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NOTE ON CYRTOGASTER VULGARIS WALKER (HYMENOPTERA: PTEROMALIDAE), A SECONDARY PARASITE OF THE ALFALFA BLOTCH LEAFMINER (DIPTERA: AGROMYZIDAE), WITH DESCRIPTIONS OF THE IMMATURE STAGES1

Published online by Cambridge University Press:  31 May 2012

J.C. Guppy  and
F. Meloche
J.C. Guppy
Affiliation:
Agriculture Canada, Plant Research Centre, Ottawa, Ontario, Canada K1A 0C6
F. Meloche
Affiliation:
Agriculture Canada, Plant Research Centre, Ottawa, Ontario, Canada K1A 0C6
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Abstract

Cyrtogaster vulgaris Walker, a pupal parasite of the alfalfa blotch leafminer, Agromyza frontella (Rondani), acts as a secondary agent as well. The adults, which deposit their eggs within host puparia, apparently do not discriminate between healthy leafminers and those parasitized by Dacnusa dryas (Nixon). The egg and larval cephalic structures of C. vulgaris are described and illustrated and the final-instar larval skins of the two parasite species are compared.

Résumé

Cyrtogaster vulgaris Walker, parasite de la pupe de l’agromyze de la luzerne, Agromyza frontella (Rondani), se manifeste également comme agent secondaire. Les adultes, qui pondent leurs oeufs à l’intérieur du puparium de l’hôte, ne semblent pas pouvoir distinguer les agromyzes sains de ceux parasités par Dacnusa dryas (Nixon). Les auteurs présentent une description et des figures de l’oeuf et des structures céphaliques larvaires de C. vulgaris, et comparent les cuticules du dernier stade larvaire des deux espèces parasites.

Type
Articles
Information
The Canadian Entomologist , Volume 121 , Issue 11 , November 1989 , pp. 929 - 932
Copyright
Copyright © Entomological Society of Canada 1989

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