Grape phenology and GDD accumulation

April 9, 2012 by Marilyn Odneal

GDD base 50 accumulated since April 1 = +89 (+80 departure from normal) at Mountain Grove http://agebb.missouri.edu/weather/reports/gddTable.asp

March 2012 GDD base 50: 306+89 = 395

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

N Traminette E-L Stage 13-15

N Concord E-L Stage 13-15

N Sunbelt E-L Stage 13-15

N Norton E-L Stage 12-14

MVEC Chambourcin E-L Stage 9-13

MVEC Valvin Muscat E-L Stage 9-12

W Catawba E-L Stage 9-12

R Vignoles E-L Stage 11-13

R Cayuga White E-L Stage 13-15

R Vidal Blanc E-L Stage 9-12

R Seyval Blanc E-L Stage 11-13

R Catawba E-L Stage 13-15

D Chardonel E-L Stage 12-14

D Vivant E-L Stage 9-14

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