Hemlock Woolly Adelgid

Hemlock Woolly Adelgid or HWA, is a small aphid-like insect that causes the decline and death of Eastern Hemlock trees. They lay clusters of eggs in white woolly sacs. Eastern Hemlock trees are native to eastern North America and are a dominant species that are found in old growth forests. They are one of the longest-lived trees in our part of the world and can live up to 800 years.

HWA kills the tree by feeding on the base of the needles, which results in needle loss, foliage thinning and tree death. They can kill a hemlock tree within just 4 years of initial contact and have a 90-95% mortality rate. Although the insect has not yet been found officially within the town, it is in Bridgewater.

The Town recently had hemlock trees in Park Cemetery and Jubilee Park treated so that they are protected from the pest. It is recommended that those who have hemlocks and who wish to retain them, get their hemlocks assessed and treated as soon as possible.

For more information, contact Lauren Clark at [email protected]