Emerald ash borer (EAB), Agrilus planipennis Fairmaire, is an exotic beetle that was discovered in southeastern Michigan near Detroit and Windsor, Ontario in the summer of 2002. Before June of 2002, it had never been found in North America. The timeline below illustrates the spread of EAB by state by year. Note: The timeline is best viewed in desktop view.
You can also see the distribution of EAB by county over time.