The pea leafminer, Liriomyza huidobrensis (Blanchard) (Diptera: Agromyzidae), was first found in Ontario in 1998. In 2002, a study was undertaken near Bradford, Ontario to examine the parasitoid complex of this exotic leafminer. Pupae of L. huidobrensis were field-collected from six host species: celery (Apium graveolens L.), spinach (Spinacia oleracea L.), pea (Pisum sativum L.), potato (Solanum tuberosum L.), Asian broccoli (Brassica oleracea L.), and lettuce (Lactuca sativa L.). Emergence of parasitoids or adult leafminers was monitored daily under controlled environment conditions. Hymenopteran wasps in two families, the Braconidae and Pteromalidae, were found. Differences in rates of parasitism were observed between different host plants, with the highest parasitism rate (28.1%) occurring in pupae from celery plants.
Species 1: Diptera Agromyzidae Liriomyza huidobrensis (pea leafminer)
Species 2: Hymenoptera Pteromalidae
Species 3: Hymenoptera Braconidae
Keywords: parasitoid
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