Mycoflora and occurrence of aflatoxin B1 and fumonisin B2 during storage of Brazillian sorghum.
DASILVA, J.B., POZZI, C.R., MALLOZZI, M.A.B., ORTEGA, E.M. and CORREA, B.
Journal of Agricultural and Food Chemistry 48 4352-4356.
2000
บทคัดย่อ
In 140 sample of freshly harvested and stored sorghum in Brazil, the levels of aflatoxin and fumonisin contamination detected in the grains and the prevailing abiotic factors (grain moisture content, water activity, temperature, relative humidity and mean rainfall) at the time of sampling were investigated. The results show a predominance of the genera Phoma (57.1%), Aspergillus (42.7%), Fusarium (25.0%) and Rhizopus (21.4%). The species most frequently found were Aspergillus flavus and Fusarium moniliforme. Of the sample analysed, 12.8% were contaminated with aflatoxin B1 (concentration mean 7-33 mg/kg) and 74.2% were contaminated with fumonisin B1 (concentration mean 0.11-0.15 mg/g). This paper is the first report of the natural occurrence of aflatoxins and fumonisins in sorghum grain from Brazil.