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

NCPN News Across the Network

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 working in infected yards, to preclude transferring pests and other vectors between...

Posted on Saturday, January 6, 2018 at 1:00 PM

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...

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

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. In the fall, collect 8-10 inch one-year-old branches of the current season's growth, including the...

Posted on Saturday, January 6, 2018 at 12:57 PM

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 vectored by the Asian citrus psyllid (ACP), Diaphorina citri. NCPN-citrus has grown to include 10...

Posted on Saturday, January 6, 2018 at 12:51 PM

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 with history of soil-borne viruses. Avoid areas with high incidence of pollen-borne virus. You cannot...

Posted on Saturday, January 6, 2018 at 12:39 PM

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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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