NCPN Grapes
NCPN Grapes
NCPN Grapes
University of California
NCPN Grapes

Economic Benefits

The economic benefits of planting a vineyard with clean grape material has been studied and found to be enormous.

  • Estimated costs of grapevine red blotch disease were estimated to be as high as $1,100/acre/year in 2015 dollars (or about $68,548 per hectare over a 25 year lifespan of a vineyard) in Napa County, California using a scenario of high initial infection and high quality penalty. If disease prevalence is low to moderate (below 30%), roguing symptomatic vines and replanting with clean vines should minimize losses. A full vineyard replacement should be pursued if disease incidence is higher (generally above 30%) (Ricketts et al., 2017).
  • Estimated costs of leafroll disease with no disease control ranged from $29,902 to $226,405 per hectare over a 25-year lifespan of a vineyard in California. If disease prevalence is between 5 and 10%, roguing symptomatic vines,
    replanting with certified vines, and controlling for mealybugs can minimize losses to leafroll (Ricketts et al. 2015)
  • Grower costs and benefits from using GLRaV-3-free vines were computed and extrapolated to the North Coast winegrape industry as a whole. Economic benefits from the GLRaV-3 testing, therapy, and distribution programs were in excess of $20 million/yr for
    the region and substantially outweighed the costs. (Fuller et al. 2019)

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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