Grape Phenology and GDD Accumulation

July 31, 2012 by Marilyn Odneal

GDD base 50 accumulated since April 1 = +2591 (+567 departure from normal) at Mountain Grove http://agebb.missouri.edu/weather/reports/gddTable.asp

March 2012 GDD base 50: 306+2591 = 2897

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

N Traminette E-L Stage 36-37

R Seyval Blanc E-L Stage 39

R Catawba E-L Stage 35

F Chardonel E-L Stage 37-38

N Concord E-L Stage 35

N Sunbelt E-L Stage 36

N Norton E-L Stage 35

MVEC Chambourcin E-L Stage 37

W Catawba E-L Stage 34-35

R Vignoles E-L Stage 37-38

R Cayuga White E-L Stage 39

R Vidal Blanc E-L Stage 36-37

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