Grape phenology and GDD accumulation

June 20, 2011 by Marilyn Odneal

GDD base 50 accumulated since April 1 = 1146 (+188 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 31-32

N Vignoles E-L Stage 31-32

N Concord E-L Stage 33

N Sunbelt E-L Stage 33

N Norton E-L Stage 30

MVEC Chambourcin E-L Stage 32

W Catawba E-L Stage 32-33

R Cayuga White E-L Stage 33

R Vidal Blanc E-L Stage 31

R Seyval Blanc E-L Stage 31-32

R Catawba E-L Stage 33

L Chardonel E-L Stage 31-32