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    Functional response of the predators Alloeocranum biannulipes (Hemiptera: reduviidae) and Teretrius nigrescens (Coleoptera: histeridae) feeding on Dinoderus porcellus (Coleoptera: bostrichidae) infesting yam chips

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    S17ArtLokoFunctionalInthomDev.pdf (281.2Kb)
    Date
    2017-02-08
    Author
    Loko, Y.L.
    Djagoun, A.D.
    Dannon, E.A.
    Datinon, B.
    Dansi, A.
    Thomas-Odjo, A.A.
    Tamo, M.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    The functional response and some predation parameters of the predators Alloeocranum biannulipes Montrouzier & Signoret (Hemiptera: Reduviidea) and Teretrius nigrescens Lewis (Coleoptera: Histeridae) were evaluated at five different densities of larvae and pupae of Dinoderus porcellus Lesne (Coleoptera: Bostrichidae) with the aim to understand their roles in the biological control of this major pest of stored yam chips. Experiments were performed in petri dishes at 25 ± 1 °C, 60 ± 10% RH, and a photoperiod of 12:12 (L:D) h in a controlled temperature room. Both predators showed Type II of functional response with respect to larvae, determined by a logistic regression model. However, T. nigrescens significantly killed more larvae of D. porcellus compared with A. biannulipes. This behavior, however, changed to a linear functional response (Type I), when pupae of D. porcellus were offered to both predators, possibly because of their immobility. In addition, there was no significant difference between T. nigrescens and A. biannulipes in terms of the killed pupae. Parameters of the Holling disc equation for both predators were estimated. Estimated handling time on larvae of D. porcellus for T. nigrescens and A. biannulipes was 0.254 and 0.677 h and the rate of searching efficiency was 0.289 and 0.348 h−1, respectively. Results indicated that T. nigrescens was a more suitable candidate for augmentative release for D. porcellus control than A. biannulipes. However, semifield studies are required to draw firm conclusions.
    https://doi.org/10.1093/ee/nvw156
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/1599
    Digital Object Identifier (DOI)
    https://doi.org/10.1093/ee/nvw156
    IITA Subjects
    Pests Of Plants; Post-Harvesting Technology; Yam
    Agrovoc Terms
    Predation; Yams; Alloeocranum Biannulipes; Dinoderus Porcellus; Functional Response; Teretrius Nigrescen
    Regions
    Africa; West Africa
    Countries
    Benin
    Journals
    Environmental Entomology
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    • Journal and Journal Articles4835
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