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    Does use of atoxigenic biocontrol products to mitigate aflatoxin in maize increase fumonisin content in grains?

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    Journal Article (133.8Kb)
    Date
    2021-09-07
    Author
    Ortega-Beltran, A.
    Agbetiameh, D.
    Atehnkeng, J.
    Falade, T.D.
    Bandyopadhyay, R.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    In the tropics and subtropics, maize and other crops are frequently contaminated with aflatoxins by Aspergillus flavus. Treatment of crops with atoxigenic isolates of A. flavus formulated into biocontrol products can significantly reduce aflatoxin contamination. Treated crops contain up to 100% less aflatoxins compared to untreated crops. However, there is the notion that protecting crops from aflatoxin contamination may result in increased accumulation of other toxins, particularly fumonisins produced by a few Fusarium species. The objective of this study was to determine if treatment of maize with aflatoxin biocontrol products increased fumonisin concentration and fumonisin-producing fungi in grains. Over 200 maize samples from fields treated with atoxigenic biocontrol products in Nigeria and Ghana were examined for fumonisin content and contrasted with maize from untreated fields. Apart from low aflatoxin levels, most treated maize also harbored fumonisin levels considered safe by the European Union (< 1 part per million). Most untreated maize also harbored equally low fumonisin levels but contained higher aflatoxin levels. In addition, during one year, we detected considerably less Fusarium spp. densities in treated maize than in untreated maize. Our results do not support the hypothesis that treating crops with atoxigenic isolates of A. flavus used in biocontrol formulations results in higher grain fumonisin levels.
    https://dx.doi.org/10.1094/pdis-07-20-1447-re
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7751
    IITA Authors ORCID
    Alejandro Ortega-Beltranhttps://orcid.org/0000-0003-3747-8094
    Titilayo Faladehttps://orcid.org/0000-0001-5562-7861
    Ranajit Bandyopadhyayhttps://orcid.org/0000-0003-2422-4298
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1094/pdis-07-20-1447-re
    Research Themes
    Plant Production and Health
    IITA Subjects
    Aflatoxin; Agronomy; Disease Control; Maize; Plant Breeding; Plant Health; Plant Production
    Agrovoc Terms
    Aflatoxins; Biological Control; Aspergillus Flavus; Fumonisins; Fusarium; Maize
    Regions
    Africa; West Africa
    Countries
    Ghana; Nigeria
    Hubs
    Headquarters and Western Africa Hub
    Journals
    Plant Disease
    Collections
    • Journal and Journal Articles4835
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