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Seedless Table Grapes 2009 Update. Judith Reith-Rozelle Assistant Superintendent University of Wisconsin, West Madison Agricultural Research Station 8502 Mineral Point Road Verona, WI 53593 jreithrozell@wisc.edu. Seedless Table Grape Trials. Third Year Trial Data:

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seedless table grapes 2009 update
Seedless Table Grapes2009 Update

Judith Reith-Rozelle

Assistant Superintendent

University of Wisconsin, West Madison

Agricultural Research Station

8502 Mineral Point Road

Verona, WI 53593

jreithrozell@wisc.edu

seedless table grape trials
Seedless Table Grape Trials
  • Third Year Trial Data:
      • Variety/Cultivar performance
      • Ripening Sequence
      • Cluster weights
      • Data collection/program for 2010

Judith Reith-Rozelle

Assistant Superintendent

West Madison Agricultural Research Station

seedless table grape trial design
Seedless Table Grape Trial Design
  • Non-Replicated Trial
  • Established in June 2007 at West Madison Agricultural Research Station
  • Fifteen Grape Cultivars
    • Six Red
    • Five Blue
    • Four White
  • Three plants each variety
training methods for table grapes
Training Methods for Table Grapes
  • High Wire Cordon
  • Concord Seedless
  • Somerset Seedless
  • Mars

Photos – Selections at West Madison and Peninsular

Mid-wire Cordon with Vertical Shoot Positioning

grape vine development 2009
Grape Vine Development - 2009
  • Spring - 2009
    • No bud or cane damage on 12 varieties - low temp ( -28 degrees)
    • Bud damage
      • Glenora
      • Himrod
      • Reliance
fruit and flower formation
Fruit and Flower Formation
  • Controlled development of all fruit/flower production: removed all flower clusters in 07 – 08 – Thinned flower clusters 2009.
diseases insects
Diseases/Insects
  • Diseases in Select Cultivars:
    • Sprayed all vines following recommended schedule and chemicals
      • Black Rot or Phomopsis - Marquis fruit/foliage
      • Powdery Mildew - Glenora and Marquis
  • Insect Pressure on Cultivars:
    • Japanese Beetles
    • Leaf Hoppers
seedless table grape varieties
Seedless Table Grape Varieties

Reds Blues

  • Canadice Concord Seedless
  • Einset Glenora
  • Reliance Mars
  • Saturn Trollhaugen
  • Somerset Seedless Venus
  • Vanessa

Whites

  • Himrod
  • Interlaken
  • Lakemont
  • Marquis

Photos: UW – Madison, West Madison Agricultural Research Station Staff

seedless table grape varieties9
Seedless Table Grape Varieties
  • Red Seedless
      • Non-slipskin
    • Canadice (New York)
      • Mid-Season - 9/2/09
        • Brix 18.10
        • Fruit clusters compact
        • Flesh crisp
        • Flavor very spicy, sweet, complex

Photos: UW – Madison, West Madison Agricultural Research Station Staff

seedless table grape varieties10
Seedless Table Grape Varieties
  • Red Seedless
    • Einset(New York)
      • Early-Season - 9/20/09
        • Brix 19.10
        • Fruit clusters loose to open
        • Flesh tender to firm
        • Skin, thicker than other, nonslip
        • Flavor very unique complex

Photos: UW – Madison, West Madison Agricultural Research Station Staff

seedless table grape varieties11
Seedless Table Grape Varieties
  • Red Seedless
    • Reliance (Arkansas)
      • Mid-Season
        • Limited fruit 2009 - 4 clusters
        • Winter damage 2007 – vines froze to ground level
        • Replanted in 2008, due to possible herbicide damage

Photo: UW – Madison, West Madison Agricultural Research Station Staff

seedless table grape varieties12
Seedless Table Grape Varieties
  • Red Seedless
    • Saturn (Arkansas)
      • Early-Season - 9/10/09
        • Brix 17.1
        • Fruit clusters very open
          • Pollination problem
        • Flesh crisp
        • Flavor very spicy
        • Seeds developed 2009
          • Not small seed traces

Photo: Courtesy of New York State, Agricultural Research Station - Geneva

Photos: UW – Madison, West Madison Agricultural Research Station Staff

seedless table grape varieties13
Seedless Table Grape Varieties
  • Red Seedless
    • Somerset Seedless(Elmer Swenson)
      • Early-Season – 8/14/09
          • 8/20/09 sweeter -Brix 20.0
          • 9/2/09 extremely sweet – Brix 22.1
        • Fruit clusters open
        • Flesh tender to firm
        • Flavor spicy, complex

Photos: UW – Madison, West Madison Agricultural Research Station Staff

seedless table grape varieties14
Seedless Table Grape Varieties
  • Red Seedless
    • Vanessa (Ontario)
      • Mid-Season - 9/2/09
        • Brix 16.3
        • Fruit clusters very compact
        • Flesh crisp, firm
        • Flavor very fruity, sweet, spicy
        • No seed remnant

Photos: UW – Madison, West Madison Agricultural Research Station Staff

seedless table grape varieties15
Seedless Table Grape Varieties
  • White Seedless
      • Non slipskin
    • Himrod (New York)
      • Mid-Season
        • No fruit 2009
          • Winter damage 2007 – vines froze to ground
          • Struggled in 2008, due to possible herbicide damage on new growth

Photo: Courtesy of New York State, Agricultural Research Station - Geneva

seedless table grape varieties16
Seedless Table Grape Varieties
  • White Seedless
    • Interlaken (New York)
      • Early-Season - 9/20/09
        • Brix 18.10
        • Fruit clusters open
        • Flesh crisp, firm
        • Flavor very clean, sweet

Photo: UW – Madison, West Madison Agricultural Research Station Staff

seedless table grape varieties17
Seedless Table Grape Varieties
  • White Seedless
    • Lakemont (New York)
      • Early-Season - 8/27/09
        • Brix 20.0
        • Fruit clusters loose, open
        • Flesh melting, juicy
        • Flavor very spicy, clean, honey like (sweeter and more complex than Interlaken)

Photos: UW – Madison, West Madison Agricultural Research Station Staff

seedless table grape varieties18
Seedless Table Grape Varieties
  • White Seedless
    • Marquis (New York)
      • Mid-Season - 9/10/09
        • Brix 17.2
        • Fruit clusters loose and v. open
        • Flesh melting, juicy texture
        • Bland, but fresh taste
          • Thompson like
        • Disease problems – Black Rot/Phomopsis

Photos: Courtesy of Iowa State University

seedless table grape varieties19
Seedless Table Grape Varieties
  • Blue Seedless
      • Slipskin
      • Resistant to feeding of Japanese Beetles
    • Concord Seedless
      • Mid-Season - 9/2/09
        • Brix 21.5
        • Fruit clusters very tight
        • Flesh juicy, melting
        • Dense, deep, Foxy/American flavor
        • Seeds in fruit two vines – no seeds in one - matured earlier

Photos: UW – Madison, West Madison Agricultural Research Station Staff

seedless table grape varieties20
Seedless Table Grape Varieties
  • Blue Seedless
    • Glenora (Arkansas)
      • Four clusters of fruit 2009
        • Winter damage 2007 – vines froze to ground
        • Struggled in 2008, due to possible herbicide damage on new growth in 2007

Photo courtesy of Stark Brothers Nursery

seedless table grape varieties21
Seedless Table Grape Varieties
  • Blue Seedless
    • Mars (Arkansas)
      • Mid-Season - 9/10/09
        • Brix 21.8
        • Fruit clusters tight
        • Flesh juicy, melting
        • Skin thinner than some other blues
        • Flavor dense, deep, spicy

Photo: UW – Madison, West Madison Agricultural Research Station Staff

seedless table grape varieties22
Seedless Table Grape Varieties
  • Blue Seedless
    • Trollehaugen (Arkansas)
      • Mid-Season - 9/10/09
        • Brix 16.3
        • Fruit clusters tight
        • Flesh melting
        • Flavor very sweet, deep, spicy

Photos: UW – Madison, West Madison Agricultural Research Station Staff

seedless table grape varieties23
Seedless Table Grape Varieties

Blue Seedless

  • Venus (Arkansas)
      • Mid-Season - 9/10/09
        • Brix 17.8
        • Fruit clusters very tight
        • Flesh melting
        • Flavor dense, deep, spicy – reminiscent of sweet, pink grapefruit

Photo: UW – Madison, West Madison Agricultural Research Station Staff

ripening sequence
Ripening Sequence

Fruit harvest and tasted on 8/14/09 were very sweet and ready for harvest – brix reading not taken

Fruit sweet enough to harvest – sweeter taste on week later 2009 Favorites

standard sizing for fresh market seedless table grapes
Standard Sizing for Fresh Market – Seedless Table Grapes

Sizing - International Commercial Quality Standards for Agricultural Produce – Established by United Nations Economic Commission for Europe (UNECE)

Canada follows the UNECE standards

seedless table grape trials27
Seedless Table Grape Trials

Fourth Year - 2010:

  • Seedless Table Grape Trial
    • Thin flower clusters to recommended rate for each cultivar
    • Apply gibberellic acid?
    • Monitor for disease and insect problems
    • Collect data on brix and acids
    • Trial at local market
    • Compile report on varieties

Judith Reith-Rozelle

Assistant Superintendent

West Madison Agricultural Research Station

seedless table grape trials support 2007 2010
Seedless Table Grape Trials Support 2007 - 2010
  • Wisconsin Department of Agriculture, Agricultural Development & Diversification Program (ADD) – 2007 - 2009
  • Wisconsin Grape Growers Association - New Grant for – 2010 -2011
  • Support from winery in the state – staff training/financial
  • University of Wisconsin – Madison, College of Agriculture and Life Sciences
  • University of Wisconsin – Madison, Cooperative Extension