. Fig. 4^. Distribution of v/heat nematode, Tylenchus tritici Black chaff caused by Bacterium translucens var. unxiulosum Smith, Jones & Reddy Black chaff was reported as occurring only in Arkansas, Kansas, Colorado, Iowa, Nebraska, South Dakota, and Montana. It did no appreciable damage, accord-

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Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1920, bookyear1922