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What's happening in the field?

At the Missouri State Fruit Experiment Station

Grape phenology and GDD accumulation

July 29, 2020 by Marilyn Odneal

GDD base 50 = 1923 at  http://agebb.missouri.edu/weather/reports/gddTable.asp

Phenology stages described according to the Modified E-L System http://door.uwex.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf

N Norton E-L Stage 33 Berries still hard and green.
N Norton E-L Stage 33 Berries still hard and green.
G Norton E-L Stage 33 Berries still hard and green.
G Norton E-L Stage 33 Berries still hard and green.
G Cabernet Sauvignon E-L Stage 33 Berries still hard and green.
G Cabernet Sauvignon E-L Stage 33 Berries still hard and green.
MVEC Sunbelt E-L Stage 33 Berries still hard and green.
MVEC Sunbelt E-L Stage 33 Berries still hard and green.
MVEC Chambourcin E-L Stage 33 Berries still hard and green.
MVEC Chambourcin E-L Stage 33 Berries still hard and green.
W Catawba E-L Defruited
W Catawba E-L Defruited
NWV Chardonel E-L Stage 33 Berries still hard and green.
NWV Chardonel E-L Stage 33 Berries still hard and green.
R Seyval Blanc E-L Stage 34 Berries begin to soften; Sugar starts increasing.
R Seyval Blanc E-L Stage 34 Berries begin to soften; Sugar starts increasing.
R Seyval Blanc E-L Stage 34 Berries begin to soften; Sugar starts increasing.
R Seyval Blanc E-L Stage 34 Berries begin to soften; Sugar starts increasing.
R. Norton E-L Stage 33 Berries still hard and green.
R. Norton E-L Stage 33 Berries still hard and green.
F Vivant E-L Stage 34 Berries begin to soften; Sugar starts increasing.
F Vivant E-L Stage 34 Berries begin to soften; Sugar starts increasing.
F Norton E-L Stage 33 Berries still hard and green.
F Norton E-L Stage 33 Berries still hard and green.
F Vignoles E-L Stage 33 Berries still hard and green.
F Vignoles E-L Stage 33 Berries still hard and green.
F Chambourcin E-L Stage 33 Berries still hard and green.
F Chambourcin E-L Stage 33 Berries still hard and green.
F Chardonel E-L Stage 33 Berries still hard and green.
F Chardonel E-L Stage 33 Berries still hard and green.
F Vidal Blanc E-L Stage 33 Berries still hard and green.
F Vidal Blanc E-L Stage 33 Berries still hard and green.
F Traminette E-L Stage 33 Berries still hard and green.
F Traminette E-L Stage 33 Berries still hard and green.
F Cayuga White E-L Stage 34 - 35 Berries begin to soften; Sugar starts increasing to Berries begin to colour and enlarge.
F Cayuga White E-L Stage 34 – 35 Berries begin to soften; Sugar starts increasing to Berries begin to colour and enlarge.
D Concord E-L Stage 33 Berries still hard and green.
D Concord E-L Stage 33 Berries still hard and green.
D Mars E-L Stage 35 – 36 Berries begin to soften; sugar starts increasing to Berries begin to colour and enlarge to Berries with intermediate sugar levels.
D Mars E-L Stage 35 – 36 Berries begin to soften; sugar starts increasing to Berries begin to colour and enlarge to Berries with intermediate sugar levels.

Filed Under: Grapes, Phenology

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