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Beetles Battle the Hemlock Woolly Adelgid

adelgid_photo_smDubbed the “Redwood of the East”, eastern hemlock is a long-lived and slowing growing giant that can reportedly live up to 800 years-old and reach heights of more than 150 feet. The species is considered to be the most shade tolerant tree in the Eastern US and is an ecologically important component of Southern Appalachian forests. The dense shade cast by the evergreen tree’s canopy creates critical wildlife habitat, stabilizes stream banks, and keeps mountain forests and streams cool.

Many forest and aquatic species depend on the presence of hemlocks, whose numbers have declined significantly in the past 10 years due to the introduction and spread of the hemlock woolly adelgid (HWA). In fact, by 2010 all NC counties within the historic range of hemlocks were infested. This tiny aphid-like insect has wreaked havoc on both eastern and Carolina hemlocks by literally sucking the trees dry and injecting saliva that distorts plant growth. Under high infestation rates, HWA can cause tree death in as little as four to seven years. Read more

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