Turnip Gall Weevil
CR

Turnip Gall Weevil

Ceutorhynchus assimilis

Unknown

Photo: Photo: (c) Mark Gurney, some rights reserved (CC BY-SA)

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

The Turnip Gall Weevil faces severe population declines due to intensive agricultural practices that eliminate its host plants and breeding sites. Widespread pesticide use in agricultural areas directly kills adults and larvae, while habitat fragmentation isolates remaining populations and reduces genetic diversity.

Threat summary

Habitat

Agricultural margins, field edges, and disturbed ground where cruciferous plants including wild turnip, oilseed rape, and related Brassicaceae species grow. The species requires areas with sufficient host plant density for gall formation and overwintering sites in nearby soil or plant debris.

Other threatened species in Curculionidae

strandsenapvivelCR

strandsenapvivel

Ceutorhynchus scapularis

Unknown
VU

gulsporresmalvivel

Mecinus heydeni

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Teplouchovs bastborre

Carphoborus teplouchovi

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lusernvivel

Sitona humeralis

Unknown

Frequently asked questions

Why is Turnip Gall Weevil classified as Critically Endangered?
Turnip Gall Weevil is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. The Turnip Gall Weevil faces severe population declines due to intensive agricultural practices that eliminate its host plants and breeding sites. Widespread pesticide use in agricultural areas directly kills adults and larvae, while habitat fragmentation isolates remaining populations and reduces genetic diversity.
Where does Turnip Gall Weevil live?
Turnip Gall Weevil occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Turnip Gall Weevil?
The main threats to Turnip Gall Weevil are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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