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    Population dynamics of Bemisia tabaci (Homoptera: Aleyrodidae) parasitoids on cassava mosaic disease resistant and susceptible varieties

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    Date
    2006
    Author
    Otim, M.
    Legg, D.J.
    Kyamanywa, S.
    Polaszek, A.
    Gerling, D.
    Type
    Journal Article
    Metadata
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    Abstract/Description
    Three field trials were conducted at Namulonge Agricultural and Animal Production Research Institute to investigate the population dynamics of Bemisia tabaci Gennadius and its associated aphelinid parasitoids in Uganda. Results showed that more whitefly occurred on the cassava mosaic disease-resistant variety, (Nase 4) compared to the susceptible variety, (Ebwanatereka). Two species of aphelinid parasitoids, Eretmocerus mundus Mercet and Encarsia sophia Girault and Dodd, were identified during the study. Overall percent parasitism did not differ significantly (P>0.05) between varieties in all the trials, but significant differences occurred at 13, 15 and 21 weeks after planting during late season (2000), 18 weeks after planting during early season (2001), and 8 weeks after planting during late season (2001). The trends in the build up in numbers of both parasitoids species and apparent parasitism were similar, differed significantly on certain dates. It was, however, noted that percent parasitism decreased with nymph number. The significance of this phenomenon on the potential use of these aphelinid parasitoids as biocontrol agents of the cassava whitefly is discussed.
    https://dx.doi.org/10.1080/09583150500335558
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/3091
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1080/09583150500335558
    IITA Subjects
    Diseases Control; Pests Of Plants; Plant Breeding; Livelihoods; Cassava; Plant Diseases; Plant Ecology; Plant Genetic Resources; Plant Health; Plant Production
    Agrovoc Terms
    Bemisia Tabaci; Biological Control; African Cassava Mosaic Virus; Encarsia Sophia; Eretmocerus Mundus; Population Dynamics; Aphelinid Parasitoids
    Regions
    Africa; Acp; Asia; East Africa; Europe; Middle East
    Countries
    Uganda; United Kingdom; Israel
    Collections
    • Journal and Journal Articles4835
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