Hello Gardeners, I’m Amanda McNulty with Clemson Extension and Making It Grow . History is filled with examples of municipalities choosing a favorite species for their main street trees to devastating results. Central Park In the early 1980’s was losing more than 100 elms every year. In Denver, 1.45 million ash trees will die from the Emerald Ash Borer unless they are treated every two years with a systemic insecticide. Horned oak galls are only occasionally so numerous as to damage trees. But