Grape phenology and GDD accumulation

August 6, 2012 by Marilyn Odneal

GDD base 50 accumulated since April 1 = +2780 (+591 departure from normal) at Mountain Grove http://agebb.missouri.edu/weather/reports/gddTable.asp

March 2012 GDD base 50: 306+2780 = 3086

Phenology stages according to the Modified E-L system http://door.uwex.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf

N Traminette E-L Stage 37

N Concord E-L Stage 36

N Sunbelt E-L Stage 36

N Norton E-L Stage 35 - 36 — N Norton E-L Stage 35 – 36

MVEC Chambourcin E-L Stage 37

W Catawba E-L Stage 35-36

R Vignoles E-L Stage 38

R Cayuga White E-L Stage 39

R Vidal Blanc E-L Stage 38

R Seyval Blanc E-L Stage 39

R Catawba E-L Stage 35-36

D Chardonel E-L Stage 39

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