• Login
    • Login
    Advanced Search
    View Item 
    •   EACIR Home
    • 2. EAC Institutions
    • Lake Victoria Basin Commission (LVBC)
    • LVBC Programmes and Projects
    • Lake Victoria Environmental Management Project Phase I (LVEMP I)
    • View Item
    •   EACIR Home
    • 2. EAC Institutions
    • Lake Victoria Basin Commission (LVBC)
    • LVBC Programmes and Projects
    • Lake Victoria Environmental Management Project Phase I (LVEMP I)
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Water Hyacinth Infestation in Ponds and Satellite Lakes in the Lake Victoria Basin on Tanzania: Status and Efforts to Manage it.

    Thumbnail
    View/Open
    Water hyacinth infestation in ponds and satelite in the Lake Victoria Basin on Tanzania - status and efforts to manage it.pdf (182.2Kb)
    Author
    Ndunguru, J
    Mjema, P
    Rajabu, CA
    Katagira, F
    Date
    2001
    Type
    Article
    Item Usage Stats
    363
    views
    321
    downloads
    Metadata
    Show full item record
    xmlui.dri2xhtml.METS-1.0.item-citation

    Water Hyacinth Infestation in Ponds and Satellite Lakes in the Lake Victoria Basin on Tanzania: Status and Efforts to Manage it. 1Ndunguru J.,1Mjema P., 1Rajabu C.A and 2Katagira F. 1Plant Protection Division, Box 1484, Mwanza, Tanzania, Tel: 255-28-2500458 2Plant Protection Division, Box 9071, Dar es Salaam

    Abstract/Overview

    A survey was conducted in ponds and satellite lakes in the lake Victoria basin in March 2000 to ascertain the presence of water hyacinth and its effect to the communities and the environment. Out of 14 (12 ponds and 2 satellite lakes) surveyed, water hyacinth was found in 11 ponds (i.e. 91.7% of ponds) and there was no water hyacinth in the satellite lakes under study. The highest (31.5 ha) infestation was recorded at Ngulyati pond in Bariadi, Shinyanga followed by Bukabwa (8 ha). No water hyacinth was found at Sarawe pond, Itabagumba and Buswahili satellite lakes. Plant population varied significantly (P< 0.001) with the highest (196 plants/0.25m2) recorded at Bukabwa and the lowest (21/0.25m2) at Bunda ponds. The immediate effect of the water hyacinth infestation in the ponds included difficulty in accessing water for domestic use owing to the extensive water hyacinth mats and loss of water through evapotranspiration. In the efforts to control the weed, water hyacinth weevils’ Neochetina eichhorniae and N. bruchi were released in 7 of them (9,600 adult weevils in 5 ponds at Mwanza Prison Center and 44,000 and 52,600 at Bukabwa and Ngulyati ponds respectively) which have established and multiplied to a level of up to 8 weevils per plant causing feeding scars of 38.65 on average at Ngulyati. Weed population decreased significantly (P<0.05) owing to the insect-induced stress. Other dominant aquatic weed species found growing in the ponds included Ceratophylum dermesum, Pistia stateotes, Rapa natas and Brasenia SP at Buswahili Satellite Lake and Cyperus spp and Justicia spp in the rest of the ponds and Satellite Lake. The presence of water hyacinth in the ponds and satellite lakes has partly contributed to water hyacinth regrowth (resurgence) in lake Victoria and other water bodies in the lake basin. Therefore management strategies of water hyacinth in Lake Victoria should also include ponds and satellite lakes.

    Subject
    Ponds; Satellite lake; Water hyacinth; Infestation
    Publisher
    Lake Victoria Environmental Management Project (LVEMP)
    Permalink
    http://hdl.handle.net/11671/825
    Collections
    • Lake Victoria Environmental Management Project Phase I (LVEMP I) [112]


    Contact Us | Usage Policies
     
    Languages
    Related Links
    EACIR PortalEAC Reports DatabaseEBSCO DatabaseEAC IRC Catalogue

    Browse

    All of EACIRBrowse CollectionsBy Issue DateAuthorsTitlesSubjectsTypeThis CollectionBy Issue DateAuthorsTitlesSubjectsType

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Contact Us | Usage Policies