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The comparative biologies of two hymenopterous parasites of the chaff scale,Parlatoria pergandii

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La biologie des aphelinidesAphytis hispanicus (Mercet) etProspaltella inquirenda Silvestri, respectivement ecto et endoparasite deParlatoria pergandii Comstock, a été étudiée comparativement en laboratoire.A. hispanicus accomplit son cycle en 34 jours environ à 20 °C et en 16 jours à 28 °C; il produit en moyenne 23,8 descendants, tandis que pourP. inquirenda ces durées sont de 62 et 26 jours et le nombre moyen de descendants 20,6. Le comportement pendant l'oviposition et les interactions diverses entre l'hôte et le parasite ont été notés. Le nectar d'agrumes a prolongé la vie des deux parasites autant que le miel.A. hispanicus a généralement une vie plus prolongée queP. inquirenda. Le premier parasite a mieux survécu dans des conditions de forte humidité relative (61%, 80%), maisP. inquirenda s'est trouvé favorisé dans des conditions de faible humidité relative, ainsi qu'après une exposition à des températures extrêmes. En conclusion,A. hispanicus a un taux plus rapide de croissance, tandis queP. inquirenda est mieux adapté aux conditions naturelles.

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Authors and Affiliations

  1. Faculty of Agriculture, The Hebrew University, Rehovot, Israel

    Uri Gerson

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  1. Uri Gerson
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Additional information

This research has been finaneed in part by Grant No. FG-Is-227 made by the United States Department of Agriculture under P.L. 480.

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Gerson, U. The comparative biologies of two hymenopterous parasites of the chaff scale,Parlatoria pergandii . Entomophaga 13, 163–173 (1968). https://doi.org/10.1007/BF02371787

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