Abstract
Mycotoxigenic fungi isolated from corn, sorghum grains and peanut kernels were identified. Nine fungal species belonging to three genera were recovered from the tested samples. With the exception of the sorghum isolate, all tested Aspergillus flavus isolates were capable of producing variable amounts of G1 and B1 aflatoxin ranging from 1-6 parts per billion (ppb). The highest amount of aflatoxin B1 (8ppb) was produced by A. flavus isolated from corn grains. The sorghum isolate of Penicillium oxalicum was the highest producer of citreoviridin (37ppb). Fusarium subglutinans isolate recovered from popcorn was capable of producing fumonisin B1, zearalenone and vomitoxin (DON). Corn isolate of Fusarium proliferatum however, failed to produce fumonisin B1 and sorghum isolate of Fusarium verticillioides produced only fumonisin B1. The antifungal activity of yellow liquid fraction of Aloe vera against toxigenic fungi was tested. All tested concentrations were effective in inhibiting fungal growth.