spoke to a forest ranger a few months ago, had an interesting conversation. he said that the ash borer was originally found in michigan/ohio area, and a quarantined was established. at the same time, a nursery that had a significant stock of ash trees was looking at taking a big hit, financially, and sold its entire inventory to some municipality/ies in maryland, defying the quarantine. so this guy is single-handedly responsible for the ash borer's spread to that area. the ranger also felt the it is only a matter of time until the ash is extinct, because of the emerald ash borer. apparently the asian long-horned beetle is quite a lazy creature, crawling from tree to tree, making containment of an infestation much easier. the ash borer is the opposite, however, flying as it pleases and spreading like wildfire.