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Emerald Ash Borer

The Emerald Ash Borer (EAB) has devastated ash trees in southwestern Ontario and parts of the United States since its discovery in Detroit, Michigan in 2002. EAB is an introduced insect pest from Asia that attacks and kills all species of ash (Fraxinus) trees. Note that the mountain ash tree is not a true ash tree (Sorbus sp.) and is not threatened by this pest. EAB is a major economic and environmental threat that has killed more than 20 million ash trees in Ontario. EAB was detected in Thunder Bay on June of 2016. In Thunder Bay, with over 25% of our city's municipal trees (and an unknown number of private trees) being ash, the invasion of this pest is of great concern. Learn how to properly ID ash trees (Fraxinus) and the Emerald Ash Borer beetle and don't move firewood. Let's prevent it's further spread!.

Past events

March 2017:

Emerald Ash Borer is here! Now what?

February 2017:

The Canadian Food Inspection Agency has released its expansion of emerald ash borer regulated area to include Thunder Bay. Please read. EAB Regulated Area expansion 2017.  You can also see the map of the monitoring efforts for EAB from 2016 that include both positive and negative finds. 2016 Map of EAB finds in Thunder Bay

November 2016:

City update:   Tackling the Emerald Ash Borer

November 2016:

City presentation; "City of Thunder Bay: Emerald Ash Borer Strategic Management Plan" which outlines Thunder Bay's Council-approved strategy for addressing the EAB threat in our city. Emerald Ash Borer Strategic Management Plan

August 2016:

Renowned scientist, Dr. Krista Ryall, joined the City and Ministry of Natural Resources and Forestry to analyze samples from municipal ash trees in Thunder Bay.  Scientist Joins in City's EAB Detection Efforts

July 2016:

The City of Thunder Bay EAB Management Plan and Report were brought to Council: City of Thunder Bay Emerald Ash Borer Strategic Management Plan 2014  Read the Report to Council:EAB Report to City Council 2016

July 20, 2016:

Public Information Sessions were held in partnership with the Invasive Species Centre. Read more: Detection efforts intensified

June 2016:

The Emerald Ash Borer was officially confirmed in Thunder Bay. Read the City's news release announcing the discovery: Adobe PDF, 1 page, 128 KB 

July 2015:

Launch of EAB Ribbon Campaign 2015

If you think you have found an EAB beetle please call the CFIA at 1-866-463-6017.

 EAB Signs

EAB and Ash Tree Identification Guide Adobe PDF, 1 page, 31 5KB

Pests that are not EAB but look similar: EAB Look-alikes

Great resource links on everything related to EAB, in particular injections/ protecting ash trees: BioForest EAB resource; Forest Invasives

    EAB Task Force

    The City of Thunder Bay, together with the Ministry of Natural Resources, Canadian Food Inspection Agency and a number of public, private and non-profit agencies have joined together as the Emerald Ash Borer Task Force Northwestern Ontario to address the threat that EAB poses to Northwestern Ontario. EAB Partners include:

    Task Force Partners

    EAB Task Force

    The EAB Task Force is currently developing strategies for EAB's arrival to the northwestern region which include:

    • What you can do - Tips for Fighting Back Against the Emerald Ash Borer


        Find out more about EAB at

        Back to Common Tree Concerns