Abstract
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, Pyricularia, 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.