• Contact Us
    • Send Feedback
    • Login
    View Item 
    •   Home
    • Journal and Journal Articles
    • Journal and Journal Articles
    • View Item
    •   Home
    • Journal and Journal Articles
    • Journal and Journal Articles
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    Whole Repository
    CollectionsIssue DateRegionCountryHubAffiliationAuthorsTitlesSubject
    This Sub-collection
    Issue DateRegionCountryHubAffiliationAuthorsTitlesSubject

    My Account

    Login

    Welcome to the International Institute of Tropical Agriculture Research Repository

    What would you like to view today?

    Experimental assessment of the impact of the introduced parasitoid Gyranusoidea tebygi Noyes on the mango mealbug Rastrococcus invadens Williams, by physical exclusion

    Thumbnail
    View/Open
    S95ArtBoavidaExperimentalInthomNodev.PDF (3.103Mb)
    Date
    1995-03
    Author
    Boavida, C.
    Neuenschwander, P.
    Herren, H.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    The parasitoid Gyranusoidea tebygi Noyes was released in West Africa against the mango mealybug, Rastrococcus invadens Williams, a pest that invaded Africa in the early 1980s. The ability of G. tebygi to control the mango mealybug was assessed in mango trees using paired sleeve cages. In sleeve cages left open to allow parasitoid attack, G. tebygi reduced mealybug levels 2.7-fold within 1.5 host generations, compared to the closed-sleeve treatment. A parasitism index of 34.4% was measured in the open-sleeve treatment. On leaves without sleeves, the parasitism index was a-fold higher, and the mealybug population level was two times lower than that in the open-sleeve treatment. The lower level of the mealybug population on uncaged leaves, compared to the one on leaves protected by open cages, is attributed to higher mortality caused both by parasitism and by abiotic factors such as rain and wind. The potential of G. tebygi to reduce mango mealybug populations is therefore assumed to be higher than the paired sleeve treatments suggest.
    https://doi.org/10.1006/bcon.1995.1011
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/1749
    Digital Object Identifier (DOI)
    https://doi.org/10.1006/bcon.1995.1011
    IITA Subjects
    Pests Of Plants
    Agrovoc Terms
    Experimental Design; Rastrococcus Invadens; Data Collection; Population Density; Gyranusoidea Tebygi; Biological Control; Impact Assessment; Exclusion Experiment
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Journals
    Biological Control
    Collections
    • Journal and Journal Articles5283
    copyright © 2019  IITASpace. All rights reserved.
    IITA | Open Access Repository