Abstract
The solitary endoparasite,Cotesia rubecula, was superior to the gregarious endoparasite,Cotesia glomeratus, in tests of intrinsic competition for their hostArtogeia rapae. When an egg ofC. rubecula was oviposited in the host prior to those ofC. glomeratus, C. rubecula always won the ensuing competition. When an egg ofC. rubecula was laid in the same host within 48 h after oviposition byC. glomeratus, C. rubecula was successful in more than 90% of the interactions. Even when the egg ofC. rubecula was oviposited in the same host 72 to 96 h after oviposition byC. glomeratus, C. rubecula won the competition approximately 33% of the time. The implications of intrinsic competition are discussed in relation to the establishment ofC. rubecula in an ecosystem containingA. rapae andC. glomeratus.
Résumé
L'endoparasite solitaireCotesia rubecula était supérieur à l'endoparasite grégaire,Cotesia glomeratus dans des tests de compétition interspécifique au niveau de leur hôteArtogeia rapae. Quand un œuf deC. rubecula était pondu dans l'hôte avant celui deC. glomeratus, C. rubecula gagnait toujours la compétition s'ensuivant. Quand un œuf deC. rubecula était déposé dans le même hôte dans les 48 heures après la ponte deC. glomeratus, C. rubecula l'emportait dans plus de 90% des interactions. Même quand l'œuf deC. rubecula était pondu dans le même hôte de 72 à 96 heures après la ponte deC. glomeratus, C. rubecula remportait la compétition approximativement dans les 33% des cas. Les implications de la compétition interspécifique sont discutées en relation avec l'établissement deC. rubecula dans un écosystème renfermantA. rapae etC. glomeratus.
Similar content being viewed by others
References
Conde, J.E. &Rabinovich, J.E. — 1979. Larval competition betweenTelenomus costalimai [Hymenoptera: Scelionidae] andOencyrtus trinidadensis venatorius [Hymenoptera: Encyrtidae] after simultaneous oviposition inRhodnius prolixus eggs [Hemiptera: Reduviidae]. —J. Med. Entomol., 76, 428–431.
Corrigan, J.E. — 1982.Cotesia (Apanteles) rubecula [Hymenoptera: Braconidae] recovered in Ottawa, Ontario ten years after its release. —Proc. Entomol. Soc. Ont., 113, 71.
Fisher, R.C. — 1961. A study in insect multiparasitism. II. The mechanism and control of competition for the host. —J. Exp. Biol., 38, 605–628.
Parker, F.D., Lawson, F.R. &Pinnell, R.E. — 1971. Suppression ofPieris rapae using a new control system: mass releases of both the pest and its parasites. —J. Econ. Entomol., 64, 721–735.
Pemberton, C.E. &Willard, H. F. — 1918. Inter-relations of fruit fly parasites in Hawaii. —J. Agric. Res., 12, 285–295.
Puttler, B., Parker, F.D., Pinnell, R.E. &Thewke, S.E. — 1970. Introduction ofApanteles rubecula into the United States as a parasite of the imported cabbageworm. —J. Econ. Entomol., 63, 304–305.
Richards, O.W. — 1940. The biology of the small white butterfly (Pieris rapae), with special reference to the factors controlling its abundance. —J. Anim. Ecol., 9, 243–288.
Salt, G. — 1961. Competition among insect parasitoids. —Symp. Soc. Exp. Biol., 15, 96–119.
Vinson, S.B. &Ables, J.R. — 1980. Interspecific competition among endoparasitoids of tobacco budworm larvae [Lep.: Noctuidae]. —Entomophaga, 25, 357–362.
Wallner, W.E., Weseloh, R.M. &Grinberg, P.S. — 1982. Intrinsic competition betweenApanteles melanoscelus [Hym.: Braconidae] andRogas lymantriae [Hym.: Braconidae] reared onLymantria dispar [Lep.: Lymantriidae]. —Entomophaga, 27, 99–103.
Wilkinson, A.T.S. — 1966.Apanteles rubecula Marsh. and other parasites ofPieris rapae in British Columbia —J. Econ. Entomol., 59, 1012–1013.
Williamson, G.D. — 1971. Insect liberations in Canada. Parasites and predators 1970. —Agric. Can. Liberation Bulletin, No. 34., 16 pp.
Williamson, G.D. — 1972. Insect liberations in Canada. Parasites and predators 1971. —Agric. Can. Liberation Bulletin, No. 35., 16 pp.
Wylie, H.G. — 1972. Larval competition among three hymenopterous parasite species on multiparasitized housefly (Diptera) pupae. —Can. Entomol., 104, 1181–1190.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Laing, J.E., Corrigan, J.E. Intrinsic competition between the gregarious parasite,Cotesia glomeratus and the solitary parasite.Cotesia rubecula [Hymenoptera: Braconidae] for their host.Artogeia rapae [Lepidoptera: Pieridae]. Entomophaga 32, 493–501 (1987). https://doi.org/10.1007/BF02373518
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02373518