Grape phenology and GDD accumulation

July 28, 2014 by Marilyn Odneal

GDD base 50 accumulated since April 1 = 1915
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

Chambourcin is changing color.

N Norton E-L Stage 33-34

MVEC Delaware E-L Stage 36

MVEC Valvin Muscat E-L Stage 36

MVEC Sunbelt E-L Stage 35-36

MVEC Chambourcin E-L Stage 35

W Catawba E-L Stage 33-34

R Cayuga White E-L Stage 36

Vidal Blanc E-L Stage 35-36

R Seyval Blanc E-L Stage 36

R Catawba E-L Stage 33-34

F Chardonel E-L Stage 35-36

F Traminette E-L Stage 33-34

D Concord E-L Stage 33-34

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