Citrus Clonal Protection Program

Fawcett of the Citrus Experiment Station at Riverside. That discovery triggered the establishment of the Psorosis Freedom Program in 1937. In 1957, the Citrus Variety Improvement Program was inaugurated and it was later renamed to Citrus Clonal Protection Program (CCPP). Today the CCPP stands as a cooperative program with the University of California, Riverside (UCR)-Department of Plant Pathology and Microbiology, the California Department of Food and Agriculture (CDFA), the United States Department of Agriculture 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). Since 2009, the CCPP has been a part of the National Clean Plant Network (NCPN) for specialty crops.