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    Developing pheromone traps and lures for Maruca vitrata in Benin, West Africa

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    U03ArtFandohanInfectionNothomDev.pdf (239.4Kb)
    Date
    2004
    Author
    Downham, M.C.A.
    Tamò, M.
    Hall, D.R.
    Datinon, B.
    Adetonah, S.
    Farman, D.I.
    Type
    Journal Article
    Journal Article
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    Abstract/Description
    In previous work successful trapping of the legume podborer, Maruca vitrata Fabricius (Lepidoptera: Pyralidae), was accomplished using a synthetic pheromone blend consisting of (E,E)-10,12-hexadecadienal, (E,E)-10,12-hexadecadienol, and (E)-10-hexadecenal in a 100 : 5 : 5 ratio. In the present work, experiments were conducted in cowpea fields in Benin to compare different trap designs, and other aspects of the lures. A water-trap made from a plastic jerry-can was found to be superior to commercial funnel- and sticky-trap designs, and 120 cm was the optimum height for captures. Generally, lures consisted of polyethylene vials containing 0.1 mg of pheromone. Results showed that shielding the lures from the adverse effects of sunlight with aluminium foil did not increase trap catches of M. vitrata. The degree of isomeric purity of the (E,E)-10,12-hexadecadienal and (E,E)-10,12-hexadecadienol blend components, in the range 73–99%, had no significant effect on captures, while lures of 80% isomeric purity showed no loss of effectiveness for up to 4 weeks. Similar results were observed with lures from a commercial source containing 0.46 mg of pheromone in the blend ratio 100 : 11 : 6 and 95% isomeric purity. Residue analysis showed that vial lures exposed for 2 weeks in the field still contained 73% of the initial amount of (E,E)-10,12-hexadecadienal, compared to rubber septa dispensers, which only retained 22%. Females comprised 11–50% of total catches, confirming earlier, unexpected results for synthetic lures. The observations that effective traps can be made from locally available plastic containers, and that pheromone blend composition and purity are not critical, should reduce costs and improve the feasibility of traps as practical monitoring tools for M. vitrata.
    https://doi.org/10.1111/j.0013-8703.2004.00128.x
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/4204
    Digital Object Identifier (DOI)
    https://doi.org/10.1111/j.0013-8703.2004.00128.x
    IITA Subjects
    Cowpea; Grain Legumes
    Agrovoc Terms
    Cowpeas; Vigna Unguiculata; Grain Legumes; Monitoring Techniques; Pyralidae; Lepidoptera
    Regions
    Africa; West Africa
    Countries
    Benin
    Collections
    • Journal and Journal Articles4835
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