Hemlock Woolly Adelgid – Adelges tsugae (Annand)
In its native range within Asia, hemlock woolly adelgid (HWA), Adelges tsugae, is not a very serious or destructive pest. Populations levels are controlled by natural enemies and by host resistance. The HWA was first reported in western Canada (British Columbia), in the 1920's and in the United States (Virginia), in the 1950's. In British Columbia, damage to western hemlock, T. heterophylla, has been minor.
What information is available?
- 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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