Abstract
A life-table was constructed for a little known aphidiid waspLysiphlebia mirzai, a parasitoid of cereal aphid,Rhopalosiphum maidis. The female parasitoid survived 6.4 ± 1.17 (SD) days and oviposited intensively 4.0 ± 0.47 days. The total fecundity rate, Rt, was 169.2 ± 6.94 mummies/female and net reproductive rate, Ro, was 92.70 female offspring/female. The intrinsic total fecundity rate, rt, and intrinsic rate of natural increase, rm, the finite rate of total fecundity, λt, and finite rate of increase, λm, was 0.27048, 0.24155, 1.31059 and 1.27322 respectively. The mean generation time (18.75 days) and doubling time of the population (2.87 days) was slightly higher than other aphidiids studied so far. The proportion of female progenies decreased significantly on the successive oviposition days.
Résumé
Une table de vie a été constituée pour l'hyménoptère aphidiide peu connu,Lysiphlebia mirzai, parasitoïde du puceron des céréalesRhopalosiphum maidis. La femelle de parasitoïde survivait 6,4 ± 1,17 (S.D.) jours et pondait intensivement durant 4 ± 0,47 jours. Le taux de fécondité totale, Rt, était de 19,2 ± 6,94 momies/♀ et le taux net de reproduction, Ro, était de 92,70 descendants femelles/♀. Le taux intrinsèque de fécondité totale, rt, et le taux intrinsèque d'accroissement naturel, rm, le taux de fécondité totale, λt, et le taux d'accroissement λm étaient 0,27048, 0,24155, 1,31059 et 1,27322. La durée moyenne d'une génération (18,75 jours) et le doublement de la durée de la population (2,87 jours) étaient légèrement plus élevés que chez d'autres aphidiides étudiés jusqu'alors. La proportion de descendants ♀ décroissait significativement suivant les jours successifs de ponte.
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Tripathi, R.N., Singh, R. Fecundity, reproductive rate, longevity, and intrinsic rate of increase of an aphidiid parasitoidLysiphlebia mirzai . Entomophaga 35, 601–610 (1990). https://doi.org/10.1007/BF02375094
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DOI: https://doi.org/10.1007/BF02375094