The Emerald Ash Borer has made another leap westward. The Nebraska Department of Agriculture has confirmed the presence of the emerald ash borer in Cass County, just ten days after it was confirmed in Omaha. The department says the invasive beetle was found on private property in Greenwood. Emerald ash borers have spread to at least 25 states and killed millions of trees. Trees usually die within five years once they are infected, but treatment is able to save them.