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A review of known parasitoids of hemlock looper (Lepidoptera: Geometridae) in Canada and first records of egg and larval parasitoids in Labrador forests

  • Rachid Sabbahi (a1), Lucie Royer (a2), James E. O’Hara (a3) and Andrew M.R. Bennett (a3)

Abstract

A rearing study of egg and larval parasitoids of hemlock looper (Lambdina fiscellaria (Guenée); Lepidoptera: Geometridae) was undertaken during an outbreak of this pest in Labrador, Newfoundland and Labrador, Canada. Six parasitoid species were found: Telenomus coloradensis Crawford and T. droozi Muesebeck (Hymenoptera: Platygastridae), Winthemia occidentis Reinhard and Blondelia eufitchiae (Townsend) (Diptera: Tachinidae), as well as one species of Phobocampe Förster and Mesochorus vittator (Zetterstedt) (Hymenoptera: Ichneumonidae). None of them was a new Canadian record. To facilitate understanding of the regional parasitoid assemblage in Labrador, we compiled all published records in Canada and collated all specimen records from the Canadian National Collection of Insects, Arachnids, and Nematodes (Ottawa, Ontario, Canada). This comprehensive list will aid researchers interested in potential biological control candidates for hemlock looper.

Une étude des parasitoïdes des œufs et des larves de l’arpenteuse de la pruche (Lambdina fiscellaria (Guenée); Lepidoptera: Geometridae) a été entreprise pendant une infestation de ce ravageur au Labrador, Terre-Neuve-et-Labrador, Canada. Six espèces de parasitoïde ont été trouvées: Telenomus coloradensis Crawford et T. droozi Muesebeck (Hymenoptera: Platygastridae), Winthemia occidentis Reinhard et Blondelia eufitchiae (Townsend) (Diptera: Tachinidae), ainsi qu’une espèce de Phobocampe Förster et Mesochorus vittator (Zetterstedt) (Hymenoptera: Ichneumonidae). Aucune d’entre elles n’était nouvelle au Canada. Afin de mieux comprendre l’assemblage régional de parasitoïdes du Labrador, nous avons compilé toutes les espèces rapportées dans les publications au Canada, et examiné tous les spécimens conservés de la Collection nationale canadienne d’insectes, d’arachnides et de nématodes (Ottawa, Ontario, Canada). Cette liste complète aidera les chercheurs intéressés par les candidats potentiels pour le contrôle biologique de l’arpenteuse de la pruche.

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1 Corresponding author (e-mail: lucie.royer@canada.ca).

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Subject Editor: Dylan Parry

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References

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A review of known parasitoids of hemlock looper (Lepidoptera: Geometridae) in Canada and first records of egg and larval parasitoids in Labrador forests

  • Rachid Sabbahi (a1), Lucie Royer (a2), James E. O’Hara (a3) and Andrew M.R. Bennett (a3)

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