Emerald Ash Borer (don't help it travel to Aitkin County)
Emerald Ash Borer (EAB) has been found in Minnesota. A federal quarantine on ash products has been instituted for the following counties: Hennepin, Houston, and Ramsey. Aitkin County has ash trap trees for EAB detection and are actively on the watch for this insect. If you think that you may have it in your area, the steps that you need to identify it are located at the first link. If, after you have taken these steps you still think that you may have this bug, please contact our department at 218-927-7364.
This is what the exit hole on an ash looks like once it has been infected. It is a D shaped exit hole but very small: