Powdery Mildew (Leveillula taurica) on Native and Cultivated Plants in Arizona. J. D. Mihail, Department of Plant Pathology, University of Arizona, Tucson 85721. S. M. Alcorn, Department of Plant Pathology, University of Arizona, Tucson 85721. Plant Dis. 68:625-626. Accepted for publication 21 March 1984. Copyright 1984 The American Phytopathological Society. DOI: 10.1094/PD-68-625.

Leveillula taurica was observed for the first time in Arizona on tomato, guar, and on the native hosts Nicotiana trigonophylla (wild tobacco) and Caesalpinia gilliesii (desert bird of paradise). The disease occurred from mid-September through November over the southern half of the state.