International Journal of Industrial Entomology and Biomaterials

Korean Society of Sericultural Science (한국잠사학회)
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Influence of Host Age on Development and Morphological Parameters of the Parasitoid Nesolynx thymus Girault (Hymenoptera: Eulophidae), An Ecto-Pupal Parasitoid of the Uzi Fly, Exorista bombycis (Louis) (Diptera: Tachinidae)

  • Aruna A.S. (Department of Studies in Sericultural Science, University of Mysore) ;
  • Manjunath D. (Department of Studies in Sericultural Science, University of Mysore)
  • Published : 2006.03.01
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Abstract

The present investigation was conducted to know the effects of host age on development and morphological characteristics of Nesolynx thymus, a gregarious ectopupal parasitoid of the uzi fly, Exorista bombycis, a serious en do-larval parasitoid of the silkworm, Bombyx mori L. For experimentation, 3 - 11 day-old pupae of E. bombycis were exposed to 2 day-old adults of N. thymus at $25{\pm}2^{\circ}C\;and\;60{\pm}10%$ RH. A highly significant negative correlation between host age and the following development and morphological characteristics of the parasitoid was observed: number of pupae parasitised, total adult recovery, sex ratio and recovery, longevity, body length, wing span, abdomen length, and abdomen width of females. The findings of the present study clearly demonstrate that various development and morphological parameters of N. thymus are influenced by the age of E. bombycis pupae.

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References

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