In the 1950s, a tiny sap-sucking insect arrived on imported nursery plants: it is still threatening Appalachia’s hemlock forests, tree by tree

For generations, towering eastern hemlocks have shaded streams, cooled forest floors, and provided habitat for wildlife in ...
PBS

Tech Bytes: Invasive Species To The Hemlock Tree

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Purdue University

Hemlock Woolly Adelgid: Distribution Update

Purdue Landscape Report: The hemlock woolly adelgid (Adelges tsugae) continues its eastward spread across the US. In 2022, seven new counties were added to the distribution map of this invasive insect ...