Grape phenology and GDD accumulation

November 1, 2015 by Marilyn Odneal

GDD base 50 accumulated since April 1 = 3639
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 Norton E-L Stage 44 Intermediate leaf fall

MVEC Delaware E-L Stage 47 End of leaf fall

MVEC Valvin Muscat E-L Stage 47 End of leaf fall

MVEC Sunbelt E-L Stage 47 End of leaf fall

MVEC Chambourcin E-L Stage 43 Beginning of leaf fall

W Catawba E-L Stage 43 Beginning of leaf fall

R Seyval Blanc E-L Stage 46 Intermediate leaf fall

R Catawba E-L Stage 46 Intermediate leaf fall

F Vignoles E-L Stage 44 Intermediate leaf fall

F Chardonel E-L Stage 47 End of leaf fall

F Traminette E-L Stage 46 Intermediate leaf fall

F Cayuga White E-L Stage 47 End of leaf fall

D Concord E-L Stage 46 Intermediate leaf fall

D Vivant E-L Stage 47 End of leaf fall

D Vidal Blanc E-L Stage 44 Intermediate leaf fall

D Mars E-L Stage 46 Intermediate leaf fall