What is Black Knot?
Black knot is a widespread fungal disease that is affecting many trees and shrubs across Calgary. It can be identified by large black growths on twigs and branches, and is highly contagious. The City of Calgary and Government of Alberta offer excellent descriptions and information about Black Knot in the links below:
Examples of Black Knot
To help you identify Black Knot on your trees and shrubs, please refer to the pictures below:
How do I treat Black Knot?
Black Knot is a fungal disease that has infected an entire tree or shrub by the time it is visible. It cannot be cured, but it can be controlled or managed with the intention of extending the life of the plant and maintaining the appeal of the plant.
Most often, sections of the tree or shrub containing black knot can be pruned to reduce the spread of the disease.
** Proper pruning techniques should be used.
** In addition, pruning tools should be cleaned often with a bleach solution to reduce the spread of disease.
** Finally, any infected branches should be destroyed after pruning.
For assistance, please contact Tigershark Properties by clicking on this link, or contact a certified arborist that you trust.
Black Knot coverage in Local Media
