black root rot

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noun Plant Pathology.

any of several diseases of plants characterized by black or brown lesions on the root.

a common disease of the apple caused by the fungus Xylaria mali.

a disease of tobacco caused by the fungus Thielaviopsis basicola and characterized by retarded growth and wilting.

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Origin of black root rot

First recorded in 1905–10

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Suddenly, however, he became aware of a small black spot far ahead in the very middle of the unencumbered track.
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But at the root of the unnatural miracles is the natural miracle—the heart of man.
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