Grape phenology and GDD accumulation

August 23, 2011 by Marilyn Odneal

GDD base 50 accumulated since April 1 = 2984 (+362 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 37

N Vignoles E-L Stage 39

N Concord E-L Stage 36

N Sunbelt E-L Stage 36

N Norton E-L Stage 36

MVEC Chambourcin E-L Stage 37

W Catawba E-L Stage 35

R Cayuga White E-L Stage 40

R Vidal Blanc E-L Stage 37

R Seyval Blanc E-L Stage 40

R Catawba E-L Stage 35

L Chardonel E-L Stage 40