Biological Invasions (2005) 7, 553-556

Annabelle Firlej, Guy Boivin, Éric Lucas and Daniel Coderre (2005)
First report of Harmonia axyridis Pallas being attacked by Dinocampus coccinellae Schrank in Canada
Biological Invasions 7 (4), 553-556
Abstract: Field parasitism of two lady beetles, a recently introduced species, Harmonia axyridis Pallas, and an indigenous species, Coleomegilla maculata lengi Timberlake, by Dinocampus coccinellae Schrank (Hymenoptera: Braconidae) was investigated in southwestern Québec. Adult coccinellids were sampled from June to September 2001 in alfalfa and corn fields. Parasitism rates were recorded by dissection and rearing of coccinellids in controlled condition. The average proportions of coccinellids with a parasitoid larva were 4.6% for H. axyridis and 32% for C. maculata but 0% of the H. axyridis and 5.9% of theC. maculata were successfully parasitized. In July, more C. maculata than H. axyridis were found to be parasitized and among all individuals dissected, C. maculata were more frequently found superparasitized than H. axyridis. Our results suggest that D. coccinellae is not well adapted to H. axyridis in Quebec. This is the first mention of H. axyridis being attacked by D. coccinellae in Canada.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: English)
Link to article at publishers website
Database assignments for author(s): Annabelle Firlej, Éric Lucas, Daniel Coderre, Guy Boivin

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution
environment/habitat manipulation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
Harmonia axyridis (predator)			Canada (east)
Coleomegilla maculata (predator)			Canada (east)
Dinocampus coccinellae (parasitoid)			Canada (east)