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Black Knot
Black knot of plums and cherries is a widespread and serious disease . Black knot is a common disease on wild plums and cherries and in home orchards where pruning and spraying are not regularly practiced.
The disease becomes progressively worse during each growing season and unless effective control measures are taken, it can stunt or kill the tree. The black knot fungus can infect American, European, and Japanese varieties of cultivated plums and prunes. Sweet, tart, and Mahaleb cherries are also affected by the fungus, but are generally less susceptible than plum or prune. Occasionally, it may also infect apricots, peaches and other Prunus species. |
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