Interim Progress Report Sample Contracts
California Department of Food and Agriculture - Interim Progress Report CDFA Agreement Number 17-0416-000-SAInterim Progress Report • February 16th, 2018
Leafroll is one of the most devastating and widespread viral diseases of grapevines. It reduces yield, delays fruit ripening, increases titratable acidity, lowers sugar content in fruit juices, modifies aromatic profiles of wines, and shortens the productive lifespan of vineyards (Almeida et al. 2013, Naidu et al. 2014). The economic cost of leafroll is estimated to range from $12,000 to $92,000 per acre in California (Ricketts et al. 2015) and from $10,000 to $16,000 in New York (Atallah et al. 2012).
California Department of Food and Agriculture - Interim Progress Report CDFA Agreement Number 16-0615-SAInterim Progress Report • September 10th, 2021
Red blotch was described for the first time on Cabernet Sauvignon at the UC Oakville Research Field Station in 2008 (Calvi 2011; Sudarshana et al., 2015). Diagnosis based on symptoms can be challenging because of several confounding factors, including striking similarities between foliar symptoms elicited by red blotch and leafroll diseases, as well as several other biotic and even abiotic factors. Because symptom variation makes visual diagnosis of diseased vines difficult, only DNA-based assays are reliable for accurate diagnosis (Sudarshana et al., 2015).
California Department of Food and Agriculture - Interim Progress Report CDFA Agreement Number 17-0517-000-SAInterim Progress Report • February 13th, 2018
Red blotch was described for the first time on Cabernet Sauvignon at the UC Oakville Research Field Station in 2008 (Calvi 2011; Cieniewicz et al., 2017a; Sudarshana et al., 2015). Diagnosis based on symptoms can be challenging because of several confounding factors, including striking similarities between foliar symptoms elicited by red blotch and leafroll diseases, as well as several other biotic and even abiotic factors. Because symptom variation makes visual diagnosis of diseased vines difficult, only DNA-based assays are reliable for accurate diagnosis (Cieniewicz et al., 2017a; Sudarshana et al., 2015)
California Department of Food and Agriculture - Interim Progress Report CDFA Agreement Number 16-0615-SAInterim Progress Report • April 2nd, 2018
Red blotch was described for the first time on Cabernet Sauvignon at the UC Oakville Research Field Station in 2008 (Calvi 2011; Sudarshana et al., 2015). Fruit ripening issues have been documented with diseased wine grapes. Reductions of 1-6°Brix have been consistently reported, as well as lower berry anthocyanin and skin tannins, particularly in red wine grapes such as Cabernet franc and Cabernet Sauvignon (Calvi 2011; Sudarshana et al., 2015). Based on the effect of the virus on fruit quality and ripening, numerous vineyard managers are culling infected vines and replacing them with clean, virus- tested ones. The economic cost of GRBV is estimated to range from $21,833 (for a 5% initial infection in year 3 and a 25% price penalty for infected grapes) to $169,384 (for a 60% initial infection in year 3 and a 100% price penalty for the proportion infected grapes) per acre in Napa Valley; from $12,023 to $93,067 per acre in Sonoma; and from $5,468 to $39,140 per acre in New York (Ricket