The butternut tree is being killed throughout its range by a canker caused by the fungus Ophiognomonia clavigignenti-juglandacearum, described as a new species in 1979. Although there are no reports of this fungus causing disease outside of North America, it is thought to be an exotic pathogen.
The Northern Research Station is working to save the butternut, by identifying trees with possible resistance, propagating, preserving and testing them further. They are also investigating genetic markers that may be linked to resistance, to help identify more resistant trees. To learn more, contact Michael Ostry, Research Plant Pathologist with the Northern Research Station.
Find research publications about butternut canker disease on Treesearch.