International Journal of Tropical Insect Science

, Volume 2, Issue 4, pp 209–212 | Cite as

Life-Tables and Intrinsic Rate of Natural Increase of Xanthopimpla Stemmator Thunberg (Hymenoptera:Ichneumonidae) Population On Chilo Partellus Pupae

  • P. K. Nikam
  • C. D. Basarkar


The pupal parasitoid Xanthopimpia stemmator Thunberg oviposits in the pupae of the spotted stalk borer (or sorghum stem borer) Chilo partellus (Swin). The adult parasitoid emerges from the pupal case, killing it in the process. Ten mated females of the parasitoid had an average longevity of 30 days (maximum 37 days and minimum 22 days). The number of progeny produced ranged from 71 to 115, with an average of 84.5. The male:female sex-ratio of their progeny averaged 1.14:1. The maximum mean progeny production per day (mx) was 1.9. The innate capacity for increase was 0.131 per female per day; and the population multiplied 43.43 times in the generation time of 28.78 days.

Key Words

Xanthopimpia stemmator Chilo partellus progeny intrinsic rate of natural increase 


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Copyright information

© ICIPE 1982

Authors and Affiliations

  • P. K. Nikam
    • 1
  • C. D. Basarkar
    • 1
  1. 1.Department of ZoologyMarathwada UniversityAurangabadIndia

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