The Town has conducted a complete inventory of the more than 12 000 City-owned trees located in parks and street right-of-ways to identify their characteristics and geodesic positioning. This first phase of inventory was conducted in partnership with specialists from the firm Novafor Inc. The second phase of the city-wide inventory involved identifying ash trees of all species on private property, a task for which the Town retained the services of Trame-Verte also specializing in urban forestry.
In June 2016, glue traps containing a substance with properties attractive to the insect were installed in six strategic locations to detect the presence of the EAB. In sectors having tested positive for the EAB, a more comprehensive inspection is undertaken within a 200 metre radius around the infested tree to help determine the extent of infestation in the area. The second test phase scheduled to begin at the end of September is carried out by applying a technique known as branch sampling on some 60 publiclyowned trees. Said process involves cutting off two branch samples from every selected tree and removing thin slices of bark from these branches looking for larvae or larvae tunnels.
Over the summer of 2016, some hundred publically-owned ash trees will be selected for treatment with Tree-Azin, a biopesticide used to neutralize EAB infestations. The selection process is based on a number of criteria including tree location, its diameter (more than 15 cm) and its overall health. Once the Town has called for tenders for the treatment of public trees with Tree-Azin, citizens will have access to the same rates for treating their own ash trees.
Ash trees infested by more than 30% can generally not be saved and must be felled. A plan focusing on the diversification of tree species is currently in development to replace felled ash trees. The plan also addresses a proactive approach to plant trees – approximately 50 per year – in strategic locations to ensure the growth of the urban canopy coverage (aerial view of the tree coverage on the ground).
As a preventive measure against the spread of the EAB, the Town offers a free branch pick-up/on-site shredding service, in weekly rounds in the spring and fall, and on call at any other time: 514 630-2727. The shredding of branches allows both the town and its citizens to reuse the wood recovered into wood chips to embellish flower beds and landscape arrangements.