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  • Title: Prevalence of Fusarium species of the Liseola section on Zimbabwean corn and their ability to produce the mycotoxins zearalenone, moniliformin and fumonisin B1.
    Author: Mubatanhema W, Moss MO, Frank MJ, Wilson DM.
    Journal: Mycopathologia; 1999 Dec; 148(3):157-63. PubMed ID: 11189767.
    Abstract:
    Maize samples were collected from nine Grain Marketing Board (G.M.B) centers in Zimbabwe during the 1991 harvest season. A further 47 samples collected directly from farmers and from the G.M.B., centers in Chinhoyi and Kwekwe during the 1992 harvest season. These samples were analyzed mycologically and the predominant flora was Fusarium although Penicillium, Nigrospora, Aspergillus and Chaetomium could be isolated from some samples. From the first nine samples studied, F. verticillioides and F. subglutinans were isolated in almost equal proportions on samples from the central and the south of the country whereas only F. verticillioides was isolated on the samples from the north. The subsequent study demonstrated that there was a greater fungal diversity in samples from North (Mashonaland West) than samples from the South (Midlands area) with species of Nigrospora, Chaetomium, Acremonium and Diplodia occurring in significant numbers. From a total of 2821 fungal isolates obtained from all the maize samples analyzed, 1485 (53%) were found to belong to the liseola section of Fusarium. The ability of these isolates to produce the mycotoxins zearalenone, moniliformin and fumonisin B1 was tested using a simplified TLC Agar plate method. Out of the 886 isolates tested, only one produced all the three mycotoxins simultaneously whilst most produced fumonisin B1 and/or moniliformin. Only nine isolates produced zearalenone.
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