Feed refusal factors in pure cultures of Fusarium roseum 'graminearum'.

摘要: Isolations from 1972 Wisconsin feed refusal corn yielded predominantly cultures of Fusarium roseum ”graminearum.” With one possible exception, none the selected isolates this fungus induced emesis in pigeons, whereas six nine produced responses all test animals. A single isolate F. ”equiseti” also a severe response and possibly slight emesis. None other fungi isolated (F. moniliforme, Acremoniella atra) or controls caused either refusal. Zearalenone was detected shown to be partially responsible for activity. The remaining activity ascribed more nonvolatile, neutral, relatively polar molecules. T-2 toxin, although not these isolates, have dramatic rats.