Solution to woolly adelgid mystery?

Ever seen a batch of hemlock trees and thought there was light snow on its needles? Unfortunately, it was likely sacs of the woolly adelgid, an insect that will infest and eventually kill hemlock trees. The Woodfin Watershed at the end of Blackberry Inn Road is one of many areas that have had problems with the woolly adelgid picking away at its hemlocks. The Smoky Mountain National Park has seen some promising results results in their efforts to curtail the problem. Here is an article from the Knoxville News-Sentinel.