BioControl (2000) 45, 415-423

D.W. Langor, S.C. Digweed, D.J.M. Williams, J.R. Spence and C. Saunders (2000)
Establishment and spread of two introduced parasitoids (Ichneumonidae) of the birch leafminer, Fenusa pusilla (Lepeletier) (Tenthredinidae)
BioControl 45 (4), 415-423
Abstract: Lathrolestes nigricollis (Thomson) and Grypocentrus albipes Ruthe, Palearctic specialist parasitoids of the birch-leafmining sawfly Fenusa pusilla (Lepeletier), were imported from central Europe and released at three locations in Edmonton, Alberta, Canada during 1994-1996. Parasitoids became established at two locations, L. nigricollis at both and G. albipes at one, and were recovered for 3-5 years after release. Lathrolestes nigricollis has dispersed throughout most of Edmonton, and at least 13 km from release sites, but G. albipes has been recovered only 400-500 m from one release site. Five years after introduction at one site, percent parasitism by L. nigricollis was 78% and 84% for the first and second generations, respectively, and about 48% of parasitoid eggs were encapsulated.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Daryl J.M. Williams

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
classical biocontrol/new introduction

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Fenusa pumila		Canada (west)
Perilissus nigricollis (parasitoid)	Fenusa pumila		Canada (west)
Grypocentrus albipes (parasitoid)	Fenusa pumila		Canada (west)