State Agriculture Department officials say the Emerald ash borer beetle been discovered in Madison, Crawford, Knox, and Belmont counties.
The beetle has now been been detected in 63 counties. It has killed tens of millions of ash trees in Ohio, 12 other states, and two Canadian Provinces. The beetle was first found in the U.S. in 2002 near Detroit. Officials believe they arrived via wooden packing crates imported from Asia.