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What's happening in the field?

At the Missouri State Fruit Experiment Station

Grape Phenology and GDD accumulation

April 25, 2022 by Jennifer Morganthaler

GDD base 50 = 109. We track GDD at http://agebb.missouri.edu/weather/reports/gddTable.asp and rate the phenology stages according to the Modified E-L System http://door.uwex.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf

 

N Norton E-L Stage 4 -7 Budburst to First leaf separated from shoot tip
D Mars E-L Stage 4 -7 Budburst to First leaf separated from shoot tip.
D Concord E-L Stage 7-9 First leaf separated from shoot tip to 2-3 leaves separated; shoots 2-4 cm long.
F Vivant E-L Stage 7-9 First leaf separated from shoot tip to 2 to 3 leaves separated; shoots 2-4 cm long.
F Norton E-L Stage 4-7 Budburst; leaf tips visible to First leaf separated from shoot tip.
F Vignoles E-L Stage 4-7 Budburst; leaf tips visible to First leaf separated from shoot tip.
F Chambourcin E-L Stage 4-7 Budburst; leaf tips visible to First leaf separated from shoot tip.
F Chardonel E-L Stage 9 2-3 leaves separated; shoots 2-4 cm long.
F Vidal Blanc E-L Stage 4-7 Budburst; leaf tips visible to First leaf separated from shoot tip.
F Traminette E-L Stage 4 Budburst; leaf tips visible.
F Cayuga White E-L Stage 4 Budburst; leaf tips visible.
R Norton E-L Stage 4 Budburst.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R Catawba E-L Stage 4-9 Budburst; leaf tips visible to 2 to 3 leaves separated; shoots 2-4 cm long.
R Seyval Blanc E-L Stage 4-7 Budburst; leaf tips visible to First leaf separatedf from shoot tip.
W Chardonel E-L Stage 4-9 Budburst; leaf tips visible to 2 to 3 leafs separated; shoots 2-4 cm long.
W Catawba E-L Stage 4-9 Budburst; leaf tips visible to 2 to 3 leaves separated; shoots 2-4 cm long.
Genomics NC-6 E-L Stage 3 Wooly bud +/- green showing.
Genomics Norton E-L Stage 4 Budburst;leaf tips visible.
MVEC Sunbelt E-L Stage 4-7 Budburst; leaf tips visible to 2 to 3 leaves separated; shoots 2-4 cm long.
MVEC Chambourcin E-L Stage 4-7 Budburst; leaf tips visible to 2 to 2 leaves separated; shoots 2-4 cm long.

 

 

 

 

 

 

 

Filed Under: Grapes, Phenology

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