found: Work cat.: Ostry, M.E. Butternut, 1994:p. Y1 ("Butternut (Juglans cinerea) is being killed throughout its range in North America by Sirococcus clavigignenti-juglandacearum, a fungus of unknown origin causing multiple branch and stem cankers that eventually girdle infected trees. Sprouts, if they develop, are also infected and killed usually within the first few years. The disease was first reported in Wisconsin in 1967 ... The fungus was described as a new species in 1979 and only butternut is known as its natural host ...") p. 2 ("Care needs to be exercised in evaluating trees for butternut canker so that trees with dead branches are not automatically considered diseased.")
found: Walnut insects and diseases, 1979:p. 69-71.
found: Nicholls, T.H. How to identify butternut canker, 1978.
found: Black walnut for the future, 1982:p. 27-31.
found: Plant disease:68: 613-616 (1984).
found: EPA list of plant pathogens.