The hemlock woolly adelgid (HWA), Adelges tsugae, is a non-native insect that feeds on sap and stored nutrients of eastern hemlock trees. This species, originally from Asia, has infested hemlocks in the eastern United States since its accidental introduction in the 1950s. The insects are small and settle at the base of hemlock needles where they insert piercing, sucking mouthparts to feed. They cover themselves with a white, waxy secretion giving them the characteristic “cotton ball” appearance on the underside of the needles. Since its introduction, HWA has spread throughout the native range of eastern hemlocks and has altered hemlock ecosystems in the eastern United States. To learn more about this insect pest and control options available, please use the links provided in the resource library below.
Additional Resources
[posts_table columns="image,title:Title,cf:id_number:ID,content:Description,tax:Media,button" post_type="document-library" rows_per_page="5" exclude_term="Audiences:no, Media:news-releases" term="document-tags:hemlock-woolly-adelgid" filters="tax:document-category:Select Category,tax:Media:Select Content Type" search_box="true" reset_button="true"]Contact Us
For more information or questions, e-mail us or use our contact form.