60 Pleasant Street, Bridgewater, NS, B4V 3X9
Tel: 902-543-4651 Fax: 902-543-6876
Emergency After Hours Tel: 902-543-5142

TOB Web banner Hemlock Conservation Project 1About the Hemlock Woolly AdelgidImage 1
Hemlock woolly adelgid (HWA) is an aphid-like insect (aphids suck fluid from plants) that attacks and kills hemlock trees by feeding on nutrient and water storage cells at the base of needles. Researchers believe HWA was first brought to the United States via infested nursery stock in the 1950s and has since established along the eastern coast of the United States with sightings reported from Maine to Georgia.

In Canada, eastern provinces are at-risk due to proximity to HWA populations in the states. In 2017, HWA was found and is now being closely monitored in the southwestern Nova Scotia counties of Digby, Queens, Shelburne, Yarmouth, Annapolis, and most recently, Lunenburg in 2020.

Bridgewater’s Hemlock Preservation Project
Bridgewater’s hemlocks are undergoing severe decline as a consequence of HWA infestation. Without a natural predator, HWA multiplies rapidly, leading to a 90 to 95% mortality rate in eastern hemlocks within four to 15 years unless treated with pesticides. The “Bridgewater Hemlock Preservation Project” aims to address this infestation through:Tree Ribbons web

  • An extensive tree inventory and site preparation (continuously monitoring hemlock tree health)
  • Pesticide treatment (IMA-JET & XYTECT, approved for use by Health Canada)
  • Community engagement and outreach

Town of Bridgewater summer staff will be out & about in parks & trails this summer, undertaking this work.

Ribbons: Help us spread the word
Throughout areas where the Hemlock Conservation Project is taking place, such as Glen Allan Park, you will see RED and YELLOW ribbons ties to trees. These ribbons are NOT to indicate that a tree has been marked for cutting - rather, the ribbons are part of the way that we monitor tree health and part of our tracking process.

About the Eastern Hemlock
The Eastern Hemlock is a conical tree reaching up to 30 meters in height, characterized by shiny green needles with a pale underside and oval-shaped cones. Its bark starts off scaly and deepens into cracks with age. It thrives in moist soils and shade, serves as vital wildlife habitat and is valued for its ornamental appeal and commercial use in woodworking.

Do you have hemlocks on your property and are you wondering what you can do?
If you have hemlocks on your property and you're curious as to what you can do, we invite you to reach out to our Hemlock Conservation Program staff. You can contact us with you r questions at This email address is being protected from spambots. You need JavaScript enabled to view it.. Stay tuned to this page for future updates and additional information.

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