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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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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