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  ...