Abstract
Different strains of the same species ofF. tricinctum produce the same toxic metabolites (butenolide and scirpenol). Two different species ofFusarium(F. tricinctum andF. equiseti) can produce the same butenolide and the same or similar scirpenols. Further, the same strain can produce three different toxic entities on certain media, and their presence or relative amounts can vary with substrate and conditions. Also, certain toxic metabolites of these strains are phytotoxic as well as toxic to mammals. Whether or not these toxic materials are associated with fescue foot of cattle is currently being investigated.
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