In 2002, an Asian beetle was found in Southeastern Michigan and in Windsor. This beetle infested and killed North American green, blue, black, and white ash. Larvae caused the damage. They fed in galleries or tunnels.
This happened in the phloem, which is located beneath the bark. The galleries stop water from flowing properly and rob the tree of nutrients. Eventually branches will die and then the entire tree. You can see that adult beetles will end up leaving D-shaped holes when they exit the trees. Adult beetles can get to be as long as 5/8 of an inch. They have green wings that stand out and seem to be metallic and a red or purplish abdomen. You can find these beetles at the end of May through the beginning of September. They are most popular in the months of June and July.
Right now, infestations have been discovered in many parts of the world such as Allen, Ashland, and Auglaize. They have also been discovered in Belmont, Butler, and Clark. You can find them in Clermont, Clinton, and Columbiana. They are also in Crawford, Cuyahoga, and Darke. Infestations have also been found in Defiance, Delaware, and Erie. They have been in places like Fairfield, Franklin, and Fulton. They can be found in Geuga, Guernsey, and Greene. The Emerald Ash Borer is also in places like Hamilton, Henry, Hancock, Knox, Hardin, Lake, Licking, Lawrence, Lucas, Logan, Lorain, Mahoning, Madison, Marion, Medina, Montgomery, Mercer, Miami, Muskingum, and Morrow. Infestations have also been found in Ottawa, Pickaway, Perry, Paulding, Pike, Putnam, Portage, Richland, Scioto, Sandusky, Seneca, Summit, Shelby, Trumbull, Union, Warren, Wayne, Williams, Van Wert, Wyandot, and Wood.