Emerald ash borer: Management Plan

The Town is responsible for maintaining or removing Town-owned ash trees (on public property and municipal parks). For this reason, a management plan was developed in order to manage our urban forest, properly control the emerald ash borer infestation (EAB), and protect it from any future infestations.

Public tree inventory:
The first step to creating a management plan was to conduct research to establish the total number of trees, with data on species, size, location, maintenance recommendations and health.

In November 2012, the public tree inventory report was completed (town-owned trees).

Total trees: 3,252
Ash trees: 578 (17.7% of total)

Private tree inventory:
To complete the study, an inventory of privately-owned trees was conducted during the summer of 2013. The data collected included tree species, size, and location. Residents were informed if there was an ash tree on their property. Information was provided regarding treatment options.

In September 2013, the private tree inventory was completed (resident-owned trees).

Total trees: 7,757
Ash trees: 235 (3% of total)

Management Plan:
Hampstead adopted the Slow Ash Mortality (SLAM) program as recommended by the Federal government, and used by most municipalities in Ontario and the United States. The program combines the removal of all infected ash trees along with the treatment and use of TREEAZIN on all uninfected ash trees to slow down the spread faster and further than anticipated.

Once a tree is felled, the plan includes the removal of stumps and the replanting of a replacement tree.

Town responds to EAB infestation:
Based on the results of the public tree inventory, 84 ash trees showed signs of possible EAB infestation. In order to confirm the diagnosis, the Town consulted Montreal’s Parks and Green Spaces department to confirm the presence of the emerald ash borer. The resulting inspection concluded that 70 ash trees were heavily infected and needed to be removed before the April 1, 2013, Federal moratorium restricting the movement of wood. The following actions were taken:

March 2013: The Town removed the 70 heavily-infected ash trees.
June 2013: 126 ash trees were treated with the bio-pesticide, TreeAzin.
July 2013: Tree stumps were removed.
October 2013: Replacement trees were planted.


In January 2014, all 508 remaining public ash trees were inspected by Town employees to determine the level of EAB infestation. Of these, 59 were confirmed to be heavily infected and scheduled for removal before the Federal moratorium. The following actions were taken:

March, 2014: The Town removed 59 heavily-infected ash trees.
Summer 2014: Tree stumps were removed
November 2014: The Town removed 19 heavily-infected ash trees.
Fall 2014: Replacement trees were planted.


The 2014 inspection revealed that the EAB infestation had spread rapidly throughout the Town during the year. Due to the geographical extent and visible signs of infestation, the Town decided that TreeAzin was no longer a viable treatment option, and would be limited to the 126 trees treated in June 2013. To note, one of the 126 trees treated had died and was removed in March 2014.

In 2015, the third year from original infestation, the Town continued to monitor the remaining 449 public ash trees, removed the most heavily infected trees and their stumps, and replanted replacement trees. In 2013, 126 ash trees were treated with the bio-pesticide, TREEAZIN and a second treatment was applied this year.

March 2015: The Town removed 66 heavily-infected ash trees.
July 2015: The second treatment of TreeAzin was applied.
  - Of the 126 trees treated in 2013, 30 died and were felled.
  - A total of 96 ashes were treated.
Summer 2015: Stumps were removed.
Fall 2015: Replacement trees were planted.
November 2015 The Town removed 34 heavily-infected ash trees.


In 2016, the fourth year from original infestation, the Town continued to monitor the remaining 349 public ash trees, removing the most heavily infected trees and their stumps, and replanted replacement trees.

March 2016: The Town will remove 47 heavily-infected ash trees.
Summer 2016: Stumps to be removed.
Fall 2016: Replacement trees to be planted.
Fall 2016: The Town removed 88 heavily-infected ash trees.


Private ash trees (Resident-owned trees):

Residents who have an ash tree(s) on their property are encouraged to inspect and monitor the health of their tree(s). First signs include foliage loss and or deterioration specifically at the top of the canopy. Treatment options include TREEAZIN injections or removal. For assistance, residents should contact a certified arborist to evaluate their tree(s).

In the event that the tree must be removed, residents must apply for a Tree Removal Permit prior to felling the tree. Permit fees have been waived for the felling of an ash tree.  Please refer to the Tree Removal Permit page.

For further information, please refer to the Canadian Food Inspection Agency website.