Landscape effects on the cabbage seedpod weevil, Ceutorhynchus obstrictus, on canola in Quebec (Canada)

Abstract: The exotic pest Ceutorhynchus obstrictus accidentally introduced in 1931 in North America is one of the main pests of canola crops. The objective of the present study is to evaluate the influence of landscape predictors on C. obstrictus infestation in Quebec. Fieldwork has been conducted in 140 canola fields across eight Quebec regions from 2015 to 2020. Results show that pest infestation increases when proportions of roads and cereals are higher in the landscapes surrounding canola crops.