Canadian Forest Service Publications

The sawfly is zigzagging its way across elm leaves. 2021. Martel, V. NRCan, CFS, Laurentian Forestry Centre, Québec, QC. Branching Out from the Canadian Forest Service, Laurentian Forestry Centre. No. 126. 2 p.

Year: 2021

Issued by: Laurentian Forestry Centre

Catalog ID: 40325

Language: English

Series: Branching Out (LFC - Québec)

Availability: PDF (download)

Mark record


A species is classified as “exotic” if it is found outside its natural distribution area. Whether it is an insect, a plant, a fungus, or an animal, this exotic newcomer will be considered a pest if it disrupts the ecology of its new environment, threatens its ecosystem, or has an economic impact. The introduction of exotic species by sea, land, or air is often accidental. How then does the Canadian Forest Service (CFS) prepare for the accidental arrival of such pests as the elm zigzag sawfly?

Also available under the title:
Sur les feuilles de l’orme zigzague la tenthrède. L’éclaircie du Service canadien des forêts, Centre de foresterie des Laurentides. No. 126. (French)