• 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?

    Bioecology of the cowpea pod weevil Piezotrachelus varius Wagner (Coleoptera: Curculionidae), and cowpea seed damage

    Thumbnail
    Date
    2006
    Author
    Ntonifor, N.
    Edimengo, P.
    Tamo, M.
    Type
    Journal Article
    Metadata
    Show full item record
    Abstract/Description
    The bioecology of the cowpea pod weevil, Piezotrachelus varius, and post-harvest seed losses were studied in the laboratory and in cowpea fields in the Western Highlands of Cameroon during the first and second cropping seasons of 1999 and 2000. Adult weevils appeared before flowering and fed on cowpea leaves and flowers before switching to newly formed pods. Pod-feeding produced holes on the pod wall mesocarp through which the female layed a cluster of 2-5 ovoid, semi-translucent eggs; the eggs hatched 3-4 days later. Three larval stages fed on the peas and pupated within the pod, usually near the damaged peas. Juveniles continued to feed in the mature harvested cowpea pods in storage; adults emerged up to two weeks after harvest. Development was completed within 16-17 days and the adults lived for more than five months. Post-harvest cowpea seed damage peaked two weeks after harvest. A number of hymenopterous parasitoids, Anisopteromalus calandrae Howard, Pteromalus sp. (Hymenoptera, Pteromalidae), Pediobius sp., Aprostocetus sp. (Hymenoptera, Eulophidae) and Bracon sp. (Hymenoptera, Braconidae) emerged from the pods. These were collected and appeared to be potential parasitoids of P. varius. During the off-season for cowpea, P. varius adults survived on cowpea haulm residue left in the field and on surrounding cultivated and indigenous alternate hosts. The implication of this bio-ecological information in the management of P. varius populations is discussed.
    http://hdl.handle.net/10520/EJC32657
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/5333
    Digital Object Identifier (DOI)
    http://hdl.handle.net/10520/EJC32657
    IITA Subjects
    Plant Ecology; Plant Diseases; Post-Harvesting Technology; Pests Of Plants; Cowpea
    Agrovoc Terms
    Cowpeas; Pods; Harvesting; Parasitoids
    Regions
    Africa; Acp; Southern Africa; North America; West Africa
    Countries
    South Africa; United States; Benin
    Collections
    • Journal and Journal Articles4835
    copyright © 2019  IITASpace. All rights reserved.
    IITA | Open Access Repository