Nine0 samples of maize, chick-peas andgroundnut seeds collected from the Egyptian market were found to be heavily contaminated by molds. Alternaria, Aspergillus, Cladosporium, Eurotium, Fusarium, Mucor, Penicillium and Rhizopus were the most common fungal genera isolated from nondisinfected seeds. Aspergillus alutaceus, A. flavus. Fusarium venicillioides and F. oxysporum were isolated from all suvace-disinfected seeds and were reported to produce ochratoxin A, aflatoxin B, and zearalenone, respectively. Irradiation at a dose 4.0 kGy reduced the mold growth greatly relative to unirradiated controls. There was no growth at dose 5.0 kGy. On the basis of the radiation survival data, the decimal reduction values D,, for A. alutaceus, A. flavus and F. verticilliodies were 0.70. 2.10 and 0.93 kGy in maize. A dose of 5 kGy inhibited the toxigenic molds and mycotoxin formation in see&. Aflatoxin B, and ochratoxin A were detected in maize and chick-peas, whereas zearalenone was detected in maize samples. Application of radiation af a dose of 6.0 kGy detoxified aflatoxin B, by 74.3-76.7%. ochratoxin A by 51.3-96.2% and zearalenone by about 78%.
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