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black chaff

American

noun

Plant Pathology.

a disease of wheat, characterized by dark, elongated stripes on the chaff, caused by a bacterium, Xanthomonas translucens undulosum.

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black chaff

An authority on plant pathology, he is credited with discovering the black chaff and yellow stripe rust which attacks Argentine wheat.

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023