Grape phenology and GDD accumulation

September 27, 2011 by Marilyn Odneal

GDD base 50 accumulated since April 1 = 3557 (+232 departure from normal) at Mountain Grove
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 Traminette E-L Stage 40

N Vignoles E-L Stage 40

N Concord E-L Stage 40

N Sunbelt E-L Stage 40

N Norton E-L Stage 37

MVEC Chambourcin E-L Stage 37

W Catawba E-L Stage 38

R Cayuga White E-L Stage 40

R Vidal Blanc E-L Stage 40

R Seyval Blanc E-L Stage 40

R Catawba E-L Stage 40

L Chardonel E-L Stage 40

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