Emerald Ash Borer
Check out this link from the MN DNR to learn more about the Emerald Ash Borer, it's lifecycle, and maps of where EAB has been located throughout the state.
This decision guide produced by the Indiana DNR and Purdue University can aid in the decision making process when deciding whether to treat or remove an ash tree.
Check out this link to see how Ash tree wood can be utilized after ash tree removal.
The EAB Risk Status will inform you of the current level of risk.