Grape Phenology and GDD accumulation

July 2, 2012 by Marilyn Odneal

GDD base 50 accumulated since April 1 = +1617 (+390 departure from normal) at Mountain Grove http://agebb.missouri.edu/weather/reports/gddTable.asp

March 2012 GDD base 50: 306+1617 = 1923

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

N Traminette E-L Stage 33

N Concord E-L Stage 33+

N Sunbelt E-L Stage 33+

N Norton E-L Stage 33

MVEC Chambourcin E-L Stage 33+

W Catawba E-L Stage 33

R Vignoles E-L Stage 34

R Cayuga White E-L Stage 34-35

R Vidal Blanc E-L Stage 33

R Seyval Blanc E-L Stage 34-35

R Catawba E-L Stage 33

D Chardonel E-L Stage 34

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