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INTRASPECIFIC TERTIARY PARASITOIDISM IN ASAPHES LUCENS (HYMENOPTERA: PTEROMALIDAE), AN APHID HYPERPARASITOID

Published online by Cambridge University Press:  31 May 2012

Lolita Levine  and
Daniel J. Sullivan S.J.
Lolita Levine
Affiliation:
Department of Biological Sciences, Fordham University, Bronx, New York 10458
Daniel J. Sullivan S.J.
Affiliation:
Department of Biological Sciences, Fordham University, Bronx, New York 10458
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Abstract

Using the pea aphid, Acyrthosiphon pisum (Harris), as the host and Aphidius smithi Sharma and Subba Rao as the primary parasitoid, intraspecific tertiary parasitoidism was studied in the aphid hyperparasitoid, Asaphes lucens (Provancher). Laboratory experiments indicated that tertiary parasitoidism by a second A. lucens female on a first A. lucens is possible. Although the average success rate over 18 test-days was 16.9%, however, the day of attack by the second A. lucens female in reference to the age of the first A. lucens larva or pupa developing inside the dead aphid "mummy" was of major importance. Success by the second A. lucens in the early days averaged 27.2%, but was significantly reduced to an average of only 1% for the last 7 days. Comparisons are made with similar experiments on intraspecific tertiary parasitoidism using another aphid hyperparasitoid, Dendrocerus carpenteri (Curtis).

Résumé

Le parasitoïdisme intraspécifique tertiaire a été étudié chez l'hyperparasitoïde d'aphide Asaphes lucens (Provancher), en utilisant le puceron de pois Acyrthosiphon pisum (Harris) comme hôte et Aphidius smithi Sharma et Subba Rao comme parasitoïde primaire. Des expériences de laboratoire ont montré que le parasitoïdisme par une deuxième femelle A. lucens sur un premier individu A. lucens est possible. Bien que le taux moyen de succès a été de 16.9% calculé sur 18 jours-tests, le jour d'attaque par la deuxième femelle A. lucens par rapport à l'âge de la première larve ou pupe se développant à l'intérieur de la "momie" de l'aphide mort, s'est avéré être de première importance. Le succès du deuxième A. lucens au cours des premiers jours fut de 27.2% en moyenne, alors qu'il était réduit à seulement 1% en moyenne pour les 7 derniers jours. Des comparaisons sont faites avec des expériences semblables portant sur le parasitoïdisme intraspécifique tertiaire d'un autre hyperparasitoïde d'aphide, Dendrocerus carpenteri (Curtis).

Type
Articles
Information
The Canadian Entomologist , Volume 115 , Issue 12 , December 1983 , pp. 1653 - 1658
Copyright
Copyright © Entomological Society of Canada 1983

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