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    Evaluation of atoxigenic isolates of Aspergillus flavus as potential biocontrol agents for aflatoxin in maize

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    atehnkeng-evaluation-2008.pdf (232.0Kb)
    Date
    2008
    Author
    Atehnkeng, J.
    Ojiambo, P.S.
    Ikotun, T.
    Sikora, R.A.
    Cotty, P.J.
    Bandyopadhyay, Ranajit
    Type
    Journal Article
    Metadata
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    Abstract/Description
    Aflatoxin contamination resulting from maize infection by Aspergillus flavus is both an economic and a public health concern. Therefore, strategies for controlling aflatoxin contamination in maize are being investigated. The abilities of eleven naturally occurring atoxigenic isolates in Nigeria to reduce aflatoxin contamination in maize were evaluated in grain competition experiments and in field studies during the 2005 and 2006 growing seasons. Treatments consisted of inoculation of either grains in vials or ears at mid-silking stage in field plots, with the toxigenic isolate (La3228) or atoxigenic isolate alone and co-inoculation of each atoxigenic isolate and La3328. Aflatoxin B1þB2 concentrations were significantly (p50.05) lower in the co-inoculation treatments compared with the treatment in which the aflatoxin-producing isolate La3228 was inoculated alone. Relative levels of aflatoxin B1þB2 reduction ranged from 70.1% to 99.9%. Among the atoxigenics, two isolates from Lafia, La3279 and La3303, were most effective at reducing aflatoxin B1þB2 concentrations in both laboratory and field trials. These two isolates have potential value as agents for the biocontrol of aflatoxin contamination in maize. Because these isolates are endemic to West Africa, they are both more likely than introduced isolates to be well adapted to West African environments and to meet regulatory concerns over their use throughout that region.
    https://dx.doi.org/10.1080/02652030802112635
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/2832
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1080/02652030802112635
    IITA Subjects
    Plant Production; Plant Genetic Resources; Aflatoxin; Food Security; Handling, Transport, Storage And Protection Of Agricultural Products; Livelihoods; Disease Control; Crop Husbandry; Plant Diseases; Pests Of Plants
    Agrovoc Terms
    Aflatoxin Contamination; Corn; Mycotoxin; Competitive Exclusion; Atoxigenic; Co-Inoculation
    Regions
    Africa; Acp; West Africa; North America; Europe
    Countries
    Nigeria; United States; Germany
    Collections
    • Journal and Journal Articles4835
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