What's happening in the field?

At the Missouri State Fruit Experiment Station

Grape Phenology and GDD accumulation

by

GDD base 50 = 2292. 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

 

Norton N E-L Stage 33 Berries still hard and green
Mars Demo E-L Stage 36 Berries with intermediate sugar values
Concord Demo E-L Stage 33-34 Berries still hard and green to Berries begin to soften;
Sugar starts increasing

 

 

 

 

 

 

 

 

 

 

 

 

Vivant F E-L Stage 34-35 Berries begin to soften; Sugar starts increasing to Berries begin to colour and enlarge
Norton F E-L Stage 33-35 Berries still hard and green to Berries begin to soften; Sugar starts increasing to Berries begin to colour and enlarge
Vignoles F E-L Stage 35 Berries begin to colour and enlarge

 

 

 

 

 

 

 

 

 

 

 

 

 

Chambourcin F E-L Stage 35-36 Berries begin to colour and enlarge to Berries with intermediate sugar values
Chardonel F E-L Stage 34-35 Berries begin to soften; Sugar starts increasing to Berries begin to colour and enlarge
Vidal Blanc F E-L Stage 33-34 Berries still hard and green to Berries begin to soften; Sugar starts increasing

 

 

 

 

 

 

 

 

 

 

 

 

Traminette F E-L Stage 34-35 Berries begin to soften; Sugar starts increasing to Berries begin to colour and enlarge
Cayuga White F E-L Stage 35-36 Berries begin to colour and enlarge to Berries with intermediate sugar values
Norton R E-L Stage 33 Berries still hard and green

 

 

 

 

 

 

 

 

 

 

 

 

Catawba R E-L Stage 33 Berries still hard and green
Seyval Blanc R E-L Stage 36-37 Berries with intermediate sugar values to Berries not quite ripe
Chardonel W E-L Stage 34-35 Berries begin to soften; Sugar starts increasing to Berries begin to colour and enlarge

 

 

 

 

 

 

 

 

 

 

 

 

Catawba W E-L Stage 33 Berries still hard and green
NC-6 G E-L Stage 33 Berries still hard and green
Norton G E-L Stage 33 Berries still hard and green

 

 

 

 

 

 

 

 

 

 

MVEC Sunbelt E-L Stage 33-35 Berries still hard and green to Berries begin to soften;
Sugar starts increasing to Berries begin to colour and enlarge
MVEC Chambourcin E-L Stage 35-36 Berries begin to colour and enlarge to Berries with intermediate sugar values

 

 

 

 

 

 

 

 

 

 

 

 

 

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