The lone voice of horticultural reason

Woolly Adelgid Threatens Hemlock Tree

Why That’s Bad and What You Can Do

05-13-19 – Hemlock woolly adelgid is an invasive (Japan), aphid-like insect that attacks and kills hemlock trees. Its egg sacs, which look like cotton balls or clumps of snow, can be found at the base of needles. It can be spread by wind, animals, and human movement of nursery stock, logs, and other wood products including firewood.

Is this a big deal? Yes. On the east coast of the US and Canada, whole tracts of native hemlock (Tsuga canadensis) have been lost. Hemlocks play a key role in forest environments. All manner of wildlife, including fish, will be impacted by the pest.

Here’s an excellent video documentary on the topic. If you value hemlocks and particularly if you grow any varieties on your property, please view!

Don Engebretson
The Renegade Gardener