Black Knot Infestation
Cherry, Chokecherry, Plum, and Prune Trees are prone to this fungus.
Black Knott fungus is characterized by lumps (galls) that feed on the tree. Initially the galls may have a cork like appearance in the early stages and, over time may progress from a spongy green mass to the hardened "charcoal like" mass. If left untreated, the tree will become stressed, distorted and ultimately die. This fungus can be spread by wind and rain but can be controlled by cutting and burning the affected branches. Best results will be achieved if pruning is done in late winter/early spring, prior to the release of spores in the spring. Infected branches can be disposed of at the City of Regina landfill. Click here for more information from the White City Garden Club - Resources Page