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

NCPN Newsletters

Latest Newsletter: In-Depth Look at NCPN Crops Continues

2018 May Sweetpotato Feature Cover
NCPN-Sweetpotato Hits the Ground Running!

Sweetpotatoes joined the National Clean Plant Network (NCPN) in 2015 and participants have made huge strides in a short amount of time.

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Current Stories from Around the Network

NCPN Grape News

Grapevine 'Variety Focus' Lectures Available for Viewing

Grapevine ‘Variety Focus' lectures are now available on Foundation Plant Service's website at  http://fps.ucdavis.edu/VarietyFocus.cfm. These lectures, from 2005-2011, were given by a...

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...

NCPN Hops News

Field Guide Integrated Pest Management in Hops

Start clean by purchasing virus tested hops for your yard and stay clean by following best management practices outlined in the link below. https://www.usahops.org/cabinet/data/Field-Guide.pdf

Tips for Managing Hop Viruses in the Field

Plant with propagation material that is virus indexed. Destroy and replace diseased plants with virus-indexed plants as soon as possible to limit spread. Start work in virus-indexed yards before...

NCPN Berries News

  • Five Tips for Safeguarding Berry Farms from Virus Disease

    Plant resistant varieties where available. Never propagate from material that has not been virus-tested. Know the viruses that circulate in your area and their vectors. Never plant in fields...

  • Berries, NCPN Network News, Spring 2017

    John Clark

    John R Clark, Distinguished Professor, University of Arkansas “Back in the early to mid-2000s, two major developments occurred that impacted blackberry production, particularly in the South...

NCPN Roses News

  • Article available: What is Rose Rosette Disease?

    New open access article on RRD published by HortScience: What is Rose Rosette Disease?  http://hortsci.ashspublications.org/content/53/5.toc  

  • Rose Rosette Disease Video Available

    View the 'What Wednesday' video clip on Rose Rosette disease: https://www.facebook.com/ TXPlantClinic/videos/ 10154736863317558/   Are you aware there is a website dedicated to Rose Rosette...

NCPN Citrus News

Dr. Georgios Vidalakis Awarded APS Excellence in Regulatory Affairs and Crop Security

Georgios Vidalakis, chair of NCPN-Citrus, has been recognized by the American Phytopathological Society for his outstanding contributions to regulatory plant pathology and crop security....

Five Important Facts About Diseases in Citrus

The citrus industry worldwide is being challenged by the spread of Huanglongbing (HLB), a graft-transmissible disease associated with species of the bacterium Candidatus Liberibacter, which is...

NCPN Sweet Potato News

Video on Virus Elimination Therapy

"Excising sweetpotato microshoot tips for virus elimination therapy” is now available on YouTube. https://www.youtube.com/watch?v=ShvNqgbPSiE

Five Terms Defined for Sweetpotato Clean Plant Programs

Virus indexing is a method used to determine the presence and identity of sweetpotato viruses.  The Brazilian morning glory (Ipomoea setosa), a close relative to sweetpotato, is sensitive to...

NCPN Fruit Tree News

Breeding for Disease Resistance

RosBREED is a national research and extension team focused on targeting breeding approaches in Rosaceae crops for disease resistance, horticultural quality and increased consumer satisfaction. Learn...

Five Tips for Preparing Fruit Tree Samples for Lab Virus Testing

Virus distribution changes with the seasons. In the winter, collect 8-10 inch one-year-old dormant bud sticks. In the summer collect flowers and leaf bud sticks from all major scaffolds and limbs....

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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