NCPN Grapes
NCPN Grapes
NCPN Grapes
University of California
NCPN Grapes

NCPN Grape News

Grapevine 'Variety Focus' Lectures Available for Viewing

Grapevine ‘Variety Focus' lectures are now available on Foundation Plant Service's website at These lectures, from 2005-2011, were given by a talented group of guest speakers including UC Davis faculty, UC farm advisors, experienced California growers and winemakers as well as guest speakers from the focus variety country of origin.

Posted on Wednesday, May 16, 2018 at 7:41 AM

Five Facts About Grape Viruses and NCPN-Grapes

Wine quality is affected by a very common disease, leafroll disease, which reduces sugar content and color of grapes and increases acidity. Leafroll disease is caused by one or more viruses in the grapevine leafroll virus species. Archived leaf tissue in the UC Davis Herbarium from the 1940s was found to be infected with the newly discovered (2012) Grapevine red blotch virus indicating that it has been around at least since then. Every year, over 100 grapevine selections are treated...

Posted on Saturday, January 6, 2018 at 12:58 PM

Grapes,NCPN Network News, Spring 2017

Rick Hamman

Rick Hamman, Viticulture Manager, Hogue Ranches, Prosser Washington “The National Clean Plant Network is a valuable resource for our wine industry of Washington and other areas of the PNW and the nation. Virus-clean grapevine material from the Clean Plant Center Northwest (CPCNW) has given the Washington wine industry a future and direction in battling the most significant disease (Grapevine leafroll) facing the industry. This is important to me and many others for the long-term...

Posted on Friday, June 16, 2017 at 11:12 AM

NCPN Network News Winter 2017 Grapes

Maher Al-Rwahnih enjoys showing off the 600 million reads he gets from the Next Seq 500 machine purchased with NCPN funds for use at Foundation Plant Services.

Dr. Maher Al-Rwahnih took over the reins as Diagnostic and Research Lab Director at Foundation Plant Services (FPS), UC Davis on July 1, 2016.  He also serves as vice chair of the NCPN-Fruit Tree Tier 2, is on NCPN-Roses Tier 2 and is actively involved in the NCPN-Sweetpotato virology committee.   Maher (pronounced Ma - her) originally hails from Jordan and spent time in Italy at the University of Bari and came to FPS in 2004 as a post-doc. We are very fortunate to have him in...

Posted on Monday, March 20, 2017 at 9:21 PM

NCPN Webinar Series: Clean Plants for the Future of the Eastern Wine and Grape Industry


The National Clean Plant Network for Grapes (NCPN-G) was established to improve the health and productivity of wine, juice, and table grape vineyards in the United States. Clean grapevines are the key to higher yields, higher quality fruit, and cost-effective, sustainable grape production. The five centers in the network represent grape growing regions across the country. In March 2016, a weekly webinar series entitled NCPN Webinar Series: Clean Plants for the Future of the Eastern Wine and...

Posted on Wednesday, May 18, 2016 at 11:23 AM

NCPN-Grapes Special Webinar on Grapevine Red Blotch, March 27, 2013

Click to view video. The National Clean Plant Network for Grapes is a body of industry members, experts in plant pathology, regulators and clean plant centers that were created to develop and provide healthy grapevine material to the grape industry in the United States. The headquarters of the NCPN Grapes is at Foundation Plant Services at the University of California, Davis.  FPS also manages the primary foundation vineyard for the...

Posted on Wednesday, March 27, 2013 at 2:29 PM

NCPN LogoThe National Clean Plant Network (NCPN) is a voluntary association of specialty crop networks that have joined to promote the use of pathogen-tested, healthy plant material for food crops in the United States. 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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