Grapevine phenology and GDD accumulation

April 15, 2013 by Marilyn Odneal

GDD base 50 accumulated since April 1 = 82 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 3

N Concord E-L Stage 3-4

N Sunbelt E-L Stage 3

N Norton E-L Stage 2-3

MVEC Chambourcin E-L Stage 3-4

MVEC Valvin Muscat E-L Stage 3-4

W Catawba E-L Stage 2-3

R Vignoles E-L Stage 3

R Cayuga White E-L Stage 3-4

R Vidal Blanc E-L Stage 3-4

R Seyval Blanc E-L Stage 4

R Catawba E-L Stage 3-4

D Chardonel E-L Stage 3-4

D Vivant E-L Stage 3-4