Hemlock Woolly Adelgid confirmed in Nova Scotia

News Release

Pest detected in Digby, Yarmouth and Shelburne counties

August 3, 2017 – Ottawa, ON – Canadian Food Inspection Agency

The Canadian Food Inspection Agency (CFIA) has confirmed the presence of hemlock woolly adelgid, a regulated pest, in three counties in southwestern Nova Scotia. This is the first time the pest has been detected in Atlantic Canada.

To date, hemlock woolly adelgid has been found in Digby, Yarmouth and Shelburne counties. The CFIA continues to conduct surveys in the areas where the pest was found to determine its spread. Regulatory measures will be put in place as required once the survey work is completed.

Hemlock woolly adelgid is an aphid-like insect that attacks and kills hemlock trees. Its egg sacs, which look like cotton balls or clumps of snow, can be found at the base of needles. It can be spread by wind, animals, and human movement of nursery stock, logs, and other wood products including firewood. You can help prevent the spread of this and other plant pests by buying your firewood where you plan to burn it. If you think you have seen signs of hemlock woolly adelgid in your area, notify the CFIA.

The CFIA is continuing to work with federal and provincial partners to conduct surveys and will update stakeholders and the public as more information becomes available.

Follow the CFIA on Twitter or sign up for email notifications to stay up to date on the latest information about this pest.

Quick Facts

  • Hemlock woolly adelgid is not a risk to human health, but is highly destructive to hemlock trees.

  • Hemlock woolly adelgid is native to Asia. This pest is established in British Columbia and many parts of the United States. It was detected and eradicated in Ontario in 2011 and 2013.

  • Eastern hemlock is processed for use in general construction or pulp. It serves as a foundation tree in the environment and its loss could negatively affect vegetation, bird and mammal health.

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