Black Knot on Plums and Cherries
A fungus disease aptly named Black Knot afflicts backyard plum or cherry trees with grotesque hard black knots
growing on twigs and branches. The disease can be especially severe in home orchards and landscapes where
gardeners may not be pruning, spraying and cleaning up fallen leaves and fruit. Black Knot also affects
ornamental flowering cherries, peaches and plums, as well as wild plum and wild cherry trees.
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Creator: George W. Hamilton