Fusarium Poae (Peck) Wollenw. — Occurrence in maize ears, nivalenol production and mycotoxin accumulation in cobs

Abstract

Fusarium poae (Peck) Wollenw. occurred In maize ears with “pink rot” during 1985–1993 up to 18% of Fusarium isolates, with maximum frequency in 1990. Nivalenol and fusarenone X were produced under laboratory conditions by 13 out of 14 isolates up to 115 μg/g and 13.3 μg/g respectively. The same isolates produced diacetoxyscirpenol (DAS) up to 21.7 μg/g and 15-monoacetoxyscirpenol (MAS) up to 12.3 μg/g. However, In none of the strain cultures were T-2 toxin and HT-2 toxin detected. In samples of naturally Infected maize grain nivalenol was detected at levels of 1.8–32.5 μg/g and fusarenone X was not present. In corresponding axial stems were present both nivalenol (up to 13.5 μg/g) and fusarenone X (up to 2.4 μg/g).