The Asian Longhorned Beetle (Anoplophora glabripennis) is native to eastern China, Japan, and Korea. However, it has now been accidentally introduced to the United States, where it was first discovered in 1996, as well as Canada and several countries in Europe, including Austria, France, Germany, and Italy. Individuals have been intercepted in warehouses across the United States. Outbreaks of this beetle pose a severe threat to even perfectly healthy trees in both forests and urban and suburban landscapes. A closely related species, A. chinensis, is considered one of the most destructive longhorned beetles in the world (and the longhorned beetles in general are among the most economically important pests of hardwood trees). Anoplophora glabripennis attacks a variety of tree species, including maples (Acer), willows (Salix), poplars (Populus), birches (Betula), elms (Ulmus), and horse chestnuts (Aesculus), among others. Early instar larvae feed beneath the bark of host trees, destroying the cambial tissue; late instar larvae weaken trees by feeding in both sapwood and heartwood, where numerous larval tunnels often result in tree breakage and death. Larvae bore into the main trunk, branches, and exposed roots of both young and old trees. This beetle is believed to have spread out of Asia in solid wood packaging material. (Cavey et al. 1998; Nowak et al. 2001 and references therein; Smith et al. 2001; Hu et al. 2009)