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,
- 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)