Seasonal parasitism of hemlock looper (Lepidoptera: Geometridae) eggs in eastern Canada

Abstract A 2-year field study was conducted using sentinel traps to determine the seasonal distribution of the egg parasitoid (Hymenoptera) complex attacking hemlock looper, Lambdina fiscellaria (Guenée), throughout eastern Quebec and western Newfoundland. Hemlock looper populations remained low in...

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Bibliographic Details
Published in:The Canadian Entomologist
Main Authors: Carleton, Drew, Royer, Lucie, Hébert, Christian, Delisle, Johanne, Berthiaume, Richard, Bauce, Eric, Quiring, Dan
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 2009
Subjects:
Insect Science
Molecular Biology
Physiology
Ecology, Evolution, Behavior and Systematics
Structural Biology
Canada
Crawford
Newfoundland
Online Access:http://dx.doi.org/10.4039/n09-040
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0008347X0000081X
Description
Summary:Abstract A 2-year field study was conducted using sentinel traps to determine the seasonal distribution of the egg parasitoid (Hymenoptera) complex attacking hemlock looper, Lambdina fiscellaria (Guenée), throughout eastern Quebec and western Newfoundland. Hemlock looper populations remained low in all areas over the course of the study. Parasitism of eggs in sentinel traps was generally lower in fall than in spring. Trichogramma Westwood (Trichogrammatidae) as well as Telenomus flavotibiae Pelletier and an unidentified species of Telenomus Haliday (Scelionidae) only parasitized eggs in the fall. Telenomus droozi Muesebeck only parasitized eggs in the spring, whereas T. coloradensis Crawford attacked eggs during both fall and spring. Telenomus coloradensis was the most abundant parasitoid species collected and was far more abundant in spring than in fall collections.

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