Agronomic tests of new resistant varieties and hybrids of hard red winter wheat in the presence of stem rust and Hessian fly
1943
Reitz, L.P. | Jones, E.T. | Johnston, C.O. | Painter, R.H.
1. A large number of strains and varieties of winter wheat were tested in nurseries under three sets of conditions, namely, (a) generally favorable growing conditions at Manhattan, Kan.; (b) adverse conditions due mainly to stem rust infection at Ramona, Kan.; and (c) in the presence of large numbers of Hessian fly at Springfield, Mo. 2. Agronomic, stem, and leaf rust reaction and fly infestation data are presented. 3. Strains resistant to these pests gave satisfactorily yield and test weight under all three of the environments. In general, susceptible varieties gave good results only at Manhattan since disease and insect injury were not serious factors. 4. While the Marquillo hybrids are not immune from rusts and Hessian fly, the resistance and tolerance appear, from these yield studies, to be of high economic importance. 5. The quantitative evidence presented proves that inherent resistance and tolerance to insects and diseases can give a considerable measure of protection to winter wheats of the central Great Plains.
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