The bulk of the research largely has been driven by the U.S., but quite a few of my Canadian Forest Service colleagues and others in academia do work directly with the U.S. scientists as well. In a sense, the science isn't respecting the borders either in that regard. There is a fairly significant effort on the way. Could there be more done? Absolutely, there's no question about it.
The emerald ash borer is a particularly nasty invasive species. At this point in time, colleagues tell me that we could lose the entire genus Fraxinus in North America, which is striking. The last time we had something nearly as bad as this was with the chestnut blight about 100 years ago.
There are significant issues, not only from the point of view of urban forestry but forestry in general, in regard to the impacts of the emerald ash borer. Effective management of the emerald ash borer remains elusive. We have yet to really develop a way that we can deal with it. Just that very statement alone indicates that additional research is desperate for new solutions.