Since emerald ash borer arrived in Michigan in 2002 a lot of great research has been done to understand how to manage trees with EAB present. This work has also resulted in extension publications that will help us deal with EAB here in NC. I will link to these important publications and develop new publications specific to NC if they become necessary.
The ultimate source for EAB information is the website EmeraldAshBorer.info which is a collaborative effort of the USDA Forest Service, Michigan State University, Purdue University and Ohio State University.
How do I know if my tree is infested? There are other Common Ash Pests so the first step is to be sure you have an ash tree and see if your symptoms match those of other pests. See this publication on EAB Signs and Symptoms.
There are insecticide treatments that will help protect trees from emerald ash borer. See “Insecticide Options for Protecting Ash Trees from Emerald Ash Borer”
There are a few products available to homeowners for protecting ash trees. But there are many considerations before committing to protecting a tree. See the “Emerald Ash Borer: Homeowner Guide to Insecticide Selection, Use, and Environmental Protection“