First report of Harmonia axyridis Pallas being attacked by Dinocampus coccinellae Schrank in Canada

first record, Harmonia axyridis 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 (Hyme-noptera: 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 rear-ing 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 the C. 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 superparasi-tized than H. axyridis. Our results suggest that D. coccinellae is not well adapted to H. axyridis in Que-bec. This is the first mention of H. axyridis being attacked by D. coccinellae in Canada. Classical biological control, the introduction of non-indigenous species to control exotic pests, has been used in North America for over 100 years but with variable success. The intro-duction of exotic species can have both ecological and genetic impacts on native communities (Sim