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What's happening in the field?

At the Missouri State Fruit Experiment Station

Grape Phenology and GDD accumulation

August 4, 2025 by Jennifer Morganthaler

GDD base 50 = 2221  . 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

 

Concord Demo E-L Stage 35 Berries begin to colour and enlarge.
Foundation Cayuga White E-L Stage 35 Berries begin to colour and enlarge.
Foundation Traminette E-L Stage 34-35 34 Berries begin to soften; Sugar starts increasing. 35 Berries begin to colour and enlarge.
Foundation Vidal Blanc E-L Stage 35 Berries begin to colour and enlarge.
Foundation Norton E-L Stage 34-35. 34 Berries begin to soften; Sugar starts increasing. 35 Berries begin to colour and enlarge.
Foundation NC-6 E-L Stage 34 Berries begin to soften; Sugar starts increasing.
Foundation Chardonel E-L Stage 35 Berries begin to colour and enlarge.
Foundation Chambourcin E-L Stage 35 Berries begin to colour and enlarge.
Genomics CH x CS E–L Stage 35. Berries begin to colour and enlarge.
Foundation Vivant E-L Stage 34 Berries begin to soften; Sugar starts increasing.
Foundation Vignoles E-L Stage 35 Berries begin to colour and enlarge.
Foundation Orion E-L Stage 35 Berries begin to colour and enlarge.
Genomics NC-65 E-L Stage 34 Berries begin to soften; Sugar starts increasing.
Genomics NC-6 E-L Stage 34 Berries begin to soften; Sugar starts increasing.
Genomics J70 x V E-L Stage 36 Berries with intermediate sugar values.
Genomics J70 E-L Stage 36 Berries with intermediate sugar values.
MVEC Sunbelt E-L Stage 35 Berries begin to colour and enlarge.
MVEC Catawba E-L Stage 34 Berries begin to soften; Sugar starts increasing.
Mars Demo E-L Stage 36 Berries with intermediate sugar values.
Genomics Norton E-L Stage 33 Berries still hard and green.
New WInery Norton E-L Stage 34 Berries begin to soften; Sugar starts increasing.
New Winery Chambourcin E-L Stage 35 Berries begin to colour and enlarge.
Winery Catawba E-L Stage 35 Berries begin to colour and enlarge.

Norton North E-L Stage 34 Berries begin to soften; Sugar starts increasing.


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