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Larval instars determination for Chilo partellus Swinhoe (Lepidoptera: Pyralidae) reared on sorghum

Published online by Cambridge University Press:  19 September 2011

Aliyageen M. Alghali
Aliyageen M. Alghali
Affiliation:
International Centre of Insect Physiology and Ecology (ICIPE), P.O. Box 30, Mbita, Kenya
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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.

Keywords

Chilo partelluslarval instarssorghumhead capsule widthChilo partellusphases larvairessorgholargeur de tête capoulaire
Type
Articles
Information
International Journal of Tropical Insect Science , Volume 6 , Issue 6 , December 1985 , pp. 677 - 679
Copyright
Copyright © ICIPE 1985

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References

Dyar, H. G. (1890) The number of moults of Lepidopterous larvae. Psyche, Camb. 5, 420–422.CrossRefGoogle 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.CrossRefGoogle 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.CrossRefGoogle Scholar
McNeil, J. N. (1978) The number of larval stages of Thymelicus lineola (Lepidoptera: Hesperiidae) in Eastern Canada. Can. Ent. 110, 1293–1295.CrossRefGoogle Scholar
Odebiyi, J. B. (1981) Studies on the biology of the cowpea pod borer, Maruca testulalis, in Kenya—1. Determination of larval instars. Insect Sci. 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
Scheltes, 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.CrossRefGoogle Scholar