If left untreated, HWA infestations can result in hemlock tree death within 3-5 years of infestation ... In the U.S., all HWA reproduction is asexual, but a sexual generation does occur in its native ...

Hemlock woolly adelgid poses a significant threat to Eastern Hemlock trees in Michigan — an infestation can kill a large, otherwise healthy tree in less than a decade. Properties within 10 miles ...