[2] It is now more widely distributed in North America, especially in regions growing rapeseed (canola) where it is regarded as an important invasive pest.

[3] The adults of Ceutorhynchus obstrictus are 2.5–4 mm long, dark grey to black and covered with fine white scales.

After migrating to canola fields, the adults feed again, mate and females start laying eggs into the developing seed pods.

Upon completing their development, the larvae chew an exit hole through the wall of the seedpod, drop to the ground and pupate in the soil, about 1–2 cm below the surface.

In autumn, they migrate to a hibernation site, for example a shelterbelt at the edge of the field, where they spent the winter in the soil or under litter on the ground.

In North America, infestations often exceed 25% of the rapeseed/canola pods having exit holes and yield losses on canola have been estimated at 5-30%.

In Europe many natural enemies like parasitoids and predators of C. obstrictus are known, but in North America, relatively few efforts have been directed at classical biological control, that is the collection of suitable strains of parasitoids and predators in Europe and their release in North America.