Left unchecked, the Hemlock Wooley Adelgid, Asian Longhorn Beetle, and the Emerald Ash Borer would just about wipe out one-third of the trees in North America. Imagine the scene, something out of a sci-fi movie. Just stubs of billions of dead trees across the Southern Tier, and beyond. In today’s column, I will give you some insight into these three little critters that have already, and continue to destroy our forests. First the Adelgids.