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Some Observations on Chilo partellus (Lepidoptera: Pyralidae) Developmental Biology under Field and Laboratory Conditions

Published online by Cambridge University Press:  19 September 2011

J. K. O. Ampofo
J. K. O. Ampofo
Affiliation:
International Centre of Insect Physiology and Ecology (ICIPE), P.O. Box 30772, Nairobi, Kenya
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Abstract

Observations on the growth and development of Chilo partellus (Swinhoe) larvae under laboratory and field conditions indicate sexual dimorphism as well as a general developmental polymorphism. Larvae of both sexes went through fifth, sixth or seventh instars before pupation. The mean developmental period, larval head capsule width, and the number of instars before pupation as well as pupal weight were higher in the female compared to the male larvae. These observations suggest differences in the physiological state of fifth-instar larvae in a population; some of them might be in the penultimate, while others might be in the ultimate instar.

Résumé

Les observations faites sur le developpement des larves du Chilo partellus (Swinhoe) ont montrés un dimorphisme sexuel ain si qui un developpement polymorphisme general. Les larves de deux sexes ont traversés le stage larvaire 5, 6 ou 7 avant la pupation. La durée moyenne du developpement de la largeur de la tête des larves le nombre des stages larvaires avant la pupation et le poids des pupes etaient plus eleves chez les femelles que ches mals. Les observations montrent des differences sur l'etat physiologique des larves du 5eme stage larvaire de la population; certaines de ces differences sont dues au stage larvaire pénultieme et les autres au stage larvaire ultime.

Keywords

Chilo partelluslarval instarssexual dimorphismdevelopmental polymorphismhead capsuleChilo partellusstage larvairesdimorphisme sexuelpolymorphisme developpementlargeur de la tête
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 9 , Issue 2 , April 1988 , pp. 271 - 274
Copyright
Copyright © ICIPE 1988

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References

REFERENCES

Caltagirone, L. E. W. Getz and Meals, D. W. (1983) Head capsule width as an index of age in larvae of navel orangeworm, Amyelois Iransitella (Lepidoptera: Pyralidae) Environ. Ent. 12, 219–221.Google Scholar
Dyar, H. G. (1890) The number of molts of lepidoptera larvae. Psyche 5, 420–422.CrossRefGoogle Scholar
Fox, R. C., Anderson, N. H., Garner, S. C. and Walker, A. I. (1972) Larval head-capsules of the Nantucket pine tip moth. Ann. Ent. Soc. Am. 65, 513–514.Google Scholar
Guthrie, W. D. (1981) Maize whorl stage resistance to the first four instars of European corn borer larvae (Lepidoptera: Pyralidae). J. Kansas Ent. Soc. 54, 737–740.Google Scholar
Lees, E. and Tilley, R. J. D. (1980) Influence of photoperiod and temperature on larval development in Parage aegeria (L) (Lepidoptera:Satyridae). Ent. Gaz. 31, 3–6.Google Scholar
Mathez, F. C. (1972) Chilo partellus, Swinh., C. orichalcociliella, Strand. (Lep. Crambidae) and Sesamia calamistis Hmps. (Lep. Noctuidae) on maize in the Coast Province, Kenya. Mitt. Schweiz. Ent. Ges. 45, 167–189.Google Scholar
McGugan, B. M. (1954) Needle-mining habits and larval instars of the spruce budworm. Can. Ent. 86, 439–54.Google Scholar
Richards, O. W. C. (1949) The relation between measurement of the successive instars of insects. Proc. R. Ent. Soc. London Series A 24, 8–10.Google Scholar
Scheltes, P. (1978) Ecological and physiological aspects of aestivation diapause in the larvae of two Pyralid stalk borers of maize in Kenya. Ph.D. dissertation, Landbouwhogeschool, Wageningen, The Netherlands.Google Scholar
Schmidt, F. H., Campbell, R. K. and Trotter, S. J. Jr (1977) Errors in determining instar numbers through head capsule measurements of a lepidoteran—a laboratory study and critique. Ann. Ent. Soc. Am. 70, 750–756.Google Scholar
Shour, M. H. and Sparks, T. C. (1981) Biology of the soybean looper, Pseudoplusia includens: Characterization of last-stage larva. Ann. Ent. Soc. Am. 74, 531–535.Google Scholar
Stairs, G. R. (1965) Quantitative differences in susceptibility to nuclear-polyhedrosis virus among larval instars of the forest tent caterpillar, Malacosoma distria (Hubner). J. Invertebr. Pathol. 7, 427–429.Google Scholar
Van Rensburg, N. J. and Hamburg, H. van (1975) Grain sorghum pests: An integrated control approach. Proceedings of the First Congress of the Entomological Society of Southern Africa, pp. 151–162.Google Scholar
Verma, K. K. and Jotwani, M. G. (1983) Life processes of the stem borer Chilo partellus Swinhoe of different agro-climatic areas. Indian J. Ent. 45, 477–478.Google Scholar
Wada, T. (1979) Influence of temperature and the growing stage of the rice plant on the number of larval instars in the rice leaf roller, Cnaphalocrocis medinalis Guenee. Jap. J. Appl. Ent. Zool. 23, 178–182.Google Scholar