Black-knot
a disease of plants, especially of plums and cherries, characterized by black knotlike overgrowths on the branches, twigs, etc., caused by a fungus, Dibotryon morbosa.
Historical Examples
The Cherries of New York U. P. Hedrick
Handbook of the Trees of New England Lorin Low Dame
Northern Nut Growers Association, Report of the Proceedings at the Fourth Annual Meeting Various
noun
a fungal disease of plums and cherries caused by Dibotryon morbosum, characterized by rough black knotlike swellings on the twigs and branches
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