PHOTO BY TRACY LESKEY Gerrardstown, West Virginia, apple grower George Behling is one very concerned grower. He first saw this stinkbug two years ago, but didn’t distinguish it at first from ordinary stinkbugs, which have been a pest on his York apples over the years. This last year, the distinction became clear. “The corking I sometimes saw on Yorks was nothing compared to this,” he said. “When you cut into the dings with a knife, what you see is not pretty.” The small pits on the surface are underlaid with corky ­tissue and brown streaks that run to the core. […]