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2010 Winegrape Field Testing for Harvest
University of Vermont (UVM) Vineyard
UVM Horticulture Research Center, South Burlington,
VT
Each cultivar in the vineyard was sampled weekly to assess berry maturity and determine harvest readiness. This field testing began following veraison and as each cultivar was approaching harvest. Notes on Methods: Ten berries were removed from each of the six, 4-vine replicates (‘panels’) per cultivar for a target total of 60 berries per cultivar. Berries were selected from random clusters evenly distributed within the panel, from the middle of any cluster’s length, from both sides of the row, and from locations with various aspects of sun exposure. Berries were crushed gently by hand within ziploc bags to release the juice.
NOTE: Field testing for a cultivar was discontinued following harvest. Notes on Degree Days: Degree days listed are generated by SkyBit, Inc.'s subscription E-Weather Service using simulated weather models. These degree day values may differ from actual local temperature data. |
9/21/10 ; Degree Days = 2440 (Base 50F from January 1st <skybit.com>)
Remaining winegrape cultivars harvested; Field testing concluded for 2010
9/20/10 ; Degree Days = 2434 (Base 50F from January 1st <skybit.com>)
| Brix | pH | TA (g/100ml) | Harvest Date | |
'CorotNoir' |
18.0 | 3.00 | 0.86 | |
'Frontenac' |
na | na | na | 9/9/10 |
'LaCrescent' |
na | na | na | 9/9/10 |
'Marquette' |
na | na | na | 9/9/10 |
'PrarieStar' |
na | na | na | 9/9/10 |
'St.Croix' |
na | na | na | 9/1/10 |
'Traminette' |
22.0 | 2.72 | 1.07 | |
'Vignoles' |
23.0 | 2.99 | 1.47 |
9/14/10 ; Degree Days = 2398 (Base 50F from January 1st <skybit.com>)
| Brix | pH | TA (g/100ml) | Harvest Date | |
'CorotNoir' |
17.0 | 3.04 | 0.96 | |
'Frontenac' |
na | na | na | 9/9/10 |
'LaCrescent' |
na | na | na | 9/9/10 |
'Marquette' |
na | na | na | 9/9/10 |
'PrarieStar' |
na | na | na | 9/9/10 |
'St.Croix' |
na | na | na | 9/1/10 |
'Traminette' |
21.0 | 2.76 | 1.13 | |
'Vignoles' |
22.5 | 3.02 | 1.47 |
9/7/10 ; Degree Days = 2314 (Base 50F from January 1st <skybit.com>)
| Brix | pH | TA (g/100ml) | Harvest Date | |
'CorotNoir' |
16.5 | 2.88 | 1.11 | |
'Frontenac' |
25.0 | 3.12 | 1.56 | |
'LaCrescent' |
23.0 | 3.04 | 1.38 | |
'Marquette' |
25.5 | 3.03 | 1.32 | |
'PrarieStar' |
21.0 | 3.19 | 1.01 | |
'St.Croix' |
na | na | na | 9/1/10 |
'Traminette' |
20.0 | 2.65 | 1.28 | |
'Vignoles' |
22.0 | 2.93 | 1.55 |
8/30/10 ; Degree Days = 2136 (Base 50F from January 1st <skybit.com>)
| Brix | pH | TA (g/100ml) | Harvest Date | |
'CorotNoir' |
na | na | na | |
'Frontenac' |
23 | 3.00 | 1.89 | |
'LaCrescent' |
21 | 2.86 | 1.65 | |
'Marquette' |
23 | 2.84 | 1.61 | |
'PrarieStar' |
19.5 | 3.08 | 1.14 | |
'St.Croix' |
18 | 3.01 | 0.96 | |
'Traminette' |
na | na | na | |
'Vignoles' |
na | na | na |
8/23/10 ; Degree Days = 2029 (Base 50F from January 1st <skybit.com>)
| Brix | pH | TA (g/100ml) | Harvest Date | |
'CorotNoir' |
na | na | na | |
'Frontenac' |
19.2 | 2.81 | 1.91 | |
'LaCrescent' |
na | na | na | |
'Marquette' |
19.8 | 2.79 | 1.56 | |
'PrarieStar' |
18.0 | 3.01 | 1.26 | |
'St.Croix' |
15.5 | 2.73 | 1.20 | |
'Traminette' |
na | na | na | |
'Vignoles' |
na | na | na |
8/13/10 ; Degree Days = 1851 (Base 50F from January 1st <skybit.com>)
| Brix | pH | TA (g/100ml) | Harvest Date | |
'CorotNoir' |
na | na | na | |
'Frontenac' |
na | na | na | |
'LaCrescent' |
na | na | na | |
'Marquette' |
15.5 | 2.73 | 2.32 | |
'PrarieStar' |
14.5 | 2.92 | 2.12 | |
'St.Croix' |
na | na | na | |
'Traminette' |
na | na | na | |
'Vignoles' |
na | na | na |
Please send comments and suggestions to: lorraine.berkett@uvm.edu
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