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REPRODUCTION AND LONGEVITY OF CABBAGE APHID, BREVICORYNE BRASSICAE (HOMOPTERA: APHIDIDAE), PARASITIZED BY DIAERETIELLA RAPAE (HYMENOPTERA: APHIDIIDAE)

Published online by Cambridge University Press:  31 May 2012

M. Mackauer
Affiliation:
Centre for Pest Management, Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6
S. Kambhampati
Affiliation:
Centre for Pest Management, Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6

Abstract

Parasitized cabbage aphids, Brevicoryne brassicae (Linnaeus), produced fewer offspring than unparasitized aphids. Aphids parasitized by Diaeretiella rapae (M'Intosh) during the first, second, or third instar died before producing any offspring; those parasitized during the fourth instar or the adult stage produced a variable number of offspring. The aphid's survival time was correlated with the rate of development, as measured by the length of the pre-reproductive period. A multiple-linear-regression equation is provided for predicting the mean total fecundity of parasitized cabbage aphids from the host age at the beginning of parasitism and the pre-reproductive period.

Résumé

Des pucerons du choux parasités, Brevicoryne brassicae (Linnaeus), ont produit moins de progénitures que des individus non parasités. Des individus parasités par Diaeretiella rapae (M'Intosh) lors ou premier, deuxième ou troisième stade, sont morts avant de se reproduire; ceux qui furent parasités durant le quatrième stade ou le stade adulte ont produit un nombre variable de progénitures. La durée de survie des pucerons était corrélée au taux de développement tel que mesuré par la durée de la période pré-reproductive. Une équation de régression linéaire-multiple est présentée, laquelle permet de prédire la fécondité totale moyenne de pucerons du choux parasités à partir de l'âge de l'hôte au début du parasitisme et de la période pré-reproductive.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1984

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