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An Antibiotic Lethal to Fungi. G. D. Lindberg, Professor, Department of Plant Pathology and Crop Physiology, Louisiana Agricultural Experiment Station, Louisiana State University, Baton Rouge 70803. Plant Dis. 65:680-683. Accepted for publication 10 December 1980 . Copyright 1981 American Phytopathological Society. DOI: 10.1094/PD-65-680.

An antibiotic produced by Pseudomonas sp. and identified as tropolone was lethal to established colonies of many fungi, including plant parasitic species of Helminthosporium, Alternaria, Fusarium, Diplodia, Piricularia, Cladosporium, Rhizoctonia, and Pythium and human parasitic Trichophyton mentagrophytes and T. rubrum. It was also lethal to an actinomycete, a yeastlike Capnodium, and a Mycobacterium. Polyene and other antifungal antibiotics, the antifungal activity of Bacillus uniflagellatus, and several chemical fungicides were strongly inhibitory but not lethal to the fungi tested.