Asian Citrus Psyllid Detection in Marin County

Northern California

Due to an Asian citrus psyllid (ACP) detection in Novato, California, Marin County has been added to Zone 2 of the ACP Nursery Stock Regional Quarantine and Zone 7 of the ACP Bulk Citrus Regional Quarantine.

The ACP regional quarantine model went into effect at the beginning of 2018 to better protect California’s commercial citrus from Huanglongbing (HLB). In the ACP Nursery Stock Regional Quarantine, Zone 2 comprises counties that:

  • Are partially infested with ACP
  • Have geographical barriers between it and Zone 3
  • Have not had an HLB detection
  • Are not proximate to the Mexico border

In the ACP Bulk Citrus Regional Quarantine Map, Zone 7 comprises counties that:

  • Are partially infested with ACP
  • Have not had an HLB detection
  • Are not a contiguous citrus growing region
  • Are not proximate to the Mexico border

The ACP was detected on a residential property in the northeastern neighborhood of Novato. It is the first psyllid detected in Marin County. Agricultural officials have placed insect detection traps throughout the area to determine if this is a singular insect or one of a larger breeding population. Residents with a citrus tree within 50 meters of the site where the psyllid was trapped will be contacted by agriculture officials who will ask to treat the citrus host plant.

For questions regarding the quarantine regulations or map, please email Jennifer VanDyke at Jennifer.VanDyke@cdfa.ca.gov or Keith Okasaki at Keith.Okasaki@cdfa.ca.gov.

ACP Bulk Citrus Regional Quarantine
ACP Bulk Citrus Overview

ACP Nursery Stock Regional Quarantine
ACP Nursery Stock Overview


Asian citrus psyllids found in Fresno County


The California Department of Food and Agriculture’s Plant Pest Diagnostic Center (PPDC) has...
Read More

San Joaquin Valley

Tulare County Citrus Grower Meeting and ACP Update: Friday, May 20


Citrus growers and industry members with operations in Tulare County are invited to attend a...
Read More

San Joaquin Valley

Industry Members Encouraged to Increase Vigilance Following Recent ACP Detections


Following recent Asian citrus psyllid (ACP) detections in the Central Valley over the last few...
Read More

San Joaquin Valley

San Diego County Citrus Grower Meetings – April 27 and 30


Citrus growers and industry members in San Diego County are invited to attend an in-person San...
Read More

Southern California