1. Winter Hardy Wine Grape Research
University of Wisconsin - Madison
West Madison Ag Research Station
Judith Reith-Rozelle
Assistant Superintendent
West Madison Agricultural Research Station

2. Seedless Table Grape Trails and Winter Hardy Wine Grape Research Project
Winter Survival – West Madison
2010 Growing Season
2011 Program
Seedless Table Grape Trail
Report – Fours Years of Growing
Judith Reith-Rozelle
Assistant Superintendent
West Madison Agricultural Research Station

3. Spring Bud Break – 2010 Wine Grapes
April 6 – Bud swell on 3 varieties - Foch, LaCrosse, and LaCrescent
April 11 – Bud swell on 9 varieties
April Bud break on 9 of the varieties
May 2 - Bud break - Vignoles
May 3 - Three to four inches of growth on 9 varieties
May 4 - First spray
May 8 – F table grape plots/33.8 F wine grape plots
May 10 - Foch
April 6 – Foch
April 20 - Foch
April 26 - Foch

4. Winter Survival 2009 - 2010 Winter Damage – Three Varieties
Sevyal Blanc – severe winter injury
Noiret – severe winter injury
Vignoles
Primary bud mortality – winter injury
Secondary buds survived

5. Winter Survival 2009 – 2010 Wine Grapes
No winter damage
Brianna
LaCresent
LaCrosse
Foch
Frontenac
Leon Millot
Marquette
MN1220 – planted 2009
LaCrescent
New York 76
Foch
Brianna

6. Diseases 2010 Foliar Diseases: Fruit Diseases: Downy Mildew –
LaCrescent
LaCrosse
New York 76 – very late in season
Powdery Mildew:
Fruit Diseases:
Sour Rot – Brianna
Left Brianna on vines too long
LaCrescent first to show Powdery Mildew
Brianna

7. Insects 2010 Insect Problems: Grape Phylloxera – Leon Millot October
Japanese beetle
July – one outbreak
Leaf Hoppers
Grape Phylloxera – Leon Millot
October

8. Harvest – 2010 Wine Grapes Vignoles Marquette Brianna New York 76
LaCrosse
Leon Millot
Frontenac
LaCrescent
Foch

9. Fruit Production Cultivar Name Hrvst Date Avg lb/vine 9/2 13.80 8/27
453 g/lb
Rep 1
Rep 2
Rep 3
Rep 4
Cultivar Name
Hrvst Date
Avg lb/vine
Total wght Kg
Total lbs.
Frontenac
9/2
13.80
22.68
49.96
21.89
48.22
31.41
69.19
24.27
53.46
Marquette
8/27
7.38
14.29
31.50
14.06
31.00
13.72
30.25
11.45
25.25
Foch
8/29
9.03
10.55
23.25
22.05
48.60
23.22
51.20
9.71
21.40
LaCrescent
8/24
9.72
18.46
40.66
16.62
36.61
22.13
48.74
13.36
29.43
Leon Millot
6.51
11.89
26.19
11.38
25.07
13.10
28.85
10.90
24.01
NY76
9.35
11.00
24.23
19.90
43.83
17.46
38.46
19.56
43.08
LaCrosse
8/30
13.69
24.10
53.12
25.90
57.00
23.90
52.60
25.54
56.30
Brianna
8.75
19.73
43.46
14.57
32.09
11.79
25.97
Vignoles
*3.36
6.63
14.60
7.26
15.99
8.62
18.99
1.93
4.25

10. Brix Harvest 8/9/2010 8/15/2010 8/23/2010 8/24/2010 8/27/2010
Cultivar
Date/Brix
Harvest
8/9/2010
8/15/2010
8/23/2010
8/24/2010
8/27/2010
8/30/2010
Date
Frontenac
14.6 19
20.5
21.5 22
9/2
Marquette
19.8
21.6 21
22.2 #
8/27
Foch
18.5
21.8
22.5
8/30
La Crescent
16.2
19.4
8/24
Leon Millot
18.1
19.2
19.6
NY76
10.3
15.1 17
17.5 
La Crosse
12.9
15.5
17.3
19.5
Brianna
17.7
19.3
20.2
Vignoles
11.3
14.1
20.4
20.2 

11. 2011Canopy Management/Fruit Set
Canopy management will be one focus of 2011 research
Thinning and pruning – produce more open canopy
Possible growth regulator on varieties that have very tight clusters……..still being discussed

12. 2011 Fruit Analysis Fruit Analysis: pH, TA, Brix, Total phenolics
Anthocyanins
Phenolic profiles
Dr. Rebecca Harbut, Beth Workmaster, Dean Volenburg, and staff at Peninsular and West Madison Research Stations

13. Fruit Analysis Fruit Analysis: Jelly tasting Marqette/Brianna
Marquette

14. Seedless Table Grapes Variety Trails
West Madison Agricultural Research Station
Madison, Wisconsin
College of Agriculture & Life Sciences
University of Wisconsin Madison

15. Seedless Table Grape Trial Design
First trail established in June 2007 at West Madison Research Station
Fifteen Grape Cultivars
Six Red
Five Blue
Four White
Three plants each cultivar
- Double Trunks
July 18, 2007

16. Grape Vine Development - 2009
Winter Injury
Glenora
Himrod
Reliance
Marquis

17. Spring Bud Break
April 12 – Bud break - 10 varieties/ 3 - bud swelling/ 2- no growth
April 18 – 30.9 F/ in table grape plot/ 34.8 F/ wine grape plots
May 3 - Three to four inches of growth - 6 varieties
May 4 - First spray
May 8 – 33.9 degrees table grape plots
Table grapes are lower on the slope than wine grapes.
April 26 - Trollhaugen
April 12 - Canadice
April 12 - Lakemont

18. 2010 Winter Injury/Frost Damage Red Grapes
Cultivar Name
Color
Winter Injury
Frost Injury 5/28
Somerset Seedless
Red 0%
Concord Seedless
Blue
Trollhaugen
Interlaken
White
66%
Lakemont
90%
Mars
10%
Canadice
30%
Vanessa
65%
Einset
Reliance
20%
Marquis
75%
Venus
33%
Himrod
60%
Glenora
100%

19. Seedless Table Grape Training System
Double Trunk
Illustrations from:
Ohio State Univ.
Bulletin 815, Agdex 231

20. Brix and Harvest Weights
Table Grapes - Brix/Fruit Weight
Date of Ripening 3
Vines 
8/15
8/21
9/7
Cultivar Name
Color
Harvest Wt lbs
Brix
Somerset Seedless*
Red 38
18.50
20.00
harv
Canadice 21
18.00
19.20
21.20
Concord Seedless *
Blue 32
14.00
16.80
17.00
Vanessa* 12
16.50
17.50
harv  
Trollhaugen* 41
19.30
19.0
Einset * 25
19.60
Venus * 10
17.90
Interlaken
White 8
15.90
19.10
21.00
Lakemont 19
19.50
Mars * 36
14.50
17.10
Marquis
15.30
18.20
Himrod 16
Reliance 15
20.50
Concord – seeds in fruit and two different strains or varieties- ripened later
Glenora – Dead to base all 3 vines on 6/14

21. Diseases Foliage Diseases: Fruit Disease: Cane, Root, Trunk Disease:
Downy Mildew – Marquis and Venus
Powdery Mildew – Einset, Canadice, Mars
Phomopsis and Leaf Spot – Leaf Spot on a few varieties very minimal
Fruit Disease:
Botrytis Bunch Rot or Gray Rot
Black Rot
Sour Rot
Cane, Root, Trunk Disease:
Crown Gall – Venice and Canadice
Bacterial disease
bacterial disease caused by Agrobacterium vitis, soil born, come in on vines, pruners
Sovran, Pristine, Captan
Pennsylvania State University photo

22. Recommended Cultivars -2010
Einset – -25 F/, red seedless grape with a unique, sweet, fruity flavor. Some remnant seeds –
Average cluster 182 g/ berry 2.8 g, can leave on vine for weeks, harvested 8/21/ /21/ 2010 –
Ratings by sampling group 4.04
Mars – -20 F/, blue seedless grape, berries are slipskin, have a strong “concord” flavor –
Average cluster 140 g/berry 2.6 g,
Ratings by sampling group 3.28

23. Recommended Cultivars -2010
Somerset Seedless F/ a red seedless grape with small berries, complex flavor
Average cluster 131 g/ berry 1.2 g,
Harvested 8/20/ /15/ 2010 –
Can leave on vine for several weeks -
Rating by sample group
Trollhaugen F/a blue seedless table grape. Good diseases resistance, fruit - sweet, intense, spicy flavor –
Average cluster 115 g/berry 1.7 g,
Rating by sampling group – 3.36

24. Varieties with Good Possibilities
Canadice – -25 F/ Fruit very complex flavor and deep rose color, monitor for disease problems – rating by sampling group – 3.48
Cluster weight = 125 g/Berry weight = 1.8 g -harvested 8/20/2009 – 8/21/2010
Reliance – -25 F/ Good disease resistance, Fruit excellent deep flavor and slightly melting texture – rating by sampling group
Cluster weight = 152 g/ Berry weight = 2.8 g - harvested 8/21/2010

25. Varieties with Good Possibilities
Lakemont – - 20 F/ mild, sweet, bit spicy flavor and beautiful, white, gold color
Cluster weight = 220 g. Berry weight = 1.9 g
Interlaken - Winter hardy- Zone 6, beautiful green, gold color and mild, sweet, bit spicy flavor fruit
Cluster weight = 195 g. Berry weight = 1.9 g

26. Varieties with Good Possibilities
Vanessa – Hardy, productive flavor is fruit is sweet, mild flavored, relatively small, berry texture is firm (not enough for sampling)
Cluster weight = 102 g Berry weight = 1.2 g
Venus F/ productive blue-black fruit with very spicy, complex taste. The medium-large clusters ripen early– rating by sampling group
Cluster weight = 228 g. Berry weight = 3.2 g

27. Varieties with Some Possibilities
Marquis - White grape with large, sweet, mild fruit, large clusters.
Cluster weight = 165 g. Berry weight = 2.9 g
Himrod – White seedless that is relative of Thompson Seedless
Cluster weight = 165 g. Berry weight = 1.8 g
Himrod grows well in New York

28. Varieties Removed Saturn – Fruit seeded/bitter
Glenora – Not winter hardy in WI
Concord Seedless – Fruit seeded, uneven ripening

29. Report on Seedless Table Grape Trials
On-line at:
Wisconsin Grape Growers Association
West Madison Research Station Garden Web Site
Garden Blog
Section 4 - Conclusions Gathered Based through Project Work:

30. Program for 2011 Try different pruning technique
Plant two new selections:
Jupiter
Not decided
Apply growth regulator:
Somerset Seedless – increase size of fruit

31. Seedless Table Grape Trials Support 2010 - 2011
Agricultural Development & Diversification Program (ADD) –
2010 – 2011 – Specialty Crops Grant – Wisconsin Grape Growers Association
Wisconsin Winery
University of Wisconsin – Madison, College of Agriculture and Life Sciences