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    Interaction between the aphid parasitoid Lysiphlebus testaceipes (Hymenoptera: Aphidiidae) and its hyperparasitoid Syrphophagus africanus (Hymenoptera: Encyrtidae)

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    S12ArtGanyoInteractionInthomDev.pdf (128.3Kb)
    Date
    2012
    Author
    Ganyo, K.K.
    Tounou, A.K.
    Agboton, C.
    Dannon, E.A.
    Pittendrigh, Barry R.
    Tamo, M.
    Type
    Journal Article
    Metadata
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    Abstract/Description
    The interactions between the cowpea aphid Aphis craccivora Koch, its parasitoid Lysiphlebus testaceipes Cresson and hyperparasitoid Syrphophagus africanus Gahan were assessed in the laboratory. Host age preference for hyperparasitism was evaluated using parasitized aphids of different ages (i.e. 1, 2, 3, 4, 5 and 6 days old and mixed ages). We studied the influence of the hyperparasitoid on the parasitism efficiency of L. testaceipes, the effect of host age on some biological parameters of S. africanus, and its hyperparasitism based on aggregated or isolated mummies. The presence of S. africanus significantly affected aphid parasitism by L. testaceipes (21.2 ^ 3.6 vs 36.6 ^ 4.5%). Except for 1-day-old hosts, S. africanus successfully parasitized hosts of all tested ages, with preference for newly formed mummies (39.16 ^ 3.31% parasitism in 5-day-old hosts). The development time of immature stages of the S. africanus progeny was significantly affected by host age. The sex ratio of the hyperparasitoid progeny was largely female biased and did not vary with host age. Syrphophagus africanus females from live parasitized aphids produced more offspring (36.55 ^ 6.28 vs 25.00 ^ 7.16) and lived longer (21.09 ^ 1.57 vs 10.88 ^ 2.31 days) than those from mummy hosts. Hyperparasitism rates were higher on aggregated mummies than on dispersed ones (36.00 ^ 2.86 vs 20.66 ^ 4.00%).
    https://dx.doi.org/10.1017/S1742758412000070
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/1409
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1017/S1742758412000070
    IITA Subjects
    Cowpea; Grain Legumes
    Agrovoc Terms
    Lysiphlebus; Hyperparasitism; Aphid; Aphis; Cowpeas
    Regions
    Africa; West Africa
    Countries
    Benin
    Journals
    International Journal of Tropical Insect Science
    Collections
    • Journal and Journal Articles4835
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