Definitions
from The Century Dictionary.
- noun A fast knot: opposed to running-knot.
- noun A species of pyrenomycetous fungus, Sphæria morbosa, which attacks plum-trees and some varieties of cherry, forming large, black, knot-like masses upon the branches.
Etymologies
Sorry, no etymologies found.
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Examples
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The fungus is also related to the black-knot fungus on the plum, but its life-history is not yet known.
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In a well kept and well sprayed orchard black-knot is not at all likely to appear.
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Also examine plum and cherry trees for black-knot.
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The civic nature of these problems is appreciated when we realize that it would do little good, for example, for one person to destroy the breeding-places of mosquitoes on his premises, if his neighbors did not do likewise about their homes; or for one orchardist to cut out the blight from his pear-trees or the black-knot from his plum-trees, if his neighbors did not co-operate with him by ridding their orchards of these diseases.
Scouting For Girls, Official Handbook of the Girl Scouts Girl Scouts of the United States of America 1918
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Do not let the cabbage club-root disease breed on wild turnips and other mustards, or black-knot on plum sprouts and wild cherries, or tent-caterpillars on wild cherries and other trees.
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There are four leading difficulties in the growing of plums -- leaf-blight, fruit-rot, black-knot, and curculio.
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The black-knot is best kept in check by cutting out the knots whenever they can be seen, and burning them.
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Orchards that are thoroughly sprayed with bordeaux mixture for the leaf-blight and fruit-rot fungus are less liable to attacks of black-knot.
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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 Dame 1860
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