Grape phenology and GDD accumulation

April 30, 2012 by Marilyn Odneal

GDD base 50 accumulated since April 1 = +267 (+132 departure from normal) at Mountain Grove http://agebb.missouri.edu/weather/reports/gddTable.asp

March 2012 GDD base 50: 306+267 = 573

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

N Traminette E-L Stage 14-17

N Concord E-L Stage 21

N Sunbelt E-L Stage 23

N Norton E-L Stage 15-16

MVEC Chambourcin E-L Stage 15-16

MVEC Valvin Muscat E-L Stage 14-15

W Catawba E-L Stage 19-20

R Vignoles E-L Stage 19

R Cayuga White E-L Stage 19-20

R Vidal Blanc E-L Stage 17

R Seyval Blanc E-L Stage 19

R Catawba E-L Stage 19

D Chardonel E-L Stage 17-19

D Vivant E-L Stage 15-17

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