Canadian Forest Service Publications

Collapse of hemlock looper outbreaks: key role of Telenomus. 2004. Hébert, C. Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, Ste-Foy, Québec. Branching out, Number 13. 2 p.

Year: 2004

Issued by: Laurentian Forestry Centre

Catalog ID: 25080

Language: English

Series: Branching Out (LFC - Québec)

Availability: PDF (download)

Mark record


The hemlock looper is an important defoliator of balsam fir and outbreaks of this pest can build up very rapidly. Trees that sustain severe damage may die within a season. Researchers at the Laurentian Forestry Centre of the Canadian Forest Service have found a direct link between the activity of Telenomus, parasitoids of the hemlock looper, and the collapse of an outbreak of this pest.

Also available under the title:
Déclin des épidémies d'arpenteuse de la pruche : Rôle clé des Telenomus. L’éclaircie du Service canadien des forêts, Centre de foresterie des Laurentides. No. 13. (French)