I'm not a professional, but have done a lot of reading on EAB over the past few years and Imidochloprid seems to be the leading candidate for prevention. Not really for treatment. It may help if you treat it during the very start of an infestation, but generally, it's more for prevention of infestation.
I'm in the western Chicago burbs and we've had EAB in the area for years. There has been an area with trees removed for it a a couple miles south of me.
Our town is actually tracking those using Imidochloprid in an effort to compile info for how well it's working and potentially reduce the need to take down trees. I have been using an annual root drench of Bayer Advance Tree and Shrub Insect treatment. There are others that now offer an Imidochloprid (Merit) drench as well, but Bayer was one of if not the first available years ago.
I have two ashes that I have treated each year for the last 3-4 years. Hopefully this will help fend off EAB as it gets closer. I feel I have to at least try.