Production of trichothecenes and zearalenone by Fusarium species isolated from wheat.

Fusaria isolates from wheat were tested for ability to produce trichothecenes and zearalenone. Four isolates of F. culmorum out of 13 produced vomitoxin (DON) and 3 Ac-DON, one produced diacetoxysirpenol and 12 zearalenone. Particularly high yield of zearalenone was observed in cultures of sever pathogenic isolates. Higher temperature (20 degrees C) during first week of incubation favoured yield of zearalenone. About 50% of zearalenone was produced by surface mycelium.