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What's happening in the field?

At the Missouri State Fruit Experiment Station

Grape phenology and GDD accumulation

April 30, 2018 by Marilyn Odneal

GDD base 50 accumulation for April 23 = 97 http://agebb.missouri.edu/weather/reports/gddTable.asp
Phenology stages according to the Modified E-L System http://door.uwex.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf

N Norton E-L Stage 4 Budburst, leaf tips visible.
N Norton E-L Stage 4 Budburst, leaf tips visible.
G Norton E-L Stage 4 Budburst, leaf tips visible.
G Norton E-L Stage 4 Budburst, leaf tips visible.
G Cabernet Sauvignon E-L Stage 4 Budburst, leaf tips visible.
G Cabernet Sauvignon E-L Stage 4 Budburst, leaf tips visible.
MVEC Delaware E-L Stage 4 - 7 Budburst, leaf tips visible – First leaf separated from shoot tip.
MVEC Delaware E-L Stage 4 – 7 Budburst, leaf tips visible – First leaf separated from shoot tip.
MVEC Sunbelt E-L Stage 7 - 9 First leaf separated from shoot tip to 2 – 3 leaves separated; shoots 2 – 4 cm long.
MVEC Sunbelt E-L Stage 7 – 9 First leaf separated from shoot tip to 2 – 3 leaves separated; shoots 2 – 4 cm long.
MVEC Chambourcin E-L Stage 3 - 4 Wooly bud +- green showing to Budburst, leaf tips visible.
W Catawba E-L Stage 3 - 4 Wooly bud +- green showing to Budburst, leaf tips visible.
W Catawba E-L Stage 3 – 4 Wooly bud +- green showing to Budburst, leaf tips visible.
NWV Chardonel E-L Stage 3 - 4 Wooly bud +- green showing to Budburst, leaf tips visible.
NWV Chardonel E-L Stage 3 – 4 Wooly bud +- green showing to Budburst, leaf tips visible.
R Seyval Blanc E-L Stage 4 Budburst, leaf tips visible.
R Seyval Blanc E-L Stage 4 Budburst, leaf tips visible.
R Vidal Blanc E-L Stage 3 - 4 Wooly bud +- green showing to Budburst, leaf tips visible.
R Vidal Blanc E-L Stage 3 – 4 Wooly bud +- green showing to Budburst, leaf tips visible.
R Catawba E-L Stage 3 - 7 Wooly bud +- green showing to Budburst, leaf tips visible – First leaf separated from shoot tip.
R Catawba E-L Stage 3 – 7 Wooly bud +- green showing to Budburst, leaf tips visible – First leaf separated from shoot tip.
F Vignoles E-L Stage 3 - 7 Wooly bud +- green showing to Budburst, leaf tips visible.
F Vignoles E-L Stage 3 – 7 Wooly bud +- green showing to Budburst, leaf tips visible.
F Chardonel E-L Stage 3 - 4 Wooly bud +- green showing to Budburst, leaf tips visible to Budburst, leaf tips visible.
F Chardonel E-L Stage 3 – 4 Wooly bud +- green showing to Budburst, leaf tips visible to Budburst, leaf tips visible.
F Traminette E-L Stage 3 – 7 Wooly bud +- green showing to Budburst, leaf tips visible to First leaf separated from shoot tip.
F Traminette E-L Stage 3 – 7 Wooly bud +- green showing to Budburst, leaf tips visible to
First leaf separated from shoot tip.

F Cayuga White E-L Stage 4 - 9 Budburst, leaf tips visible to First lef separated from shoot tip to 2 to 3 leaves separated; shoots 2 – 4 cm long.
F Cayuga White E-L Stage 4 – 9 Budburst, leaf tips visible to First lef separated from shoot tip to 2 to 3 leaves separated; shoots 2 – 4 cm long.
D Concord E-L Stage 4 - 9 Budburst, leaf tips visible to First lef separated from shoot tip to 2 to 3 leaves separated; shoots 2 – 4 cm long.
D Concord E-L Stage 4 – 9 Budburst, leaf tips visible to First lef separated from shoot tip to 2 to 3 leaves separated; shoots 2 – 4 cm long.
D Vivant E-L Stage 3 - 4 Wooly bud +- green showing to Budburst, leaf tips visible.
D Vivant E-L Stage 3 – 4 Wooly bud +- green showing to Budburst, leaf tips visible.
D Mars E-L Stage 4 Budburst, leaf tips visible.
D Mars E-L Stage 4 Budburst, leaf tips visible.

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