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Parasitoids (Hymenoptera: Braconidae: Aphidiinae) of rabbitbrushaphids and linkage with agriculturally important pest aphids in WashingtonState, United States of America

Published online by Cambridge University Press:  06 August 2012

Erin N. Hollingbery ,
K.S. Pike ,
G. Graf  and
D. Graf
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Abstract

Rabbitbrush, Chrysothamnus Nuttall spp. (Asteraceae), is acommon perennial native shrub across the inland western United States. Inthe Columbia Basin growing district of Washington State, rabbitbrush isoften found in close proximity to potatoes and other agronomic crops, butits value as a conservation reservoir and source of parasitoids of merit inagriculture is unknown. Here, we define the aphid parasitoids frequentingrabbitbrush, their aphid host preferences, seasonal occurrence, and linkageor association with other aphids of economic and noneconomic importance.Extensive field collections, lab-holdings, and rearings were used to exploreand characterise the fauna. One new species of aphidiine parasitoid isdescribed and illustrated: Praon cowiche Hollingbery andPike, new species and a key to the parasitoids of rabbitbrushaphids is provided.

Résumé

Les bigelovies, Chrysothamnus Nuttall spp. (Asteraceae),sont des arbustes vivaces indigènes communs dans toute la région intérieurede l'ouest des États-Unis. Dans la zone de croissance du bassin du Columbiade l’état de Washington, la bigelovie se retrouve souvent en étroiteproximité des pommes de terre et d'autres cultures agronomiques sans qu'onconnaisse sa valeur comme réservoir de conservation et de source deparasitoïdes d'intérêt agricole. Nous déterminons ici les parasitoïdes despucerons vivant sur la bigelovie, leurs préférences de pucerons hôtes, leurrépartition saisonnière et leurs liens ou associations avec d'autrespucerons avec ou sans importance économique. Des récoltes importantes sur leterrain, des maintiens en laboratoire et des élevages nous ont servi àexplorer et caractériser la faune. Nous décrivons et illustrons une nouvelleespèce d'aphidiiné parasitoïde, Praon cowiche Hollingberyet Pike, nouvelle espèce, et nous dressons une cléd'identification des parasitoïdes des pucerons de la bigelovie.

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Type
Original Article
Information
The Canadian Entomologist , Volume 144 , Issue 5 , October 2012 , pp. 621 - 634
Copyright
Copyright © Entomological Society of Canada 2012

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