black knot


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.

Origin of black knot

An Americanism dating back to 1835–45

Example sentences from the Web for black knot

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