Timing of releases of the parasitoid Habrobracon hebetor and numbers needed in augmentative biological control against the millet head miner Heliocheilus albipunctella

    Amadou, L and Ba, M N and Baoua, I and Muniappan, R (2019) Timing of releases of the parasitoid Habrobracon hebetor and numbers needed in augmentative biological control against the millet head miner Heliocheilus albipunctella. BioControl (TSI). pp. 1-9. ISSN 1386-6141

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    Abstract

    Heliocheilus albipunctella de Joannis (Lepidoptera: Noctuidae) is one of the major insect pests of pearl millet in the Sahel. The native parasitoid, Habrobracon hebetor Say (Hymenoptera: Braconidae), is currently being promoted for augmentative biological control of the pest in the Sahel. The current study was carried out to identify the right time for releases of the parasitoid using either pearl millet growing stage, or pest occurrence as reference, and to determine the optimal number of parasitoids needed to cover a given area. Our results indicate that release of parasitoids at the panicle emergence stage or six weeks after first sight of eggs of H. albipunctella lead to highest parasitism of H. albipunctella larvae by H. hebetor. The dose of 800 parasitoids for a distance of 3 km radius was enough for controlling H. albipunctella. The implications of the results are discussed toward cost effective and practical recommendation adapted to the Sahelian conditions.

    Item Type: Article
    Divisions: Research Program : West & Central Africa
    CRP: UNSPECIFIED
    Uncontrolled Keywords: Parasitism, Pearl millet, growing stage, Corcyra cephalonica, Niger, Sahel, Pearl millet
    Subjects: Mandate crops > Millets > Pearl Millet
    Others > Pest Management
    Others > Entomology
    Others > Niger
    Depositing User: Mr Ramesh K
    Date Deposited: 20 Aug 2019 06:51
    Last Modified: 20 Aug 2019 06:51
    URI: http://oar.icrisat.org/id/eprint/11254
    Official URL: https://doi.org/10.1007/s10526-019-09960-2
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: Funding for this research was provided by the United States Agency for International Development under Cooperative Agreement No. AID-OAA-A-13-00047 with the Kansas State University Feed the Future Collaborative Research on Sorghum and Millet Innovation Lab (SMIL). The project was implemented by ICRISAT and partner institutions (University Dan Dicko Dankoulo of Maradi, Virginia Polytechnic Institute and State University) as part of the CGIAR research Program on Dryland Cereals. The authors are thankful to Dr. Jaspreet Sidhu for her assistance in early stage of statistical analysis and to Nassirou Saidou, Laouali Karimoune, Mayaki Gaya, Souleymane Mamane, for their contribution in data collection. The authors are also grateful to farmers who graciously allow collecting data in their millet fields.
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