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    Occurrence and activity of Bemisia tabaci parasitoids on cassava in different agro-ecologies in Uganda

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    S05ArtOtimOccurrenceInthomNodev.pdf (255.2Kb)
    Date
    2005-02
    Author
    Otim, M.
    Legg, J.P.
    Kyamanywa, S.
    Polaszek, A.
    Gerling, D.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    Bemisia tabaci Gennadius (Homoptera: Aleyrodidae) is the vector of cassava mosaic geminiviruses that cause cassava mosaic disease (CMD), which in turn causes devastating yield losses. Surveys were conducted from October 2000 to November 2001 in four agro-ecologies in Uganda to enhance the understanding of parasitoid fauna and parasitism of B. tabaci in cassava fields. Such an understanding is an essential prerequisite for the development of biological control methods of B. tabaci to complement current CMD control practices. Parasitoid abundance and parasitism efficiency varied between locations and sampling dates within the locations; highest parasitoid densities were observed at Namulonge in the Lake Victoria crescent while the lowest was at Kalangala. In all locations, parasitism was mainly due to Encarsia sophia Dodd and Girault and Eretmocerus mundus Mercet (all Hymenoptera: Aphelinidae). Two occasionally observed species included Encarsia mineoi Viggiani (Hymenoptera: Aphelinidae), only observed at Namulonge, and blackhead Encarsia (Hymenoptera: Aphelinidae) observed at Bulisa, Namulonge and Lyantonde. Parasitism efficiency was highest at Bulisa (57.9%), but ranged from 40.2 to 46.9% at the other three sites. This paper discusses the possible causes of variations in parasitoid abundance and parasitism efficiency, and proposes further studies that might be carried out to assess the potential for augmentation of parasitoids to control B. tabacipopulations and CMD.
    https://dx.doi.org/10.1007/s10526-004-0822-4
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/4108
    Non-IITA Authors ORCID
    James Legghttps://orcid.org/0000-0003-4140-3757
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1007/s10526-004-0822-4
    IITA Subjects
    Cassava; Plant Diseases; Plant Health; Plant Production
    Agrovoc Terms
    Aleyrodidae; Bemisia Tabaci; Cassava; Encarsia; Eretmocerus Mundus; Homoptera; Parasitism
    Regions
    Africa; Central Africa
    Countries
    Uganda
    Journals
    Biocontrol
    Collections
    • Journal and Journal Articles4835
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