Emerald ash borer (EAB), Agrilus planipennis Fairmaire, is an exotic insect from Asia that was discovered in southeast Michigan, near Detroit, and in Windsor, Ontario, in the summer of 2002. Since then, EAB has been found in Ontario, Quebec, and 13 states, including Ohio. All native species of Fraxinus have no natural resistance to EAB and are highly susceptible to EAB, making EAB one of the most serious exotic pests currently threatening North American forests.
This beetle is spreading by natural means, but its movement to new noninfested sites has been accelerated through transportation of infested ash firewood, logs, crates or nursery trees into unaffected areas. Federal quarantines are in place in all infested areas, including 45 counties in Ohio, to slow the spread of EAB throughout states with native ash species.
It is illegal to move ash tree materials and hardwood firewood out of Ohio unless they are shipped under federal compliance agreements or certification.
Location of infestations in Ohio and up-to-date quarantine maps and regulations can be found at the Ohio Department of Agriculture.