Emerald Ash Borer

The Emerald Ash Borer is an exotic beetle that was discovered in Michigan in 2002. The adult beetles are a minor problem because the only thing they do is nibble on ash foliage. The baby beetles while in their larval stage are the real problem. The larva eat the inner bark of ash trees, and prevent the tree from transporting water and nutrients. Like other invasive species, the Emerald Ash Borer more than likely arrived from cargo coming into the United States from overseas in Asia. The Emerald Ash Borer is slowly spreading and reached New Jersey in 2009. These beetles cause millions of dollars in damages.

Hole left by the Emerald Ash Borer

Source: http://www.emeraldashborer.info/