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Interspecies interference of oviposition behaviour in the cowpea weevils Callosobruchus rhodesianus (Pic) and Callosobruchus maculatus (F.)

Published online by Cambridge University Press:  19 September 2011

D. P. Giga  and
J. Canhão
D. P. Giga
Affiliation:
Department of Crop Science, University of Zimbabwe, P. O. Box MP167, Harare, Zimbabwe
J. Canhão
Affiliation:
Department of Crop Science, University of Zimbabwe, P. O. Box MP167, Harare, Zimbabwe
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Abstract

The total number of eggs laid by Callosobruchus rhodesianus (Pic.) and Callosobruchus maculatus (F.) females in the presence of single and mixed species populations of males at different densities were counted. Increasing male density significantly reduced the realised fecundity of C. maculatus but not C. rhodesianus females. In the presence of C. maculatus males, however, the number of eggs laid by C. rhodesianus was greatly reduced. The reduction in egg laying and observations on mating behaviour indicates direct physical interference between weevils and competition for mates. An adequate number of beans were provided so competition for oviposition sites by females was unlikely. The ability of C. maculatus to inhibit oviposition of C. rhodesianus is suggested as one reason for its superiority over the latter when the two species compete for limited resources.

Résumé

Le nombre d'oeufs pondus par Callosobruchus rhodesianus (Pic.) et Callosobruchus maculatus (F.) en présence de différentes densitées de males d'espèces unique ou mixtes fûrent compté. L'augmentation des densitées de males ont réduit de façon significative la fécondité réalisée de C. maculatus mais non celle de C. rhodesianus. Par contre en présence de males de l'espéce C. maculatus, le nombre d'oeufs pondus par C. rhodesianus fût grandement réduit. La réduction d'oeufs pondus inique une interférence physique directe entre les charançons ainsi qu'une compétition pour l'accouplement. Une qualité suffissante de fêves fût fournie afin que la compétition entre les femelles pour les sites d'oviposition soit improbable. La capacité d'inhiber l'oviposition de C. rhodesianus par C. maculatus est suggerée comme une raison pour sa supériorité sur C. rhodesianus lorsque les deux espéces compétitione pour des ressources limitées.

Keywords

Callosobruchus maculatusCallosobruchus rhodesianusovipositioninterferenceCallosobruchus maculatusCallosobruchus rhodesianusovipositioninterference
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 17 , Issue 2 , June 1997 , pp. 251 - 255
Copyright
Copyright © ICIPE 1997

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References

REFERENCES

Bellows, T. S. (1982) Analytical models for laboratory populations of Callosobruchus chinensis and Callosobruchus maculatus (Coleoptera: Bruchidae). J. Anim. Ecol. 51, 263–287.CrossRefGoogle Scholar
Giga, D. P. (1982) The comparative biology of four Callosobruchus species with particular reference to competition in C. rhodesianus and C. chinensis. PhD thesis, University of Reading. 149 pp.Google Scholar
Giga, D. P. and Smith, R.H. (1983) Comparative life-history studies of four Callosobruchus species with special reference to Callosobruchus rhodesianus (Pic.) (Coleoptera: Bruchidae). J. stored Prod. Res. 19, 189–198.CrossRefGoogle Scholar
Giga, D. P. and Smith, R. H. (1991) Intraspecific competition in the bean weevils Callosobruchus maculatus and Callosobruchus rhodesianus (Coleoptera: Bruchidae). J. appl. Ecol. 28, 918–929.CrossRefGoogle Scholar
Howe, R. W. and Currie, J. E. (1964) Some laboratory observations on the rates of development, mortality and oviposition of several species of bruchidae breeding in stored pulses. Bull. Ent. Res. 55, 437–477.CrossRefGoogle Scholar
Southgate, B. J. (1958) Systematic notes of species of Callosobruchus of economic importance. Bull. Ent. Res. 49, 591–599.CrossRefGoogle Scholar
Southgate, B. J. (1965) Pulse bruchids in Africa. Proc. XIIth Intl. Congr. Ent. London, p. 612.Google Scholar
Southgate, B. J., Howe, R. W. and Brett, G. (1957) The specific status of Callosobruchus maculatus and Callosobruchus analis (F.). Bull. Ent. Res. 48, 79–88.CrossRefGoogle Scholar
Utida, S. (1941) Studies on experimental populations of the azuki bean weevil, Callosobruchus chinensis (L.). I. The effect of population density on progeny populations. Mem. College Agric. Kyoto University 9, 463–472.Google Scholar
Yoshida, T. (1960) Effect of interspecific competition between two species of bean weevil upon fecundity and fertility. Mem. Fac. Lib. Arts Edn. Miyazaki University 9, 463–472.Google Scholar
Yoshida, T. (1966) Studies on the interspecific competition between bean weevils. Mem. Fac. Lib. Arts Edn. Miyazaki University 20, 59–98.Google Scholar