Effect of climatic conditions on natural mycoflora and fumonisins in freshly harvested corn of the State of Parana, Brazil.
ONO, E.Y.S., SUGIURA, Y., HOMECHIN, M., KAMOGAE, M., VIZZONI,E UENO,Y. and HIROOKA, E.Y.
Mycopathologia 147:139-148.
1999
บทคัดย่อ
Natural mycoflora associated with fumonisins were analysed in 150 samples of freshly harvested corn from crntral-Southern, Central-western and Northern regions of the State if Parana, Brazil, and correlated to climatic conditions. The highest contamination with potentially mycotoxigenic fungioccurred in corn harvested in the Central-Western region where F. moniliforme was the predominant Fusarium species, and was isolated in 85.9%of the samples. FB1 was detected in 100% of the samples, (mean of 2.39 mg/kg) and FB2 in 97.7% (mean of 1.09 mg/kg). Fumonisins were also detected in all samples from Northern region, with mean concentrations of FB1 and FB2 of 4.56 and 2.20 mg/kg, respectively. Seventy-two percent of the corn samples from the Central-West and 92% from the North were contaminated with concentrations above 1 mg/kg, in Central-southern samples. The higher fumonisins contamination of corn from Northern region when compared to the Central-South is attributed to the differences in rainfall levels (92.8 mm in Central-Southern, 202 mm in Northern) during the month preceding harvest.