A Region golf course known for its tree-lined holes is losing hundreds of those trees to an exotic beetle. In Highland, an estimated 550 ash trees at Wicker Park have been infested by the Emerald Ash Borer. About a-hundred trees have been cut down. Different trees are going into replace them, about seventy this year and another seventy next year, with the help of a state grant. Entomologists say larvae of the Emerald Ash Borer feed on the inner bark of ash trees. The beetle was found in northern Indiana a decade ago, and is believed to have arrived in the United States on solid wood packing material in cargo ships or airplanes originating in its native Asia in the early 1990s.