black knot
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noun Plant Pathology.
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.
Nearby words
black iris, the, black isle, black japan, black kite, black knight, black knot, black land, black lead, black letter, black light, black liquor
Origin of black knot
An Americanism dating back to 1835–45
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for black knot
The fungus is also related to the black-knot fungus on the plum, but its life-history is not yet known.
The branches are very liable to disfigurement by the black-knot and the foliage by the tent-caterpillar.
Handbook of the Trees of New England|Lorin Low DameHappily, black-knot may be controlled by cutting out the diseased wood.
The Cherries of New York|U. P. Hedrick
British Dictionary definitions for black knot
black knot
noun
a fungal disease of plums and cherries caused by Dibotryon morbosum, characterized by rough black knotlike swellings on the twigs and branches
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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