Effect of Soil pH on Cephalosporium Stripe in Wheat. Connie S. Love, Research Assistant, Crop Science Department, Oregon State University, Corvallis 97331. G. W. Bruehl, Professor Emeritus, Department of Plant Pathology, Washington State University, Pullman 99164-6430. Plant Dis. 71:727-731. Accepted for publication 2 April 1987. Copyright 1987 The American Phytopathological Society. DOI: 10.1094/PD-71-0727.

Incidence of Cephalosporium stripe (Cephalosporium gramineum) in wheat (Triticum aestivum) increased with increased soil acidity down to pH 4.5, the lowest pH tested, in both greenhouse and outdoor trials. In greenhouse trials with high levels of inoculum, disease incidence was high in acid soil in the absence of known physical root injuries. Evidence is presented that the susceptibility of some cultivars may be affected more by soil pH than that of others. The susceptibility of winter wheats in the greenhouse was similar to field reactions of the cultivars.