hemlock woolly adelgid

Hemlock Killer Makes Its Way to Western Pennsylvania

Apr 29, 2013

A small killer is making its way through Pennsylvania, leaving dead hemlock trees in its wake.

According to the Pennsylvania Department of Conservation and Natural Resources (DCNR), the hemlock woolly adelgid has been detected in Cook Forest State Park in Clarion County and Clear Creek State Park in Jefferson County.

The hemlock woolly adelgid (HWA) is an invasive beetle-like insect originating from southern Japan. The adelgid multiplies at the base of a tree and moves upward attaching itself to the underside of branches.