Each link listed below leaves this Forest Service website. We are not responsible for the content of these websites. Each website below is for informational purposes only.

• Forest Disturbance Processes: Hemlock Woolly Adelgid—US Forest Service Northern Research Station
• Hemlock Woolly Adelgid—Virginia Cooperative Extension
• The Effect of the Hemlock Woolly Adelgid, Adelges tsugae (Homoptera: Adelgidae)—Department of Agriculture, 20014 Annual Report
• The Threat of the Woolly Adelgid—The friends of Hemlock Gorge