Effect of Winter Wheat Cultivar Mixtures on Leaf Rust Severity and Grain Yield

Three different experients involving winter wheat cultivar mixtures and their component purelines were conducted at McGregor, TX, in the 1986−1987 and 1987−1988 growing seasons. The same experiments were also conducted during 1987−1988 at Dallas, Prosper, Stephenville, and Uvalde, TX. In three-way mixtures with the leaf rust susceptible cultivar TAM 107 and the moderately resistant wheats, Collin and TX71C8130R, disease severity and area under the disease progress curve (AUDPC) were reduced in all locations and years compared with the mean of the component cultivars, with the exception of one mixture at Stephenville in 1987−1988 (...)