Abstract
Wheat stem rust overwintered in southern and east central Texas, southern Louisiana, and southeastern Alabama. Yield losses to stem rust of wheat were traces, but a 1% yield loss in barley occurred in North Dakota. Race Pgt-QCCJ was the most common race, making up 50% of the 450 isolates from 170 collections. If only the 89 collections from wheat were considered, the most common races were Pgt-TPMK, QFCS, and QCCJ, comprising 53, 21, and 16% of the isolates, respectively. Eighty percent of the isolates of QCCJ were from cultivated barley, and 90% of all isolates from cultivated barley were race QCCJ. No virulence was found to wheat lines with «single» genes Sr13, 22, 24, 25, 26, 27, 29, 30, 31, 32, 33, 37, Gt, or Wld-1
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