Categories Articles Mistletoe is actually a tree-killing parasite — here’s how it became a Christmas icon Post author By crystalg Post date December 23, 2017 Business Insider Feedburner Tags Actually, Became, Christmas, Here's, icon, Mistletoe, Parasite, treekilling ← Former US attorneys, GOP officials come to Mueller’s defense → At Least 75 Dead in Philippines After Tropical Storm Unleashes Flash Floods