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NCPN Citrus
NCPN Citrus
NCPN Citrus
University of California
NCPN Citrus

California, Citrus Clean Plant Network

The California Citrus Clonal Protection Program (CCPP) has its roots in the 1930s when the original discovery of the viral nature of the graft-transmissible disease citrus psorosis by Dr. H. Fawcett at the University of California Citrus Experiment Station in Riverside triggered the establishment of the “Psorosis Free Program.” Today CCPP stands as a cooperative program between the University of California Riverside (UCR, Department of Plant Pathology & Microbiology), the California Department of Food and Agriculture (CDFA), the United States Department of Agriculture’s Animal and Plant Health Inspection Service (USDA-APHIS), and the citrus industry of the state of California represented by the California Citrus Nursery Board (CCNB) and the Citrus Research Board (CRB).

The purpose of the CCPP is to provide a safe mechanism for the introduction into California of citrus varieties from any citrus-growing area of the world for research, variety improvement, or for use by the commercial industry of the state. The introduction mechanism includes disease diagnosis and pathogen elimination followed by maintenance and distribution of true-to-type primary citrus propagative material of the commercially important scion and rootstock varieties.

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Webmaster Email: jsjacobs@ucdavis.edu