Abstract
The effects of the host plant on the level of parasitism, development time and mortality ofEncarsia formosa Gahan parasitizing castor whitefly,Trialeurodes ricini Misra were studied. The level of parasitism varied significantly between host plants; ranging from an average high of 13/50T. ricini larvae parasitized per parasitoid per day on aubergine to an average low of 1.6/50 host larvae on potato. Development time ofE. formosa varied according to whitefly host plant; minimum average development time was 17.7 days on cotton. The mortality ofE. formosa was high on all host plants tested, and the type of host plant had no significant influence on mortality. Aubergine proved to be the most satisfactory laboratory plant for rearingE. formosa onT. ricini.
Résumé
On a étudié l'influence de la plant-hôte sur le niveau du parasitisme, la durée de développement et la mortalité d'Encarsia formosa Gahan, parasitoïde deTrialeurodes ricini Misra. Le taux de parasitisme a varié de façon significative entre les diverses plantes-hôtes, entre un maximum moyen de 13/50 larves deT. ricini sur aubergine et un minimum moyen de 1,6/50 larves sur pomme de terre. Le développement d'Encarsia formosa varie en fonction de la plant-hôte deT. ricini. La durée moyenne de développement est de 17,7 jours sur coton. La mortalité du parasitoïde est élevée sur toutes les plante-hôtes étudiéees mais celle-ci ne présente pas de différences significatives entre plantes-hôtes. L'aubergine se révèle la plante la mieux adaptée à l'élevage en laboratoire d'Encarsia formosa surT. ricini.
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Shishehbor, P., Brennan, P.A. Parasitism ofTrialeurodes ricini byEncarsia formosa: Level of parasitism, development time and mortality on different host plants. Entomophaga 40, 299–305 (1995). https://doi.org/10.1007/BF02373716
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DOI: https://doi.org/10.1007/BF02373716