Races of Puccinia graminis in the United States During 1996.

@article{Mcvey1999RacesOP,
  title={Races of Puccinia graminis in the United States During 1996.},
  author={D. Mcvey and D. L. Long and J. J. Roberts},
  journal={Plant disease},
  year={1999},
  volume={83 9},
  pages={
          871-875
        }
}
Stem rust caused negligible yield losses in 1996 in the United States. Wheat stem rust was first found during the second week of April in a field of soft red winter wheat southwest of Houston, Texas. Race Pgt-TPMK continues to predominate, with 66% of 273 isolates from 100 collections. TPMK represented 76 and 63% of the isolates from wheat in fields and nurseries, respectively. Race QFCS was identified at a frequency of 12 and 29% from farm fields and nurseries, respectively, and 26% overall… Expand
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  • 2005
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TLDR
Race NA-27, virulent to Pg-1, -2, -3, -4, and -8, was again the predominant race in the United States, comprising 81% of the 93 isolates from 33 collections. Expand
Races of Puccinia graminis in the United States during 1992
TLDR
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. Expand
Races of Puccinia graminis in the United States During 1995.
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Race NA-27, virulent to Pg-1, -2, -3, -4, and -8, was again the predominant race in the United States, comprising 82% of the 225 isolates from 80 collections. Expand
A Comparison of Virulence Phenotypes in Wheat Stem Rust Populations Reproducing Sexually and Asexually
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A comparison of virulence phenotypes in wheat stem rust populations reproducing sexually and asexually and compared in two populations ofWheat stem rust in the USA, 1980. Expand
Identification of new races of Puccinia graminis f. sp. avenae
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Twenty-two new races of Puccinia graminis f. g. sp. avenae were identified from field collections made in Canada since 1985 or from 1,500 isolates held in storage since 1953 using the current nomenclature of NA races for this pathogen. Expand
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A new set of internat ional hosts for character iz ing the virulence of cultures of Puccinia graminis f. Expand
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The Cobb scale and the modified Cobb (U.S.D.A.) scale were devised for estimating, by means of diagrams, the proportion of the area of a leaf or stem occupied by rust pustules, are presented, providing a basis for more objective and accurate determinations. Expand
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