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    Distribution and diversity of alternate hosts of Maruca vitrata Fabricius in three west African countries

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    Journal Article (794.6Kb)
    Date
    2021
    Author
    Addae, P.C.
    Bruce, Y.A.
    Utono, I.M.
    Abudulai, M.
    Traore, F.
    Ishiyaku, F.S.
    Adamu, R.S.
    Seldu, A.
    Batieno, B.J.
    Nwankwo, O.F.
    Ba, M.N.
    Adazebra, G.A.
    Tignegre, J.B.
    Dabire, C.
    Huesing, J.
    Hellmich, R.L.
    Pittendrigh, B.R.
    Tamo, M.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    The evolution of resistance to the Bacillus thuringiensis (Bt) toxins by insect pests is a major threat to Bt technology. However, the rate of resistance can be slowed with appropriate integrated insect resistance management (IRM) strategies. Surveys were conducted to identify alternate host species for Maruca vitrata (commonly called the legume pod borer or Maruca) that could serve as refuges for Pod-Borer Resistant (PBR) cowpea in three West African countries (Ghana, Nigeria, and Burkina Faso). Survey sites included 25 in northern Ghana, 44 in northern Nigeria, and 52 in north-central and southwestern Burkina Faso. Alternate hosts of Maruca identified from plant species belonging to the Fabaceae family that showed signs of Maruca damage on cowpea tissues were collected and dissected. Larvae that were found during these dissections were reared to adult moths in the laboratory then identified to species. The alternate host plants including species of Crotolaria, Sesbania, Tephrosia, and Vigna were the most frequently encountered among sites and locations. Flowering and podding of these plants overlapped with flowering and podding of the nearby (~200 m) cowpea crop. Abundance of these wild hosts and overlapping flowering patterns with the cowpea crop in most locations have the potential to sustain ample numbers of Bt susceptible Maruca that will mate with possible resistant Maruca and deter resistance development. Further quantitative studies, however, are required from each location to determine if actual Maruca production from alternate hosts is sufficient for a PBR IRM strategy. If verified, this approach would be compatible with the high dose/refuge IRM strategy that includes alternate hosts and non-Bt crops as refuges.
    Acknowledgements
    The authors are thankful to the United States Agency For International Development (USAID; AID-OAA-A-14-00035), the African Agricultural Technology Foundation (AATF), the Institute of Agricultural Research (IAR) in Nigeria, Institut de l’Environnement et de Recherché Agricoles (INERA) in Burkina Faso, and the Savana Agricultural Research Institute (SARI) in Ghana for providing funds and support for the Podborer Resistant Cowpea project. We are grateful to Hamza Adamu of IAR, Herve Bama at INERA ...
    https://dx.doi.org/10.1007/s42690-021-00470-2
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7132
    IITA Authors ORCID
    Manuele Tamòhttps://orcid.org/0000-0002-5863-7421
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1007/s42690-021-00470-2
    Research Themes
    Plant Production and Health
    IITA Subjects
    Agronomy; Cowpea; Grain Legumes; Pests of Plants; Plant Breeding; Plant Diseases; Plant Health; Plant Production; Smallholder Farmers
    Agrovoc Terms
    Pest Management; Cowpeas; Pests of Plants; Bacillus Thuringiensis; Fabaceae; Subsaharan Africa
    Regions
    Africa; West Africa
    Countries
    Burkina Faso (Upper Volta); Ghana; Nigeria
    Hubs
    Headquarters and Western Africa Hub
    Journals
    International Journal of Tropical Insect Science
    Collections
    • Journal and Journal Articles4842
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