National Clean Plant Network
National Clean Plant Network
National Clean Plant Network
University of California
National Clean Plant Network

Welcome to the National Clean Plant Network

NCPN Nat logo 150

The National Clean Plant Network (NCPN) was created to protect U.S. specialty crops such as grapes, fruit trees, citrus, berries, roses and sweetpotatoes from the spread of economically harmful plant pests and diseases. NCPN ensures the global competitiveness of U.S. specialty crop producers by creating high standards for our clean plant programs.

NCPN Impact


Yield Comparison of Clean vs. Virus-Infected Sweetpotato 

SP clean stock yield table

Clark, C.A. and Hoy, M.W. 2006. Effects of common viruses on yield and quality of Beauregard sweetpotato in Louisiana. Plant Dis. 90:83-88.







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NCPN LogoThe National Clean Plant Network (NCPN) produces and distributes asexually propagated plant material free of targeted graft transmissible plant pathogens to ensure the global competitiveness of specialty crop producers and to protect the environment. The NCPN operates under the auspices of three agencies within the United States Department of Agriculture - Animal and Plant Health Inspection Service (APHIS), Agricultural Research Service (ARS) and National Institute of Food and Agriculture (NIFA).



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