Abstract
In laboratory studies the effect of parasitism by the egg-larval endoparasitoidChelonus insularis Cresson on the resulting larvae of 2 host species,Heliothis virescens (F.) andSpodoptera ornithogalli Guénée) were determined by comparing daily measurements of larval weights. Growth of parasitized larvae of both host species was slower than growth of unparasitized larvae. Injections of fluids from the female parasitoid's calyx or poison gland intoH. virescens eggs retarded subsequent larval growth. However, a combination of fluids from these 2 organs produced the most significant reduction in the host larval growth rate. The growth reducing factor(s) was also effective when injected into 5-day-old host larvae.
Résumé
Au laboratoire les effets du parasitisme par l'endoparasitoïde ovolarvaireChelonus insularis Cresson chez les larves des espèces hôtes:Heliothis virescens (F.) etSpodoptera ornithogalli (Guénée) ont été déterminés par la comparaison journalière des poids des larves. La croissance des larves parasitées des 2 espèces hôtes a été plus faible que celle des larves non parasitées. L'injection dans des œufs deH. virescens des sécrétions du calyx ou de la glande à poison de la femelle du parasitoïde a entraîné un retard dans le développement de la larve. Toutefois, un mélange des sécrétions de ces 2 organes a produit la réduction la plus significative de la vitesse du développement de la larve hôte. Le ou les facteurs ralentissant la croissance sont également actifs par injection dans des larves hôtes de 5 jours.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Guillot, F. S. &Vinson, S. B. — 1972. The role of the calyx and poison gland ofCardiochiles nigriceps in the host-parasitoid relationship. —J. Insect Physiol., 18, 1315–1321.
Hawlitzky, N. — 1970. Étude expérimentale des relations hôtes-parasites chez les insectes-I. Caractères respiratoires et pondéraux des chenilles d'Anagasta kuehniella Zell. [Lep. Pyralidae] saines ou parasitées parPhanerotoma flavitestacea Fish [Hym. Braconidae]. —Ann. Zool. Ecol. Anim., 2, 579–593.
Hawlitzky, N. &Chevin, S. — 1979. Etude expérimentale des relations hôte-parasite chez les insectes-II. Action d'un parasite ovo-larvaire,Phanerotoma flavitestacea Fisch. [Hym. Braconidae] sur quelques caractères biologiques et anatomiques de son hôte,Anagasta kuehniella Zell. [Lep. Pyralidae]. —Arch. Zool. Exp. Gen., 120, 337–352.
Jones, R. L. &Lewis, W. J. — 1971. Physiology of the host-parasitoid relationship betweenHeliothis zea andMicroplitis croceipes. —J. Insect Physiol., 19, 921–927.
Rechav, Y. &Orion, T. — 1975. The development of the immature stages ofChelonus inanitus. —Ann. Entomol. Soc. Am., 68, 457–462.
Stoltz, D. B. &Vinson, S. B. — 1979. Viruses and parasitism in insects, p. 125–171. In: Advances in Virus Research (M. A. Lauffer, F. B. Bank, K. Maramorosch &K. M. Smith, eds.) —Academic Press, NY, Vol. 24, 426 pp.
Vanderzant, E. S., Richardson, C. D. &Fort, S. W., Jr. — 1962. Rearing of the bollworm on artificial diet. —J. Econ. Entomol. 55, 170.
Vinson, S. B. — 1972. Effect of the parasitoid,Campoletis sonorensis, on the growth of its host,Heliothis virescens. —J. Insect Physiol, 18, 1509–1514.
— 1975. Biochemical coevolution between parasitoids and their hosts. In: Evolutionary Strategies of Parasitic Insects and Mites (P. W. Price, ed.) —Plenum, NY, 224 pp.
Vinson, S. B., Edson, K. M. &Stoltz, D. B., — 1979. Effect of a virus associated with the reproductive systems of the parasitoid wasp,Campoletis sonorensis, on host weight gain. —J. Invertebr. Pathol., 34, 133–137.
Vinson, S. B. &Iwantsch, G. F. — 1980. Host regulation by insect parasitoids. —Q. Rev. Biol., 55, 143–165.
Author information
Authors and Affiliations
Additional information
Approved for publication in TA-15682 by the Director, Texas Agricultural Experiment Station.
Rights and permissions
About this article
Cite this article
Ables, J.R., Bradleigh Vinson, S. Regulation of host larval development by the egg-larval endoparasitoidChelonus insularis [Hym.: Braconidae] . Entomophaga 26, 453–458 (1981). https://doi.org/10.1007/BF02374720
Issue Date:
DOI: https://doi.org/10.1007/BF02374720