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Ecology and Epidemiology

Influence of Vesicular Arbuscular Mycorrhizae on the Growth of Apple and Corn in Low-Phosphorous Soil. R. P. Covey, Associate plant pathologist, Washington State University, Tree Fruit Research Center, Wenatchee 98801; B. L. Koch(2), and H. J. Larsen(3). (2)(3)Associate horticulturist/associate soil scientist, and assistant plant pathologist, Washington State University, Tree Fruit Research Center, Wenatchee 98801. Phytopathology 71:712-715. Accepted for publication 16 December 1980. Copyright The American Phytopathological Society. DOI: 10.1094/Phyto-71-712.

Growth responses of apple and corn plants to inoculation with Glomus mosseae were observed in a fumigated low phosphorous soil. In contrast, roots of these crops did not become infected after inoculation with G. microcarpus and no growth responses were observed. Corn was apparently protected from arsenic toxicity by vesicular arbuscular (VA) mycorrhizae. Apple seedlings were more VA mycorrhiza-dependent than were corn plants in this study.