Grape phenology and GDD accumulation

April 29, 2011 by Marilyn Odneal

GDD base 50 accumulated since April 1 = 240 (+110 departure from normal) at Mountain Grove
http://agebb.missouri.edu/weather/reports/gddTable.asp

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

N Traminette E-L Stage 9-12

N Vignoles E-L Stage 7-12

N Concord E-L Stage 12-15

N Sunbelt E-L Stage 11-13

N Norton E-L Stage 7-12

MVEC Chambourcin E-L Stage 7-12

W Catawba E-L Stage 4-12

R Cayuga White E-L Stage 11-13

R Vidal Blanc E-L Stage 7-12

R Seyval Blanc E-L Stage 12-14

R Catawba E-L Stage 12-14

L Chardonel E-L Stage 11-13

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