black rot

noun Plant Pathology.

any of several diseases of fruits and vegetables, characterized by black discoloration and decay of affected parts, caused by fungi, as Guignardia bidwellii, or bacteria, as Xanthomonas campestris.

Nearby words

black raspberry, black rat, black ring, black rod, black root rot, black rot, black ruff, black run, black russian, black rust, black sage

Origin of black rot

An Americanism dating back to 1840–50

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for black rot

In the grape regions of the South and Southwest, it is too susceptible to fungi especially the mildews and black-rot.
The Grapes of New York|U. P. Hedrick
The disease is combatted by dusting with flowers of sulphur or by spraying with bordeaux mixture as for black-rot.
The Grapes of New York|U. P. Hedrick
Vulpina is less resistant to black-rot than stivalis but somewhat more resistant than Labrusca.
Manual of American Grape-Growing|U. P. Hedrick
Spraying with bordeaux mixture, as recommended for black-rot, is usually sufficient to keep the disease in check.
Manual of American Grape-Growing|U. P. Hedrick

The vines are resistant to mildew, black-rot, and anthracnose and are strong, vigorous growers.
Manual of American Grape-Growing|U. P. Hedrick

British Dictionary definitions for black rot

black rot

noun

any of various plant diseases of fruits and vegetables, producing blackening, rotting, and shrivelling and caused by bacteria (including Xanthomonas campestris) and fungi (such as Physalospora malorum)

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012