Grape phenology and GDD accumulation

June 3, 2013 by Marilyn Odneal

GDD base 50 accumulated since April 1 = 597 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 20-21

N Concord E-L Stage 26

N Sunbelt E-L Stage 27

N Norton E-L Stage 17-18

MVEC Chambourcin E-L Stage 23-26

MVEC Valvin Muscat E-L Stage 20-22

W Catawba E-L Stage 23-26

R Vignoles E-L Stage 21-25

R Cayuga White E-L Stage 25-26

R Vidal Blanc E-L Stage 20-21

R Seyval Blanc E-L Stage 23-25

R Catawba E-L Stage 26

D Chardonel E-L Stage 23-25

D Vivant E-L Stage 23-26