. Leaves are typically 5 to 15 cm long and compound with 5 to 11 leaflets. Leaflets have either smooth or toothed margins (edges).





ash leafash leaves

Ash seeds hang in clusters of single, oar-shaped seeds and are often shrivelled. Clusters typically stay on the tree until late fall or early winter.

Young trees have smooth, light grey bark. Older trees have furrowed bark with a diamond shaped ridge pattern.

eab young ash   eab old ash

5. What should I be looking for?

Top branches of ash trees usually die off first. Trees can lose half their branches in a single year. Once larvae finish feeding under the bark, they mature into adult beetles that chew their way out of the tree.eab barkS-shaped grooves and D-shaped exit holes 3.5 – 4 mm wide caused by adult beetles (Photo: courtesy Troy Kimoto, CFIA)

Look for the following signs:

  • Loss of leaves and dead branches in the upper part of ash trees.
  • Unusually thin tree crowns
  • Branch and leaf growth in the lower part of the stem where growth was not present before
  • Long shoots growing from the trunk or branches
  • Unusually high woodpecker activity
  • Evidence of adult beetle feeding on leaves
  • Bark splitting, S-shaped grooves under the bark filled
  • Small D-shaped emergence holes
  • Exit holes 3.5 – 4 mm wide caused by adult beetles

6. Is there anything that can be done to prevent an infestation?

The Neem tree produces organic compounds that have been used in India for centuries as an effective way of protecting crops from insect pests. Now, this tropical broadleaf evergreen has been enlisted to help fight the emerald ash borer.
Using extracts from the Neem tree seed as a key ingredient, scientists from Natural Resources Canada worked collaboratively with BioForest Technologies Inc. to develop and commercialize a botanical insecticide called TreeAzinTM.

TreeAzinTM was specifically developed to control invasive wood boring insect pests and it is particularly effective against invasive pests like the emerald ash borer when used as a protective method on lightly infested trees.

7. What is TreeAzin?

Recently registered for use across Canada, TreeAzinTM allows for the treatment of urban trees in the early stages of an infestation.

The TreeAzinTM formulation contains a natural product called Azadirachtins, originating from Neem tree seeds. The insecticide interrupts insect larval moulting occurring under the tree bark. The compound significantly reduces larval growth, development and feeding, and also reduces fertility and egg viability when adults feed on the foliage of treated trees.tree azin nrcSystemic injection of TreeAzin to protect an urban ash tree from the emerald ash borer (Photo: Natural Resources Canada)

Researchers are confident that trees that are highly valued by homeowners and urban foresters can be effectively protected using this technique while other methods of control are developed.

Scientists from Natural Resources Canada's Great Lakes Forestry Centre and BioForest Technologies also jointly developed the injection system to deliver the insecticide. The system consists of pressurized canisters which are connected to the tree in a manner similar to an intravenous system. Once connected, the canisters release the insecticide under the tree's bark and directly into the tree's conductive tissues, and it moves upwards with the flow of water and nutrients.

Because TreeAzinTM is injected directly into the tree, it negates any potential human or environmental exposure, thus strongly mitigating any risks. Tests have shown that azadiracthins have generally very low toxicity to mammals, birds and other non-target organisms, which also enhances its suitability for use in urban and environmentally sensitive areas.

For more information on TreeAzinTM, please visit the manufacturer's website at bioforest.ca

No company is commissioned by the City to make door to door sales or visits.

Consult document from Health Canada (PDF)

8. Is TreeAzin a permanent solution?

TreeAzinTM can be very effective at controlling EAB infestations, but injections need to be applied between the months of May and the end of August. TreeAzin™ does not guarantee the survival of the tree and must be applied every 2 years, depending on tree health and EAB populations at the time of injection.

9. What can I do to contain an infestation if I see one?

  • Learn about the origin and type of your firewood and buy and burn only local firewood
  • Do not move any ash wood, firewood, logs, branches, nursery stock, chips or any other type of ash outside of the island of Montreal.
  • Do not dispose of tree branches (all tree species) in the garbage. In order to comply with the Ministerial Order on the EAB, the City will no longer pick up branches (all tree species) and green waste with the regular garbage collection.

10. Who should I call if I see an EAB on a tree?

  • For a city tree: call Beaconsfield Public Works at: 514 428-4500
  • For a private tree: contact Urban Planning 514 428-4430 for the tree permit request.

11. All requests concerning the felling of trees will now be analyzed in the following manner:

  • Following the deposit of the request, the City inspector will make a visual inspection. If it is an ash tree, the owner must, at his expense, hire a pruner. The pruner then must, in the presence of the inspector, cut two branches of 5cm to 7cm diameter and a length of at least 75cm, located in the middle of the crown of the tree.
  • Should the inspector notice an infestation, the tree may only be felled between September 1 and May 31 of next year. The costs associated with obtaining a certificate of authorization in view of felling an infested tree will be reimbursed. The City inspector will mark the tree with the abbreviation "A".
  • In the case of an ash tree, the owner must mandatorily divulge the name and address of the entrepreneur who will proceed with the felling of the tree.
  • The branches and trunk of the infested tree are the sole responsibility of its owner. Their disposal must be carried out according to the ministerial order, namely:
    • The displacement of wood outside the Island of Montreal is prohibited.
    • The chipping of wood is authorized on the condition that the chips produced do not exceed 2.5cm by 2.5cm in maximum surface, on at least two facings.
  • The City, via Public Works, will no longer accept between April 1 and September 30 of each year:
    • Firewood
    • Trees (except branches of a diameter of less than 15cm)
    • Nursery stock
    • Logs
    • Timber
    • Packaging timber, wood pallets, ship borne tonnage
    • Wood or bark or wood chips of any kind of tree