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What's happening in the field?

At the Missouri State Fruit Experiment Station

Grape Phenology and GDD accumulation

April 11, 2023 by Jennifer Morganthaler

GDD base 50 = 59. We track GDD at http://agebb.missouri.edu/weather/reports/gddTable.asp and rate the phenology stages according to the Modified E-L System https://door.extension.wisc.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf 

North Norton E-L Stage 3 Wooly bud ± green showing
Demo Mars E-L Stage 4 Budburst; leaf tips visible
Demo Concord E-L Stage 7 First leaf separated from shoot tip
Foundation Vivant E-L Stage 2 Bud scales opening

 

 

Foundation Norton E-L Stage 2 Bud scales opening

 

 

 

 

Foundation Cayuga White E-L Stage 4 Budburst; leaf tips visible

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Foundation Vignoles E-L Stage 1 Winter Bud

 

Foundation NC-6 E-L Stage 1 Winter Bud
Foundation Chardonel E-L Stage 3 Wooly bud ± green showing

 

 

 

 

 

 

 

 

 

 

Foundation Traminette E-L Stage 3 Wooly bud ± green showing
Foundation Vidal Blanc E-l Stage 3 Wooly bud ± green showing
Foundation Vignoles E-L Stage 3 Wooly bud ± green showing
Foundation Vivant E-L Stage 2 Bud Scales Opening

 

 

 

 

 

 

 

 

 

 

 

 

Foundation Chambourcin E-L Stage 1 Winter Bud
Genomics NC-6 E-L Stage 2 Bud Scales opening

 

 

 

 

 

 

 

 

Genomics Norton E-L Stage 3 Wooly bud ± green showing
MVEC Chambourcin E-L Stage 1 Winter Bud
MVEC Sunbelt E-L Stage 4 Budburst; leaf tips visible

 

 

 

 

 

 

 

 

 

 

 

Research Catawba E-L Stage 4 Budburst; leaf tips visible
Research Seyval Blanc E-L Stage 3 Wooly bud ± green showing
Research Norton E-L Stage 3 Wooly bud ± green showing

Winery Catawba E-L Stage 2 Bud Scales Opening

 

 

 

 

Winery Chardonel E-L Stage 4 Budburst; leaf tip visible
Winery Chambourcin E-L Stage 3 Wooly bud ± green showing
Winery Norton E-L Stage 4 Budburst; leaf tip visible

Filed Under: Grapes, Phenology

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  • Grape Phenology and GDD accumulation
  • Grape Phenology and GDD accumulation
  • Grape Phenology and GDD accumulation

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