black knot

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black knot

A disease of the plum, the cherry, and related plants caused by the fungus Apiosporina morbosa and resulting in black knotlike swellings on the branches.

black knot

(Life Sciences & Allied Applications / Plant Pathology) 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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Noun

black knot - disease of plum and cherry trees characterized by black excrescences on the branches

plant disease - a disease that affects plants

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