Abstract
Larvae ofTrichogramma embryophagum Htg., the gregarious parasitoid of eggs of Lepidoptera, ingest the ooplasm of the host by pharyngeal sucking. In the case of a supernumerary number of larvae, some die shortly after all the food has been ingested, although all larvae are still at an early stage of development. The food previously swallowed by the dead animals flows back into the host chorion, and this is ingested by the surviving larvae. As a result of this, there is no wastage of food, and in eggs ofEphestia kuehniella Z. up to 3 larvae always survive to the adult stage.
Résumé
Les larves deTrichogramma embryophagum Htg., parasitoide grégaire des œufs de lépidoptères, consomment l'ooplasme de l'hôte en le suçant à l'aide du pharynx. Dans le cas où il s'agit d'un nombre surnuméraire de larves, quelques-unes meurent peu après que la nourriture a été introduite, bien que toutes les larves se trouvent dans un stade prématuré de développement. La nourriture que ces animaux ont avalée avant leur mort passe dans le chorion de l'hôte et ce sont les larves survivantes qui la consomment. Le résultat est que la nourriture n'est pas gaspillée et que dans les œufs d'Ephestia kuehniella Z. 3 larves tout au plus atteignent toujours le stade adulte.
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References
Klomp, H. — 1956. Over het aantal generaties, de gastheerwisseling en de overwintering vanTrichogramma embryophagum Htg. —Entomol. Berichten, 16, 117–120.
Klomp, H. &Teerink B. J. — 1962. Host selection and number of eggs per oviposition in the egg parasiteTrichogramma embryophagum Htg. —Nature, 195, 1020–1021.
Klomp, H. &Teerink, B. J. — 1967. The significance of oviposition rates in the egg parasiteTrichogramma embryophagum Htg. —Arch. Néerl. Zool., 17, 350–375.
Lenteren, J. C. van &Bakker, K. — 1975. Discrimination between parasitised and unparasitised hosts in the parasitic waspPseudeucoila bochei: a matter of learning. — Nature, 245, 417–419.
Salt, G. — 1937. Experimental studies in insect parasitism V. The sense used byTrichogramma to distinguish between parasitized and unparasitized hosts. —Proc. R. Entomol. Soc. B, 122, 57–75.
Salt, G. — 1961. Competition among insect parasitoids. In: Mechanisms in biological competition. —Symp. Soc. Exp. Biol., 15, 96–119.
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Klomp, H., Teerink, B.J. The elimination of supernumerary larvae of the gregarious egg-parasitoidTrichogramma embryophagum [Hym.: Trichogrammatidae] in eggs of the hostEphestia kuehniella [Lep.: Pyralidae] . Entomophaga 23, 153–159 (1978). https://doi.org/10.1007/BF02371721
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DOI: https://doi.org/10.1007/BF02371721