Biological Invasions (2011) 13, 1135-1149

Lloyd M. Dosdall, Héctor Cárcamo, Owen Olfert, Scott Meers, Scott Hartley and John Gavloski (2011)
Insect invasions of agroecosystems in the western Canadian prairies: case histories, patterns, and implications for ecosystem function
Biological Invasions 13 (5), 1135-1149
Abstract: Agroecosystems in the western Canadian provinces of Alberta, Saskatchewan, and Manitoba have been invaded by several alien herbivorous insects from several orders and families. These species have caused very substantial reductions in yield and quality of the dominant crops grown in this region, including cereals (primarily wheat, Triticum aestivum L., barley, Hordeum vulgare L., and oats Avena sativa L.), oilseeds (primarily canola, Brassica napus L. and Brassica rapa L., and mustard, Sinapis alba L. and Brassica juncea (L.) Czern.), and pulses (primarily field pea, Pisum sativum L., lentil, Lens culinaris Medik., and chickpea, Cicer arietinum L.). In this study, we used literature searches to identify the major species of insect pests of field crops in western Canada and determine those species indigenous to the region versus species that have invaded from other continents. We summarize invasion patterns of the alien species, and some estimated economic costs of the invasions. We document the invasion and dispersal patterns of the cereal leaf beetle, Oulema melanopus L. (Coleoptera: Chrysomelidae), for the first time in all three provinces. We also report the co-occurrence of its exotic parasitoid, Tetrastichus julis (Walker) (Hymenoptera: Eulophidae), and implications for classical biological control. We present results of field studies describing the dispersal patterns of a second recent invader, the pea leaf weevil, Sitona lineatus L. (Coleoptera: Curculionidae). The implications of invasions in this region are discussed in terms of economic and ecological effects, and challenges posed for pest mitigation.
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Link to article at publishers website
Database assignments for author(s): Lloyd M. Dosdall, Owen Olfert, Héctor A. Carcamo, John Gavloski

Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution
Research topic(s) for beneficials or antagonists:
surveys/distribution/isolation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Sitona lineatus		Canada (west)
	Oulema melanopa		Canada (west)
Tetrastichus julis (parasitoid)	Oulema melanopa		Canada (west)