Life tables and intrinsic rate of natural increase ofPediobius furvus [Hym.: Eulophidae] onChilo partellus [Lep.: Pyralidae] |
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Authors: | G W Oloo |
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Institution: | (1) International Centre of Insect Physiology and Ecology (ICIPE), P.O. Box 30772, Nairobi, Kenya |
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Abstract: | In the present studies, life table data and intrinsic rate of natural increase (rm) of the eulophid pupal parasitoid,P. furvus (Gahan) were obtained fromChilo partellus (Swinhoe) at a constant temperature of 26.7±0.6°C, 52.3±2.7% RH in the laboratory. Development of immature stages took 19.1±0.3
days; adult females lived for 7.9±3.3 (range, 2–13) days and produced a mean of 91.9±22.4 progeny per female, with a sex ratio
of 1:2.9 (♂:♀). The intrinsic rate of natural increase (rm) was 0.2558/female/day; the net reproductive rate (R0), 237.25; the capacity for increase (rc) of 0.252; and the finite rate of increase (λ) of 1.29/female/day; thus, each female contributed 231.42 individuals to the
population in a mean generation time of 21.38 days.
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Keywords: | Pediobius furvus life tables net reproductive rate capacity for increase finite rate of increase intrinsic rate of natural increase |
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