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Studies on the biology of the cowpea pod-borer, Maruca testulalis in Kenya—I. Determination of the larval instars

Published online by Cambridge University Press:  19 September 2011

J. B. Odebiyi
J. B. Odebiyi
Affiliation:
International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya
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Abstract

The head capsule widths of larvae of the cowpea pod-borer Maruca testulalis, reared individually and crowded together in the laboratory were measured. The measurements were subjected to a test of analysis of variance, frequency distribution and Dyar's rule. All methods gave a total of five larval instars in the life cycle and conformed to Dyar's rule. There was a high positive correlation (r = 0.97) between the size of the head capsule and the period of development elapsing. The minimum duration of larval development was 9 days.

Keywords

Dyar's rulegeometric progressionlarvals instarshead capsulefrequency distribution
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 1 , Issue 4 , December 1981 , pp. 339 - 341
Copyright
Copyright © ICIPE 1981

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References

REFERENCES

Dyar, H. G. (1890) The number of moults of lepidopterous larval. Psyche, Camb. 5, 420–422.CrossRefGoogle Scholar
Harris, J. W. E. and Coppel, H. C. (1967) The poplar and willow borer, Sternochetus lapathis (Coleoptera: Curculionidae) in British Columbia. Can. Ent. 99(4), 411–418.CrossRefGoogle Scholar
Inoue, M. (1964) On the life history of Cryptorrhychus lapathi Linne in Hokkaido. J. Jap. For. Soc. 46(6), 220–225.Google Scholar
Kishi, Y. (1971) Reconsideration of the method to measure the larval instars by use of the frequency distribution of head capsule widths or lengths. Can. Entom. 103, 1011–1015.CrossRefGoogle Scholar
Kozima, K. and Katagiri, K. (1964) On the larval instars and changes of its composition of Monochamus alternatus Hope. J. Jap. For. Soc. 46(9), 307–310.Google Scholar
Reid, R. W. (1955) The bark beetle complex associated with lodgepole pine slash in Alberta—I. Notes on the biologies of some Scolytidae attacking lodgepole pine slash. Can. Ent. 87(6), 311–323.CrossRefGoogle Scholar
Richards, O. W. (1949) The relation between measurements of successive instars of insects. Proc. R. ent. Soc. Lond. A 24, 8–10.Google Scholar
Shah, K. M. (1978) Biology of Maruca testulalis Geyer (Lepid: Pyralidae) bean pod borer. Plant Protection: B. Agr. Set Project, Faculty of Agriculture, Universiti Pertanian Malaysia (unpubl. report).Google Scholar
Taylor, T. A. (1967) The bionomics of Maruca testulalis Gey. (Lepidoptera: Pyralidae), a major pest of cowpeas in Nigeria. J. West Afr. Sc. Assoc. 12(2), 111–129.Google Scholar
Walters, J. and Mcmullen, L. H. (1956) Life history and habits of Pseudohylesinus nebulosus (LeConte) (Coleoptera: Scolytidae) in the interior of British Columbia. Can. Ent. 88, 197–202.CrossRefGoogle Scholar