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Emerald Ash Borer Disease (EAB)

Posted on Thursday, February 14, 2013

Emerald Ash Borer (EAB) has been devastating Ash trees in Mississauga, Oakville, Burlington and Milton. EAB has spread throughout southwestern Ontario since 2002. This introduced Asia insect kills all species of ash trees. These insects cut off the flow of water and nutrients within the trees by feeding underneath the bark. All Ash trees are at risk of dying from infestation except the Mountain Ash (Sorbus spp.) which is not a true Ash. Mortality normally takes 2 to 3 years however a severe case can terminate a tree within one season. It is estimated that all Ash trees in the region may be gone by 2017.

The federal Canadian Food Inspection Agency (CFIA) has instituted a quarantine zone through a Ministerial Order including Mississauga, Burlington, Oakville, Milton and most of southern Ontario. The Order prohibits and restricts movement of nursery stock, trees, leaves, logs, lumber, wood, wood chips, bark chips and firewood from all ash species unless authorized by a Movement Certificate issued by the CFIA. This prohibition prevents the spread of the EAB into un-infested areas of Ontario. Arborcorp is authorized by a movement certificate.

How to Identify Emerald Ash Borer – EAB?

What if I have an Ash tree on my property?

Property owners are responsible for their privately-owned trees. Contact the City if your Ash tree is located on city property. You should inspect the condition of your trees regularly using guidance from the PDF links within this notice or contact Arborcorp for a professional tree inspection. If your Ash Tree appears infected, dead or dying, you should contact Arborcorp or an arborist certified with the International Society of Arboriculture (ISA) or registered with the American Society of Consulting Arborists (ASCA). If your ash tree appears healthy, you might consider pesticide injections such as TreeAzin. In some cases, TreeAzin injections may slow the EAB infestation. Pesticide injections have a limited time benefit and need to be repeated every two years. Homeowners are encouraged to plant new trees before or after Ash tree removal.

Healthy trees increase property value, help cool your home and clean the air, along with other environmental, economic and aesthetic benefits. Additional information is available at these links:

Contact Arborcorp (905) 827-9103

For the professional treatment and removal of Ash trees.