Posts Tagged: Asian Citrus Psyllid
Invasive Spotlight: Asian Citrus Psyllid and Huanglongbing Disease
The Asian Citrus Psyllid (ACP) is a small, aphid-sized insect that poses a serious threat to...
ACP Updates
Asian Citrus Psyllid Update
Winter and spring rains have given us a robust growing season this year. Tender new citrus flush is ideal habitat for ACP to feed, lay eggs and build new populations. An increase in ACP numbers and feeding can increase the risk of HLB spreading and building up. University of California recommends growers monitor trees regularly for ACP, paying careful attention to new flush, and treat when populations reach the detection threshold. The UC IPM website lists a range of materials effective against ACP, including organic options. Growers are also encouraged to work with a pest management professional to better detect and manage ACP.
Advanced notification of nearby beekeepers is required before pesticide treatments. Use the BeeWhere BeeCheck system, or contact the County Agricultural Commissioner's office, 805-681-5600, for more information. Always follow label instructions for bee safety.
If your citrus is no longer being cared for or is not worth the resources required to protect it from ACP and HLB, consider removing it.
HLB Quarantine Update
As of May 5, a total of 5.007 trees and 709 ACP have been confirmed positive for the bacterium that causes HLB. Trees confirmed positive are treated for ACP and removed, and the HLB quarantine may be expanded. Additional ACP treatments and HLB detection surveys are conducted on a recurring basis to remaining citrus within 250 meters of each detection.
Counties where HLB has been detected via PCR testing are Los Angeles, Orange, San Diego, Riverside, San Bernardino and San Diego, with the majority of detections in Orange County. To see a map of the current HLB quarantine areas, and other details of locations and numbers of HLB detections, please visit maps.cdfa.ca.gov/WeeklyACPMaps/HLBWeb/HLB_Treatments.pdf.
HLB Detection Response Guide for Growers
To ensure California citrus growers are well prepared in the event of a potential commercial grove detection of Huanglongbing (HLB), the Citrus Pest and Disease Prevention Program (CPDPP) has developed the Response Guide for a Confirmed HLB Positive Detection in a Commercial Grove, which details the steps taken by CDFA and actions required of the property or grove owner, as outlined in CDFA's Action Plan and Information for Citrus Growers/Grove Managers.
Citrus Pest and Disease Prevention Committee Meetings -- Webinar and In Person
All meeting agendas and eventually the minutes are posted at www.cdfa.ca.gov/citrus committee/. The 2022-23 schedule for the Full Committee is here, and the schedule for Subcommittees is here.
Upcoming Meetings
- Operations Subcommittee, Wednesday May 10 at 9 am (agenda and webinar link)
- Outreach Subcommittee, Wednesday May 10 at 1:30 pm (agenda and webinar link)
- CPDPP Full Committee, Wednesday August 9 (agenda pending)
All meetings are free and open to the public to listen to or make public comment. Meetings are currently in person and accessible via phone and/or webinar. Links to register for and join meetings are included in agendas when posted.
For a list of current committee members, click here.
Additional ACP/HLB Resources
- CDFA Citrus Division website: https://www.cdfa.ca.gov/Citrus/
- General ACP/HLB
oInformation on the state ACP/HLB program including maps, quarantine information, and a signup option for email alerts: citrusinsider.org/
oBiology of ACP and HLB, detection maps and recommendations for monitoring, eradication and management: ucanr.edu/sites/acp/
oUC IPM recommendations for ACP insecticides
oWeb-based map to find out how close you are to HLB: ucanr.edu/hlbgrowerapp
oVideo on Best Practices in the Field, available in English and Spanish
oSpanish-only ACP/HLB presentation video presentation and audio-only recording.
- Research
oLatest Science Advisory Panel Report
oUC Ag Experts Talk presentations on management of various citrus pests and diseases are available for viewing here and here on YouTube.
oSummaries of the latest research to combat HLB: ucanr.edu/sites/scienceforcitrushealth/
oScience-based analyses to guide policy decisions, logistics, and operations: www.datoc.us
- Regulatory/Quarantine
oSign up for program updates from the Citrus Pest and Disease Prevention Division at www.cdfa/signup-email-updates.
oRegulatory requirements for moving bulk citrus: Information for Citrus Growers
oSummary of regulatory requirements in the event of an HLB detection in commercial citrus: citrusinsider.org/Regulatory-Flyer
oSanta Barbara County Ag Commissioner's Office
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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)
acp (2)
ACP and Biological Control
Two DPR CE unit (other) and two CCA CE unit (IPM) are pending.
Just as a reminder, here are the requirements for receiving the CEUs:
-register separately with your own name and email address and log in from your own device
-participate in the entire session
-complete and pass a final test with 70% or higher; if not passed, the test can be retaken
If you are not familiar with Zoom, log in a few minutes early to familiarize yourself with the Zoom interface.
. Registration information is at:
https://ucanr.zoom.us/webinar/register/WN_w0BKQR7YQ_-_IzAn29KW-g
ACP and nypmphs
ACP/HLB Updates for SLO, Santa Barbara and Ventura Cos
SANTA BARBARA COUNTY CITRUS UPDATES
ACP Update
The next Area Wide Management coordinated grower treatment window will be in January. Be sure to renew permits as needed with the County Agriculture Department. Growers are also encouraged to work with your pest management professionals to stay vigilant with regular monitoring of your trees for ACP, especially young trees and along grove perimeters. Research shows that in generally infested areas like Santa Barbara County, keeping ACP populations low reduces the risk of citrus trees acquiring the bacteria that causes the deadly HLB disease.
Please consider removing citrus that is no longer being cared for or is not worth the resources required to protect it from ACP & HLB.
Biological Control Releases
Monthly releases of the ACP biological control agent Tamarixia radiata continued in October in residential areas of Santa Maria, Guadalupe, and Orcutt in the northern part of the county, and to the south in Goleta, Santa Barbara, Montecito, Summerland and Carpinteria.
En Español -- Spanish Language ACP/HLB Presentations
Las grabaciones de video y solamente audio están disponibles a continuación para nuestras presentaciones en español ACP / HLB desde el 27 de septiembre de 2022. Francisco Macías, asesor local de control de plagas, dio una presentación general sobre ACP y HLB, y Rafael Raygoza de la oficina agrícola del condado de Ventura presentó sobre las inspecciones. El evento fue moderado por Maureen McGuire de la Oficina Agrícola del Condado de Ventura y el Grupo de Trabajo ACP / HLB. Muchas gracias a nuestros presentadores y moderador por proporcionar esta valiosa información en español.
Video and audio-only recordings are available below for those who missed our Spanish language ACP/HLB presentations on September 27, 2022. Francisco Macias, a local pest control advisor, gave a general presentation on ACP and HLB, and Rafael Raygoza with the Ventura County Agricultural office presented on inspections. The event was moderated by Maureen McGuire from the Ventura County Farm Bureau and ACP/HLB Task Force. Muchas gracias to our presenters and moderator for providing this valuable information in Spanish.
HLB Quarantine Update
As of October 28, a total of 3,942 trees and 501 ACP have tested positive via PCR for the bacterium that causes HLB. Trees that test positive are treated for ACP and removed, and the HLB quarantine may be expanded. Additional ACP treatments and HLB detection surveys are conducted on a recurring basis to remaining citrus within 250 meters of each detection.
Counties where HLB has been detected via PCR testing are Los Angeles, Orange, San Diego, Riverside, San Bernardino and San Diego, with the majority of detections in Orange County. Recent expansions of the HLB quarantine occurred in Riverside and Orange counties. To see a map of the current HLB quarantine areas, and other details of locations and numbers of HLB detections, please visit maps.cdfa.ca.gov/WeeklyACPMaps/HLBWeb/HLB_Treatments.pdf.
To help you prepare for the regulatory impacts of HLB, please refer to CDFA's Information for Citrus Growers/Grove Managers, Action Plan for ACP and HLB or this summary flier for information on regulatory and treatment requirements growers can expect when HLB is detected in or near your citrus grove or packing house.
Upcoming CPDPC Meetings -- Webinar and In Person
All meeting agendas and eventually the minutes are posted at www.cdfa.ca.gov/citrus committee/. All meetings are free and open to the public to listen to or make public comment. Meetings are currently in person and accessible via phone and/or webinar. Links to register for and join meetings are included in agendas when posted.
- The Nov 2 Operations Subcommittee has been cancelled.
- Outreach Subcommittee, November 2 at 1:30 pm. Agenda and instructions to join are here.
- Finance Subcommittee, November 8 at 9 am. Agenda and instructions to join are here..
- CPDPC Full Committee, November 9 at 10 am. Agenda and instructions to join are here. .
For a list of current committee members, click here.
Additional ACP/HLB Resources
- CDFA Citrus Division website: https://www.cdfa.ca.gov/Citrus/
- General ACP/HLB
oInformation on the state ACP/HLB program including maps, quarantine information, and a signup option for email alerts: citrusinsider.org/
oBiology of ACP and HLB, detection maps and recommendations for monitoring, eradication and management: ucanr.edu/sites/acp/
oUC IPM recommendations for ACP
oWeb-based map to find out how close you are to HLB: ucanr.edu/hlbgrowerapp
oVideo on Best Practices in the Field, available in English and Spanish
- Research
oUC Ag Experts Talk presentations on management of various citrus pests and diseases are available for viewing here and here on YouTube.
oSummaries of the latest research to combat HLB: ucanr.edu/sites/scienceforcitrushealth/
oScience-based analyses to guide policy decisions, logistics, and operations: www.datoc.us
- Regulatory/Quarantine
oSign up for program updates from the Citrus Pest and Disease Prevention Division at www.cdfa/signup-email-updates.
oRegulatory requirements for moving bulk citrus: Information for Citrus Growers
oSummary of regulatory requirements in the event of an HLB detection in commercial citrus: citrusinsider.org/Regulatory-Flyer
oSanta Barbara County Ag Commissioner's Office
--------
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)
HLB symptoms
Asian citrus psyllid study: Vigilance urged but ‘no cause for panic’
Preliminary results indicate 3.5% of ACP collected showed signs of bacterium that can cause huanglongbing
An ongoing study in the commercial citrus groves of coastal Southern California is looking at whether Asian citrus psyllids – the insect vector of huanglongbing “citrus greening” disease – are carrying the bacterium that can cause HLB.
Thus far, the project has tested more than 3,000 adult ACP collected from 15 commercial citrus sites across the region, of which 138 – just over 3.5% – had some level of the bacterium present, according to researchers from UC Agriculture and Natural Resources, UC Davis, UC Riverside and the University of Arizona, Tucson.
“While the results are a cause for concern, the situation in California is much better than in Florida and Texas, where ACP carrying the bacterium make up the majority of the population and HLB is widespread in commercial citrus,” said Neil McRoberts, a UC Davis plant pathologist and UC Integrated Pest Management program affiliate advisor. “The results indicate that there is no room for complacency, but also no cause for panic.”
Since the first HLB-infected tree in California was found in 2012, nearly 4,000 infected trees have been detected and removed from residential properties in Southern California, mainly in Orange and Los Angeles counties. According to McRoberts, “to date, no HLB has been found in commercial citrus” in California.
He stressed, however, that the aforementioned ACP study – funded by the HLB Multi Agency Coordination Group and managed by USDA-APHIS – does not involve any testing of trees for HLB and focuses only on looking at the insect which spreads the bacterium.
McRoberts also emphasized that the project's detections of the bacterium cannot be considered “official” because the researchers' lab procedures differ from the official testing protocols of the California Department of Food and Agriculture.
“Follow-up sampling by CDFA staff would allow official samples to be collected for further investigation, but is entirely voluntary for the growers involved,” he said, adding that his research team is currently wrapping up the sampling phase of the project, with data analysis continuing into 2023.
While commending the “huge coordinated effort” by the California citrus industry, California Department of Food and Agriculture, UC ANR and other partners to suppress the ACP vector and slow the spread of HLB, McRoberts also urged continued vigilance.
“Our study results indicate that it is not time to declare the emergency status for ACP/HLB in California over – the situation is still evolving,” he said.
For further information about the research, contact Neil McRoberts at nmcroberts@ucdavis.edu or (530) 752-3248.