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Effect of Stem Rust on the Yield of Wheat 1
Author(s) -
Suneson Coit A.
Publication year - 1954
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1954.00021962004600030003x
Subject(s) - yield (engineering) , stem rust , citation , agronomy , mathematics , agricultural science , horticulture , library science , computer science , biology , cultivar , physics , thermodynamics
STEM rust probably is the most serious disease widely prevalent on the wheat crop. In most attempts to measure its effect on yield, there usually has been such a confounding of genetic, pathologic, and environmental factors that the effect of stem rust itself was not determinable (4). Yield reductions of from 6.7 to 9.2'% for each 10'% increase in stem rust in Canada (2), and comparable values only half as large in California (7) are typical of the variation. It is not surprising therefore that an extensive review of the problem of appraising the destructiveness of cereal rusts resulted in a recommendation for a greater use of genetically similar stocks (1). The development at Davis, Calif., of essentially isogenic strains differing in genetic expression of resistance to stem rust permitted paired testing under rust-epidemic conditions. The results show that rust often may be less damaging than is commonly thought and that high resistance may not be necessary for many practical situations.