Evaluation of Ripening Indicators for Harvest-time Decision Making in Cold Climate Grape Production

Supplemental Table 1  Date of harvest and cumulative growing degree days (GDD; base temperature 10°C with an upper limit of 30°C) from 1 April until the date of harvest, harvest yield (kg/vine), and winter pruning weights (kg/vine; means ± SEM) in the 2017 and 2018 seasons for the grape cluster microclimate treatments (shaded and exposed) in the cold climate interspecific hybrid grape cultivars Brianna, Frontenac, La Crescent, Léon Millot, Maréchal Foch, Marquette, MN 1220, and Petite Pearl grown at the West Madison Agricultural Research Station in Verona, WI.

Supplemental Table 2   P value matrix for linear regression comparisons across treatments and years among each tested grape berry indicator for the grape cluster microclimate treatments (shaded and exposed) in the white cold climate interspecific grape cultivars Brianna, La Crescent, and MN 1220 grown at the West Madison Agricultural Research Station in Verona, WI during the 2017 and 2018 seasons. TA, titratable acidity.

Supplemental Table 3  P value matrix for linear regression comparisons across treatments and years among each tested grape berry indicator for the grape cluster microclimate treatments (shaded or exposed) in the red cold climate interspecific grape cultivars Frontenac, Léon Millot, Maréchal Foch, Marquette, and Petite Pearl grown at the West Madison Agricultural Research Station in Verona, WI during the 2017 and 2018 seasons. TA, titratable acidity.

Supplemental Figure 1   Monomeric anthocyanin (mg/L Mv-3-glc equiv) and tannin (mg/L (-) epicatechin equiv) concentrations (means ± SEM) across cumulative growing degree days (GDD, base temperature 10°C with an upper limit of 30°C) for the red cold climate interspecific hybrid grape cultivars Petite Pearl (A and C) and Frontenac (B and D) within two different grape cluster microclimate treatments (exposed or shaded) for the 2017 and 2018 seasons.

• Supplemental_Data.pdf