Area sellers of live and live-cut Christmas trees say they are selling fewer than in the past. Opinions differ regarding why that change is occurring. John Effinger, owner and manager of Frank Otte Nursery on Ring Road in Elizabethtown, thinks allergies are to blame. His grandchildren’s allergies are why he and his wife had to buy an artificial tree after bringing live-cut trees into their home every year as they raised their own children. “I think the environment is too clean today,” he said.