
Hemlock Woolly Adelgid. “Their name comes from waxy white filaments they make to protect themselves from drying out. These “hemlock vampires” were first discovered in 1951 in Virginia, and by 2005 had spread to fifteen other states.
Source: Paul Hetzler, Cornell Cooperative Extension
Photo source: Connecticut Agricultural Experiment Station, Bugwood.org
We learned of the arrival of this really horrible pest, the Hemlock Wooly Adelgid (HWA), aka the Hemlock Vampires, in NS (and in all of Atlantic Canada) only in Aug of 2017, which seems like ages ago now.
When first discovered, it had already spread though three counties at the southwest extremity of NS (Digby, Yarmouth and Shelburne) so likely had hopped across the gulf of Maine (or got a ride on some wood) from infected areas in the northeastern USA – see map. It is not known in N.B.
The latest update (Dec 31, 2022, below) shows it spreading progressively though the province, now many confirmed sites in Annapolis and Queens Co. and a few in each of Kings and Lunenburg Co. Continue reading