What is hemlock woolly adelgid?
Hemlock woolly adelgid (Adelges tsugae) or HWA is an invasive insect that develops, reproduces and feeds on all species of hemlock trees. Both Carolina hemlock (Tsuga caroliniana) and eastern hemlock (Tsuga canadensis) are vulnerable to infestation and are currently suffering widespread mortality in the eastern United States. Unfortunately, hemlock woolly adelgid was discovered in Kentucky during the spring of 2006.