Nov 15, 2019

This is the most recent news about the status of Huanglongbing and Asian Citrus Psyllid in the San Luis Obispo, Santa Barbara and Ventura areas, as well as links to activities in the state.  Cressida Silvers is the local Grower Liaison for the Ca Dept of Food and Ag's Citrus Pest and Disease Prevention Program.

HLB Update

The most recent map and totals for all HLB detections in the state are posted at the website  As of November 1, a total of 1,665 trees and 264 ACP have tested positive for the bacterium that causes HLB, on a total of 1,197 sites, all still in LA, Orange, and Riverside Counties. To date, all HLB detections have been on residential properties, the infected trees have been or are being removed, and ACP treatments applied on a recurring basis to remaining citrus in those areas. No HLB has been found in commercial groves via PCR testing.


How Close Is HLB To Your Citrus? There's a New UC App For That! 

Visit , zoom to or type in your location and it shows your proximity to HLB+ detections, recommends best practices to protect your citrus from HLB based on your current proximity to known detections, and provides a link to the Voluntary Grower Response Plan for more information. As HLB detections via PCR increase and spread, it's important to be aware of possible actions you could take to further protect your citrus should an HLB detection occur in your area. 

Regulatory responses required by the state in response to an HLB detection are described in CDFA's Action Plan for ACP and HLB. 

 -- All meeting agendas and eventually the minutes are posted at . All meetings are free and open to the public, and accessible via phone/webinar.  

  • Operations Subcommittee meets Wednesday, November 6 at 9 a.m. in Visalia.
  • Science and Technology Subcommittee meets Wednesday, November 6 at 2:00 p.m. in Visalia.
  • The next CPDPC Full Committee meeting will be Tuesday, November 12 at 10 a.m. in Ventura.

CITRUS REMOVAL PROGRAM: Citrus trees that are neglected or abandoned may harbor ACP and HLB, increasing risk to other citrus in the area. Abandoned and neglected trees may be reported to me or the county Ag Commissioner's office. The Citrus Matters ACT NOW program may be able to assist in citrus removal. For more information contact Joel Reyes at or (559) 592-3790. 


Additional Useful Links:

Summaries of the latest scientific research on combating HLB:

Science-based analyses to guide policy decisions, logistics, and operations:

General updates and information on the state ACP/HLB program and regional activities:


Cressida Silvers

CA Citrus Pest and Disease Prevention Program

ACP/HLB Grower Liaison

Ventura, Santa Barbara and San Luis Obispo Counties

805 284-3310 (phone or text)


By Ben Faber
Author - Advisor

Attached Images: