The Woolly Adelgid, a Dangerous Threat to The Eastern Hemlock

The decline of the Eastern Hemlock can be attributed to an invasive species of insect called the Hemlock Woolly Adelgid, or Adelges tsugae. To learn more about this exotic pest, click on the following links:

Hemlock Woolly Adelgid: Species pages and fact sheets
From Virginia Tech
From USDA Forest Service
From the New Hampshire Division of Forests and Lands
From the Hemlock Woolly Adelgid Action Team
From Penn State University

The Woolly Adelgid & Forest Decimation

The Hemlock Woolly Adelgid can decimate a tree 3 to 4 years after infestation. To find out more information on effects of the HWA on the Eastern Hemlock tree, see the following links:

Hemlock Woolly Adelgid fact sheets, pdf publications, and presentations from the USDA Forest Service can be found here and here. Click here for the USDA Newsletter on effects of Hemlock Woolly Adelgid.

How the Hemlock Woolly Adelgid has affected the Shenandoah National Forest