Hemlocks & HWA

Click on any of the following categories to learn more: The Importance of Hemlocks World-wide distribution Eastern hemlock (Tsuga canadensis) Carolina hemlock (Tsuga caroliniana) Pests & Pathogens Hemlock Woolly Adelgid (HWA) Elongate Hemlock Scale Hemlock Borer Hemlock Looper Hemlock Tip…

The Importance of Hemlocks

The Importance of Hemlocks

At least ten distinct species of hemlock exist in the world today. A new species, Tsuga ullengensis which occurs on Ulleung Island in Korea was delineated in 2017 by Holman et al.  All Tsuga species occur at roughly the same…

Factors Threatening the Appalachian Hemlock

Factors Threatening the Appalachian Hemlock

The nearly invisible hemlock woolly adelgid (HWA) is primarily to blame for the severe decline of eastern and Carolina hemlock currently taking place in the eastern forests of the United States. There are other factors, however, that exacerbate the HWA…

The Woolly Adelgid

The Woolly Adelgid

The hemlock woolly adelgid (HWA), Adelges tsugae, was first described in western North America in 1924 and first reported in the eastern United States in 1951 near Richmond, VA.  This small aphid-like bug attaches to hemlock trees at the base…