Turnip Gall Weevil
Ceutorhynchus assimilis
Conservation status data sourced from the IUCN Red List of Threatened Species.
Taxonomy & Classification
Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Coleoptera
Family
Curculionidae
Genus
Ceutorhynchus
Turnip Gall Weevil belongs to the family Curculionidae, order Coleoptera, within the Insecta class.
Species Profile
Species profile data sourced from the IUCN Red List of Threatened Species.
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.
Key Facts
Habitat & Distribution
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.
Threats
IUCN Red List: Critically Endangered
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.
Agricultural intensification and host plant elimination
Habitat fragmentation and loss
Pesticide and herbicide application
Climate change affecting host plant phenology
Reduced genetic diversity in isolated populations
Community Sightings
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Sources & Attribution
How to Cite
IUCN: IUCN (2025). The IUCN Red List of Threatened Species. Version 2025-1. Available at: https://www.iucnredlist.org. doi:10.2305/IUCN.UK.2025-1.RLTS
GBIF: GBIF.org (2025). GBIF Home Page. Available at: https://www.gbif.org
This page: SpeciesRadar (2025). Turnip Gall Weevil (Ceutorhynchus assimilis). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/turnip-gall-weevil