Where has the Emerald Ash Borer been found?
In 2002, EAB was thought to occur in six counties in southeastern Michigan: Livingston, Macomb, Monroe, Oakland, Washtenaw and Wayne, and in Essex County Ontario. Our ability to detect and find EAB has substantially improved since then, however, and we now realize that a much greater area was infested than what was initially thought. Now there are only three counties in Michigan where EAB has not been detected. It has also been found in Indiana, Ohio, Illinois, Pennsylvania, West Virginia, Virginia, Wisconsin, Missouri, Maryland, Ontario, and Quebec, making EAB an international pest problem. Most of these infestations are not new (i.e., EAB has not spread this far in the past 5 years). We are simply getting better at finding infestations as survey methods improve. However, it is important to watch for signs and symptoms of EAB in non-quarantine areas where the beetle may have been accidentally transported in ash firewood.
