This medium sized tree is one of the only ash species found to be tolerant to the Emerald Ash Borer. This can be attributed to the coevolution of both species in their native range in Asia. Living alongside each other and evolving together has made the Mancana ash less desirable to the insect. In some areas it has been reported that the Emerald Ash Borer hasn't attacked any of the Mancana ash. Like most ash trees, the Mancana can tolerate some very harsh conditions. At this time, this is one of the only species of ash tree that should be planted.