Grape phenology and GDD accumulation

April 9, 2018 by Marilyn Odneal

GDD base 50 accumulation for April 9 = 0 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

It has been cold and NO GDDs have accumulated for this first week in April.

N Norton E-L Stage 1-2 Winter bud to Bud scales opening.

G Norton E-L Stage 1-2 Winter bud to Bud scales opening.

G Cabernet Sauvignon E-L Stage 1-2 Winter bud to Bud scales opening.

MVEC Delaware E-L Stage 2 - 3 Bud scales opening to Wooly bud +- green showing. — MVEC Delaware E-L Stage 2 – 3 Bud scales opening to Wooly bud +- green showing.

MVEC Sunbelt E-L Stage 3 Wooly bud +- green showing.

MVEC Chambourcin E-L Stage 1 - 2 Winter bud to Bud scales opening. — MVEC Chambourcin E-L Stage 1 – 2 Winter bud to Bud scales opening.

W Catawba E-L Stage 1-2 Winter bud to Bud scales opening.

NWV Chardonel E-L Stage 1-2 Winter bud to Bud scales opening.

R Seyval Blanc E-L Stage 2 - 3 Bud scales opening to Wooly bud +- green showing. — R Seyval Blanc E-L Stage 2 – 3 Bud scales opening to Wooly bud +- green showing.

R Vidal Blanc E-L Stage 1 - 2 Winter bud to Bud scales opening — R Vidal Blanc E-L Stage 1 – 2 Winter bud to Bud scales opening

R Catawba E-L Stage 1 - 2 Winter bud to Bud scales opening. — R Catawba E-L Stage 1 – 2 Winter bud to Bud scales opening.

F Vignoles E-L Stage 1 - 2 Winter bud to Bud scales opening. — F Vignoles E-L Stage 1 – 2 Winter bud to Bud scales opening.

F Chardonel E-L Stage 1 - 2 Winter bud to Bud scales opening. — F Chardonel E-L Stage 1 – 2 Winter bud to Bud scales opening.

F Traminette E-L Stage 1 - 2 Winter bud to Bud scales opening. — F Traminette E-L Stage 1 – 2 Winter bud to Bud scales opening.

F Cayuga White E-L Stage 3 Wooly bud +- green showing.

D Concord E-L Stage 1 - 2 Winter bud to Bud scales opening. — D Concord E-L Stage 1 – 2 Winter bud to Bud scales opening.

D Vivant E-L Stage 1 - 2 Winter bud to Bud scales opening. — D Vivant E-L Stage 1 – 2 Winter bud to Bud scales opening.

D Mars E-L Stage 1 - 2 Winter bud to Bud scales opening. — D Mars E-L Stage 1 – 2 Winter bud to Bud scales opening.