Skip to main content Skip to accessibility
This website is not compatible with your web browser. You should install a newer browser. If you live in Jersey and need help upgrading call the States of Jersey web team on 440099.
homegov.je

L'înformâtion et les sèrvices publyis pouor I'Île dé Jèrri

  • Choose the service you want to log in to:

  • gov.je

    Update your notification preferences

  • one.gov.je

    Access government and parish services

  • CAESAR

    Clear goods through customs or claim relief

  • Talentlink

    View or update your States of Jersey job application

Colorado beetle

The threat the Colorado beetle poses

The Colorado beetle presents an annual threat to potato production in Jersey via invasion from France. Under international plant health laws, both the UK and Jersey are 'protected zones' for this pest, meaning that it is not present in the area. Should Colorado beetle become established in Jersey, not only would it devastate the potato crop but it would affect the export of the crop to the UK. The Jersey Royal crop is worth approximately £22.5 million per year.

Monitoring during high risk periods

When certain climatic thresholds are reached, beaches and potato crops are inspected.

These include:

  • easterly winds exceeding 20 knots, which may carry the flying beetles across the sea to the Island
  • greater than 6 hours of direct sunshine
  • temperature exceeding 20°C
  • high climatic instability (thermal activity)
  • high beetle flight activity on the adjacent French coast

Through continued liaison with the French plant protection authorities and monitoring of suitable weather conditions, the system monitoring risk periods in Jersey from Colorado beetle continues to operate well.

Colorado beetle DEFRA leaflet

Back to top
rating button