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Abstract
Samples of Cyperus rotundus. Gmelina arborea, Hygrophila spinosa. Mesua ferrea and Solanum nigrum were collected from different storage centers of Bihar (India). The common mycoflora isolated were species of Alternaria. Aspergillus, Curvularia, Fusarium. Penicillium and Rhizopus. All the samples were analysed for natural aflatoxin contamination. Out of 37 samples screened 30 were found to be aflatoxin positive. Of 50 strains of Aspergillus flavus isolated from various samples, 21 were toxigenic and their potentiality to produce aflatoxin Bl was in the range of 0.09 to 0.65 μg/ml of culture filtrate.