Abstract
AbstractPuparia of house flies, Musca domestica L., and stable flies, Stomoxys calcitrans (L.) (Diptera: Muscidae), were collected on dairy farms in Prince Edward Island (PEI) and New Brunswick (NB) and held for emergence of hymenopterous parasitoids. Percent parasitism for PEI in 2003 and 2004 was 6.7 (n = 10 060 puparia) and 1.0 (n = 36 992 puparia), respectively. Percent parasitism for NB was not determined in 2003, but was 9.1% (n = 3052 puparia) in 2004. A parasitoid provisionally identified as Phygadeuon ?fumator Gravenhörst (Ichneumonidae) predominated in both provinces. Additional species recovered included Aphaereta pallipes (Say) (Braconidae) and Muscidifurax raptor Girault and Saunders, Spalangia cameroni Perkins (PEI only), Spalangianigra Latreille (NB only), Spalangia subpunctata Förster (NB only), Trichomalopsis americana (Gahan) (PEI only), and Urolepis rufipes (Ashmead) (Pteromalidae). Dissection of host puparia from which neither flies nor wasps emerged yielded a relatively large number of additional parasitoids, particularly S. nigra.
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