Skip to main content
Log in

Larval Instars Determination for Chilo partellus Swinhoe (Lepidoptera: Pyralidae) Reared on Sorghum

  • Published:
International Journal of Tropical Insect Science Aims and scope Submit manuscript

Abstract

Larval instars of Chilo partellus Swinhoe reared on sorghum plants were determined. The larvae were separable into five non-overlapping instars by analysis of variance and Duncan’s multiple range test, frequency distribution and scatter diagram of the head capsule widths. Head capsule increment from one instar to the next conformed to Dyar’s rule, while at the same time agreeing with Richards’ hypothesis. The stadial periods for the five instars were 6, 4, 5, 3 and 7 days, respectively.

Résumé

Les phases morphologiques larvaires du Chilo partellus Swinhoe élevé sur des plantes de sorgho étaient déterminées. Les larves étaient séparées en cinq phases distinctes par analyse de la variance. Le test de champ multiple de Duncan. La distribution de fréquence et le diagramme de distribution des largeurs des têtes. Les augmentations de largeurs des têtes d’une phase à la phase suivante se conformaient à la loi de Dyar, et satisfaisaient aussi l’hypothèse de Richards. Les périodes de sifférentes phases étaient de 6, 4, 5, 3 et 7 jours, respectivement.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Dyar H. G. (1890) The number of moults of Lepidopterous larvae. Psyche, Camb. 5, 420–422.

    Article  Google Scholar 

  • Girling D. J. (1978) The distribution and biology of Eldana saccharina (Walker) and its relationship to other stemborers in Uganda. Bull. ent. Res. 63, 471–488.

    Article  Google Scholar 

  • Kishi Y. (1981) Reconsideration of the method to measure the larval instars by use of the frequency distribution of head capsule widths or lengths. Can. Ent. 103, 1011–1015.

    Article  Google Scholar 

  • McNeil J. N. (1978) The number of larval stages of Thymelicus lineola (Lepidoptera: Hesperiidae) in Eastern Canada. Can. Ent. 110, 1293–1295.

    Article  Google Scholar 

  • Odebiyi J. B. (1981) Studies on the biology of the cowpea pod borer, Maruca testulalis, in Kenya—1. Determination of larval instars. Insect Sei. Applic. 1, 339–341.

    Google Scholar 

  • Richards O. W. (1949) The relation between measurements of successive instars of insects. Proc. R. ent. Soc. Lond. A24, 8–10.

    Google Scholar 

  • Scheites P. (1978) Ecological and physiological aspects of aestivasion-diapause in the larvae of two pyralidae stalk borers of maize in Kenya. Mededeling no. 298 Laboratorium Voor Engomologie, Wegeningen, pp. 110.

    Google Scholar 

  • Young W. R. and Teetes G. L. (1977) Sorghum entomology. A. Rev. Ent. 22, 193–218.

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Alghali, A.M. Larval Instars Determination for Chilo partellus Swinhoe (Lepidoptera: Pyralidae) Reared on Sorghum. Int J Trop Insect Sci 6, 677–679 (1985). https://doi.org/10.1017/S1742758400002897

Download citation

  • Received:

  • Revised:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1017/S1742758400002897

Key Words

Mots Cléfs

Navigation