"Black-walnut canker caused by a Nectria."; "Ashcroft, J. M. (Joseph Myers), 1900-"; "Black walnut--Diseases and pests--West Virginia.", "Canker (Plant disease)--West Virginia."; "Ashcroft, J. M. (Joseph Myers), 1900-"; "1932"; "

Journal article reprint from: Phytopathology, v.22:no.3 (1932:Mar.).

"; ""; "P12114"; "pec"; "Black walnut--Diseases and pests--West Virginia.", "Canker (Plant disease)--West Virginia."; "14256"; .