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Germination of Basidiospores of Cronartium comandrae on Rocks and Vegetation. R. G. Krebill, Plant Pathologist, USDA Forest Service, Intermountain Forest and Range Experiment Station, Ogden, Utah 84401, stationed in Logan, Utah, at the Forestry Sciences Laboratory, maintained in cooperation with Utah State University; Phytopathology 62:389-390. DOI: 10.1094/Phyto-62-389.

Basidiospores of Cronartium comandrae exhibited a low capacity to form secondary spores on several kinds of vegetation and rocks common to the Rocky Mountains. This might indicate that germination by repetition only slightly increases the possibility for successful dissemination from comandra to lodgepole pine.

Additional keywords: epiphytology, Pinus contorta, rust.