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Dry Bubble of Oyster Mushroom Caused by Verticillium fungicola. A. Marlowe, Oceanview Mushroom Farm, Huntington Beach, CA 92648. C. P. Romaine, Assistant Professor, Department of Plant Pathology, Pennsylvania State University, University Park 16802. Plant Dis. 66:859-860. Accepted for publication 9 March 1982. Copyright 1982 American Phytopathological Society. DOI: 10.1094/PD-66-859.

Dry bubble disease of oyster mushroom (Pleurotus ostreatus) was first noted in a commercial planting in California in 1981. The disease, caused by Verticillium fungicola, is characterized by a gross malformation and pitting of sporophores. The pathogen also causes dry bubble of the common cultivated mushroom (Agaricus bisporus) and several wild mushroom species.