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Abstract
Corn cultures (five isolates each of Fusarium graminearum Group 1 from wheat crowns, Group 2 from scabby wheat grains and from ear rot of corn and five isolates of F. crookwellense) were screened for their ability to produce deoxynivalenol (DON), nivalenol (NIV), fusarenon‐x (FUS‐X) and zearalenone (ZEA). Nine of the ten F. graminearum isolates from wheat produced DON (5–165 μg g−1) but none produced either NIV or FUS‐X. Conversely, 3/5 and 2/5 of the F. graminearum isolates from corn produced NIV (5–40 μg g−1) and FUS‐X (5–7/ μg g−1), respectively, while none produced DON. All but one of the F. graminearum isolates produced ZEA (2–1160 μg g−1). None of the F. crookwellense isolates produced DON, but 5/5 and 4/5 produced NIV (6–170 μg g−1) and FUS‐X (3–90 μg g−1), respectively, and all produced ZEA (605–1030 μg g−1). The results confirmed previous findings on the presence of two distinct F. graminearum chemotypes.
