Snover, K.L. and P.A. Arneson. 2002. Black knot. The Plant Health Instructor. DOI: 10.1094/PHI-I-2002-0926-01.

DISEASE:  Black knot

PATHOGEN:  Apiosporina morbosa (Syn. Dibotryon morbosum, Plowrightia morbosum)

HOSTS:  members of the genus, Prunus, mainly affecting cultivated plum, prune and cherry and to a lesser extent wild plum and cherry.

Authors
Karen L. Snover, Cornell University
Phil A. Arneson, Cornell University

Black knot on plum twig (Used by permission of P.A. Arneson)