Huanglongbing (HLB) Citrus Quarantine

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Map of HLB Quarantine Area

The California Department of Food and Agriculture (CDFA) has established a citrus quarantine area that includes portions of Redlands after a citrus tree located in the City of Colton tested positive for Huanglongbing (HLB) in January 2020. The 5-mile HLB quarantine area affects all commercial citrus groves (defined as any parcel with 25 or more citrus trees).

The quarantine prohibits the movement of all citrus nursery stock or plant parts out of the quarantine area. Provisions exist to allow the movement of commercially cleaned and packed citrus fruit. If you are a grower within the new quarantine expansion area, please contact CDFA’s emergency quarantine response program at 916-654-0312 for information on these provisions.

Fruit that is not commercially cleaned and packed, including residential citrus, such as oranges, lemons, grapefruits, and kumquats, must not be moved from the property on which it is grown, although it may be processed and/or consumed on the premises.

The quarantine boundaries in Redlands are as follows:

5th street in San Bernardino on the north side of the wash, south on Alabama street to Lugonia Avenue, east to Tennessee street, south (which Tennessee street turns into San Mateo street) to Highland Avenue, east to San Jacinto street, south to W. Crescent Avenue, east to Alessandro road, south into San Timoteo Canyon.

Residents are urged to take several steps to help protect citrus trees:

  • Spray the citrus trees on residential property.
  • Within quarantine areas consume home-grown citrus fruit at home and do not transport home-grown citrus or citrus plants out of the area.
  • Do not move citrus plants, leaves, or foliage into or out of the quarantine area or across state or international borders. Keep it local.
  • Cooperate with agricultural officials placing traps, inspecting trees, and treating for the pest.
  • If you no longer wish to care for your citrus tree, consider removing it so it does not become a host to the pest and disease.