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,