Hemlock Woolly Adelgid – Adelges tsugae (Annand)
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.
Hemlock woolly adelgid was first reported in Canada in British Columbia in the 1920s and in the United States (Virginia) in the 1950s. It was also detected and eradicated in Ontario in 2011 and 2013, and has been establishing itself along the eastern coast of the United States. In 2017 it was detected in Southwestern Nova Scotia and the CFIA continues to survey for the pest to determine the extent of its spread.
What information is available?
- Hemlock Woolly Adelgid Infested Places Order
- News release: Hemlock Woolly Adelgid confirmed in Nova Scotia
- Notice to industry: New movement restrictions in place to prevent the spread of hemlock woolly adelgid
- Questions and answers: Hemlock Woolly Adelgid
- Don't move firewood campaign
- D-07-05 - Phytosanitary requirements to prevent the introduction and spread of the Hemlock Woolly Adelgid (Adelges tsugae Annand) from the United States and within Canada
- Pest Fact Sheet
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