Welcome to the California Citrus Improvement Program
The Citrus Research Program -- officially, the California Citrus Improvement Program -- is the grower-funded and grower-directed program established in 1968 under the California Marketing Act as the mechanism enabling the state’s citrus producers to sponsor and support needed research. The program is administered by the Citrus Research Board, which is better known in the industry as simply “CRB.”

There are three components to the Program:

  • General research
  • Quality assurance (CCQC)
  • Variety improvement and registration (Citrus Clonal Protection Program)


  • Concerning this website...
    Technical difficulties since late June have required that this site be taken offline periodically, and updates could not be posted.  Certain sections are now undergoing reconstruction and are not fully functional, and we apologize.  Please note that CRB meeting information is also posted on the CDFA Marketing Branch website at www.cdfa.ca.gov

    Asian Citrus Psyllid in California
    Over the Labor Day weekend, it was confirmed that the Asian citrus psyllid has invaded California.  On Friday, August 29th, CDFA and USDA announced that a single ACP had been found in a trap in a lemon tree in the Sweetwater Reservoir area of San Diego about 11 miles north of the border with Mexico.  The delimitation survey that followed has found multiple populations of the insect at multiple sites in the area.  The citrus industry in California has been on high alert since June when ACP populations were discovered in Tijuana, Mexico.  An aphid-sized insect, the Asian citrus psyllid is of grave concern because it is a very efficient vector of the catastrophic citrus plant disease Huanglongbing, otherwise known as HLB or citrus greening, which is literally a death sentence for citrus trees.  The Citrus Research Board has had a public education and outreach program in place for several months, enlisting the help of the general public in scouting for both the insect and the disease.  View additional information and download materials at www.californiacitrusthreat.com and find updates on the San Diego situation at www.cdfa.ca.gov/phpps/acp/.

    Hearing on Proposed Major Amendments to the Program

    At the request of the California Citrus Research Board and on behalf of the California Citrus Research Program, the California Department of Food and Agriculture (CDFA) will hold a public hearing to take testimony on proposed major amendments to the California Citrus Research Program.  Two amendments to the marketing order are proposed.  One would add language dealing with Pest and Disease Control, and the second would raise the cap for the maximum allowable assessment rate.  All growers of record have been notified by mail.  The hearing is set for 10:00 A.M. on Thursday, Sept. 18, 2008, at the Tulare County Agricultural Building, 4437 South Laspina Street, Tulare. 

    [Hearing Notice]   [Proposed Amendments]



    CRB General Research
    The Citrus Research Board provides funding for research in six general areas -- plant management and physiology, plant improvement (which includes breeding and genetics), plant pathology, entomology, exotic pests, and postharvest studies.  Research priorities are reevaluated each year for their validity in addressing both the near-term and the long-range needs of the industry.

    2008-2009 Request for Proposals

    The Citrus Research Board will change the process for receiving new proposals for the coming fiscal year to allow the Board to adequately fund current projects in a short crop year.  The Board will accept proposals from existing projects, some selected projects from last year's applications, and proposals that meet the new guidelines from USDA-CSREES (Specialty Crops Farm Bill) that require matching funds from non-Federal sources. 

    [Announcement]  [Instructions]  [Form]



    Basics of Good Agricultural Practices for Citrus Growers
    Food safety begins in the grove.  This information is designed to encourage growers of fresh citrus to learn more about what it takes to have a food safety management plan for their operations.  In this introductory overview, producers will find the basics needed to plan, execute and document cultural practices that will lessen possibilities of fruit contamination.  Growers are strongly encouraged to delve deeper into this important subject.  CRB will be assisting in this process with periodic updates and advanced guidance documents in the coming months.

    [More Info].[Forms]



    California Citrus Quality Council

    The quality assurance portion of the California Citrus Improvement Program is conducted by the California Citrus Quality Council (CCQC) under an operating agreement with the Citrus Research Board. CCQC furnishes California citrus growers and their shippers with technical information and procedural guidance to assure the marketing of citrus fruit that complies with the chemical residue, food safety, phytosanitary and labeling requirements of the U.S. and all importing countries.

    [ More Info ]



    Citrus Clonal Protection Program (CCPP)
    The Citrus Clonal Protection Program operates specifically for the purpose of eliminating the spread of bud-transmitted pathogens in citrus by providing variety improvement through importation, indexing and certification of budlines, by the direct elimination of pathogens from infected budlines, and by the maintenance, evaluation and registration of budwood source trees. The CCPP program is maintained jointly by the Citrus Research Board and the University of California in cooperation with the California Department of Food and Agriculture and USDA.

    [ More Info ]



    Funded Researchers
    We have compiled a list of email addresses for funded researchers. [Show Details]


    Administering the Citrus Research Program
    Under authority of the Secretary of Food and Agriculture, State of California

    Copyright© 2005 - Citrus Research Board
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