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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
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.
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- Copyright © Entomological Society of Canada 1989
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