European Journal of Entomology (2007) 104, 737-743

E. Lucas, C. Vincent, G. Labrie, G. Chouinard, F. Fournier, F. Pelletier, N.J. Bostanian, D. Coderre, M.-P. Mignault and P. Lafontaine (2007)
The multicolored Asian ladybeetle Harmonia axyridis (Coleoptera: Coccinellidae) in Quebec agroecosystems ten years after its arrival
European Journal of Entomology 104 (4), 737-743
Abstract: The multicolored Asian ladybeetle, Harmonia axyridis (Coleoptera: Coccinellidae), was first reported in southern Canada in 1994. In this study, we examined the status of the ladybeetle in Quebec agroecosystems seven to ten years after its arrival. We integrated the findings from eight independent field studies carried out in pome fruit, grapes, medicinal crops, field corn, sweet corn, sweet pepper, lettuce, and soybean. Nine aphidophagous and 6 coccidophagous coccinellid species were sampled on these crops. Among these aphidophagous species, three invasive (H. axyridis, Coccinella septempunctata and Propylea quatuordecimpunctata) as well as one indigenous species (Coleomegilla maculata lengi) were consistently present. Higher richness was observed in perennial crops, where the 6 coccidophagous coccinellids were almost exclusively present. Higher abundance of aphidophagous coccinellids was observed in field and sweet corn. The multicolored Asian ladybeetle was a dominant species of the coccinellid assemblage in all crops monitored.
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(original language: English)
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Database assignments for author(s): Éric Lucas, Geneviève Labrie, Daniel Coderre, Charles Vincent, Noubar J. Bostanian

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
surveys/distribution/isolation
environment/habitat manipulation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
Coccinella septempunctata (predator)			Canada (east)
Harmonia axyridis (predator)			Canada (east)
Coleomegilla maculata (predator)			Canada (east)
Propylea quatuordecimpunctata (predator)			Canada (east)