Good News for the Hemlocks!

hemlock infected

… those at higher elevations, anyway! Tennessee Natural Heritage Botanist Todd Crabtree alerted us to a report that the hemlock woolly adelgid cannot survive temperatures below 5 degrees. The higher elevations in the Smokies have seen -10, definitely cutting back on this invasive pest. We have yet to see what that means for the South Cumberland Plateau. Tomorrow night, temperatures are predicted to fall to 9 degrees, not quite cold enough! This drawing shows a twig of an infected hemlock. The white “dots” are fuzz-encased adelgids, munching at the base of the needles.


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