Abstract
This paper addresses the competitive interaction between Cotesia sesamiae, a gregarious larval endoparasitoid that is native to Africa, and Cotesia flavipes, an introduced parasitoid from southern Pakistan which has recently been established in East Africa for biological control of the exotic stemborer, Chilo partellus. The two parasitoids are morphologically similar, and they both attack medium-sized to large larval stages of gramineous lepidopteran stemborers. Based on previous work which suggested that Cotesia flavipes was competitively superior to Co. sesamiae, we speculated that Co. sesamiae may be locally extirpated in some areas of Africa. However, evidence from the field does not support this prediction. Recent field surveys in areas where both parasitoids occur, revealed that Co. sesamiae was still present, and densities were not declining. The interaction of the two parasitoids, as well as the influence of this interaction on host regulation, are discussed.
Résumé
Cet article discute de la compétition entre Cotesia sesamiae et Cotesia flavipes deux parasitoïdes internes et grégaires, morphologiquement semblables. Ils attaquent les larves de foreurs de tige de graminés. Le premier est endémique â l’Afrique et le second a été importé du sud Pakistan dans la cadre de la lutte biologique classique en Afrique de l’est contre, Chilo Partellus, un foreur de tige de céréales originaire d’Asie. Sur la base des travaux antérieurs qui ont montré que Co. flavipes était competitivement supérieur â Co. sesamiae, nous avions spéculé que Cotesia sesamiae pourrait éventuellement être éliminé dans certaines régions d’Afrique. Toutefois, des données récentes de terrain ne sont pas en accord avec cette hypothèse. Des enquêtes récentes dans les régions où les deux parasitoïdes existent ont montré que Co. sesamiae est toujours présent et que ses densités ne décroissent pas. Les interactions entre les deux parasitoïdes et l’effet de cette interaction sur la régulation de l’hôte sont discutés.
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References
Bonhof, M. J., Overholt, W. A., van Huis, A. and Polaszek, A. (1998) Natural enemies of cereal stemborers in East Africa: A review. Insect Sci. Applic. 17, 19–36.
Follet, P. A. and Duan, J. J. (Eds) (1999) Nontarget Effect of Biological Control. Kluwer, Dordrecht, The Netherlands. 316 pp.
Kfir, R. (1992) Seasonal abundance of the stem borer Chilo Partellus (Lepidoptera: Pyralidae) and its parasites on summer grain crops. J. Econ. Entomol. 85, 518–529.
Mathez, F. C. (1972) Chilo Partellus Swinh, C. orichalcociliella Strand (Lep., Crambidae), Sesamia calamistis Hamps. (Lep, Noctuidae) on maize in the coast province, Kenya. Mitt. Schweiz. Entomol. Gesellschaft 45, 267–289.
Mbapila, J. C. (1996) Comparative seasonal adaptation of Cotesia flavipes Cameron and Cotesia sesamiae (Cameron) (Hymenoptera: Braconidae) to Chilo Partellus Swinhoe (Lepidoptera: Pyralidae) on the Kenya coast. PhD Thesis. University of Dar es Salaam.
Mbapila, J. C. and Overholt, W. A. (1997) Oviposition, development and searching behaviour of Cotesia flavipes Cameron and Cotesia sesamiae (Cameron) (Hymenoptera: Braconidae) in relation to aestivating and non-aestivating Chilo spp. (Lepidoptera: Pyralidae) larvae in maize. African Entomologic 5, 35–39.
Ministry of Agriculture, Kenya (1987) Fertilizer Use Recommendation Project (Phase II). Final Report. Ministry of Agriculture, Nairobi, Kenya.
Mohyuddin, A. I. and Greathead, D. J. (1970) An annotated list of the parasites of graminaceous stem borers in East Africa, with a discussion of their potential in biological control. Entomophaga 15, 241–274.
Mohyuddin A. I. (1971) Comparative biology and ecology of Apanteles flavipes and A. sesamiae Cam. as parasites of graminaceous borers. Bull. Entomol. Res. 61, 33–39.
Ngi-Song, A. J., Overholt, W. A. and Ayertey, J. N. (1995) Host suitability of African gramineous stemborers for the development of Cotesia flavipes and Cotcsia sesamiae (Hymenoptera: Braconidae). Environ. Entomol.24, 978–984.
Ngi-Song, A. J. and Overholt, W. A. (1997) Host location and acceptance by Cotesia flavipes Cameron and C. stsamiae (Cameron) (Hymenoptera: Braconidae), parasitoids of African gramineous stemborers: Role of frass and other host cues. Biological Control 9, 136–142.
Newham, N. (1993) Swarm of protest greets pest control by wasps. New Scientist. August, p. 5.
Ofomata, V. C., Overholt, W. A., van Huis, A., Egwuatu, R. I. and Ngi-Song, A. J. (1999) Niche overlap and interspecific association between Chilo Partellus and Chilo orichalcociliellus on the Kenya coast. Entomol. Exp. Appl. 93, 141–148.
Ofomata, V. C., Overholt, W. A., Lux, S. A., van Huis, A. and Egwuatu, R. I. (2000) Comparative studies on the fecundity, egg survival, larval feeding, and development of Chilo Partellus and Chilo orichalcociliellus (Lepidoptera: Crambidae) on five grasses. Ann. Entomol. Soc. Am. (in press).
Omwega, C. O., Overholt, W. A., Mbapila, J. C. and Kimani-Njogu, S. W. (1997) Establishment and dispersal of Cotesia flavipes Cameron (Hymenoptera: Braconidae), an exotic endoparasitoid of Chilo Partellus (Swinhoe) (Lepidoptera: Pyralidae) in. northern Tanzania. African Entomology 5, 71–75.
Overholt, W. A. (Ed.) (1998) Biological control, pp. 349–362. In Cereal Stemborers in Africa: Taxonomy, Natural Enemies and Control (Edited by A. Polaszek). CAB International, Wallingford, UK.
Overholt, W. A. and Smith Jr. (1990) Comparative evaluation of three exotic insect parasites (Hymenoptera: Braconidae) against the south western corn borer (Lepidoptera: Pyralidae) in corn. Environ. Entomol. 19, 1155–1162.
Overholt, W. A., Ngi-Song, A. J., Omwega, C. O., Kimani-Njogu, S. W., Mbapila, J., Sallam, M. N. and Ofomata, V. C. (1997) A review of the introduction and establishment of Cotesia flavipes Cameron (Hymenoptera: Braconidae) in East Africa for biological control of cereal stemborers. Insect Sci. Applic. 17, 79–88.
Overholt, W. A., Ochieng, J. O., Lammers, P. M. and Ogedah, K. (1994) Rearing and field release methods for Cotesia flavipes Cameron (Hymenoptera: Braconidae), a parasitoid of tropical gramineous stemborers. Insect Sci. Applic. 15, 253–259.
Polaszek, A. and Walker, A. K. (1991) The Cotesia flavipes species complex: parasitoids of cereal stemborers in the tropics. Redia 74, 335–341.
Sallam, M. N. (1998) Compare rive evaluation of certain aspects of the biology of Cotesia flavipes and Cotesia sesamiae (Hymenoptera: Braconidae) for the management of Chilo Partellus (Lepidoptera: Pyralidae) in Kenya. PhD Thesis. Kenyatta University.
Sallam, M. N., Overholt, W. A. and Kairu, E. (1999) Comparative evaluation of Cotesia flavipes and Cotesia sesamiae (Hymenoptera: Braconidae) for the management of Chilo Partellus (Lepidoptera: Pyralidae) in Kenya. Bull. Entomol. Res. 89, 185–191.
SAS Institute (1988) Users Guide: Statistics, Release 6.0.3 éd. SAS Institute, Cary, NC.
Skovgard, H. and Pats, P. (1996) Effects of intercropping on maize stemborers and their natura! enemies. Bull. Entomol. Res. 86, 599–607.
Zhou, G., Baumgartner, J. and Overholt, W. A. (2001) Impact assessment of an exotic parasitoid on stemborer (Lepidoptera) population dynamics in Kenya. Ecological Applications (In press).
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Sallam, M.N., Overholt, W.A., Kairu, E. et al. Will Cotesia flavipes Drive Its African Homologue, Cotesia sesamiae, to Extinction?. Int J Trop Insect Sci 21, 297–302 (2001). https://doi.org/10.1017/S1742758400008389
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DOI: https://doi.org/10.1017/S1742758400008389
Key Words
- Cotesia flavipes
- Cotesia sesamiae
- Chilo Partellus
- parasitoid competition
- classical biological control