The Pennsylvania legislature designated the eastern hemlock the official state tree on June 22, 1931.This tree thrives in cool, moist sites. It occupies steep north- or east-facing slopes in southern ...
Eastern hemlock trees are a vital foundation species in Pennsylvania forests, supporting the ecosystem and enhancing aesthetics. The hemlock woolly adelgid (HWA), an invasive insect, poses a serious ...
Add Yahoo as a preferred source to see more of our stories on Google. Hemlock wooly adelgids - tiny insects that suck the life out of Eastern hemlocks - can be killed when the temperature drops below ...
As temperatures plunge, Carole Cheah's spirits rise. Her nemesis is being iced. Cheah, an assistant agricultural scientist with the Connecticut Agricultural Experiment Station, has spent more than 30 ...