Canadian Forest Service Publications
Cherry tree black knot. 1995. Lavallée, A.; Laflamme, G. Laurentian Forestry Centre, Sainte-Foy, Quebec. Information leaflet LFC-16E. 7 p.
Available from: Laurentian Forestry Centre
Catalog ID: 32514
CFS Availability: PDF (request by e-mail)
Black knot is a very widespread disease in North America. In Quebec, it is encountered practically in all regions, wherever its numerous native hosts, all of them Rosaceous plants of the genus Prunus, are found. The striking symptoms of the disease make it difficult to overlook, and we receive regular and numerous reports of its presence. Black knot has little impact on Quebec forests because of the scarcity of black cherry and the small size of our other native cherry trees. It can, however, threaten the survival of fruit trees in some orchards. It mainly affects the aesthetic value and shape of ornamental shrubs.
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