Performance of the parasitoid Oomyzus sokolowskii (Hymenoptera: Eulophidae) on its host Plutella xylostella (Lepidoptera: Plutellidae) under laboratory conditions

  • Gallo SowEmail author
  • Laurence Arvanitakis
  • Saliou Niassy
  • Karamoko Diarra
  • Dominique Bordat
Research Paper


Oomyzus sokolowskii (Kurdjumov) is a gregarious larval-pupal parasitoid of the diamondback moth Plutella xylostella (L.). The objective of this study was to investigate the interactions between host and parasitoid by examining the effects of biotic factors such as gregariousness, host origin and stages, and female parasitoid age on the parasitism rate, developmental time, the number of offspring and the offspring sex ratio of O. sokolowskii under laboratory conditions. The percentage of parasitism and the number of parasitoids increased with the number of O. sokolowskii females. Oomyzus sokolowskii preferred fourth larval instars over other larval stages. The parasitism rate and the progeny production of O. sokolowskii decreased with parasitoid age; however, the developmental time and the sex ratio of the offspring were not significantly different. Our results confirm previous findings on larval preferences of O. sokolowskii. The study also confirmed the importance of geographical origin of the host on the performance of O. sokolowskii.

Key words

parasitoids Plutella xylostella cabbage rearing parasitism rate host stage biological control 


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Copyright information

© ICIPE 2013

Authors and Affiliations

  • Gallo Sow
    • 1
    Email author
  • Laurence Arvanitakis
    • 2
  • Saliou Niassy
    • 1
  • Karamoko Diarra
    • 1
  • Dominique Bordat
    • 2
  1. 1.Laboratoire de Parasitologie, Département de Biologie Animale, Faculté des Sciences et Techniques, Equipe Production et Protection Intégrées en Agroécosystèmes horticolesUniversité Cheikh Anta Diop de Dakar (UCAD)DakarSenegal
  2. 2.Laboratoire de Biodiversité des agrosystèmes horticoles TAB/LCampus international de Baillarguet, CIRADMontpellier Cedex 5France

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