Grape phenology and GDD accumulation

May 27, 2013 by Marilyn Odneal

Noticed some open flowers on Sunbelt this morning.

GDD base 50 accumulated since April 1 = 449 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 17

N Concord E-L Stage 17

N Sunbelt E-L Stage 18

N Norton E-L Stage 16

MVEC Chambourcin E-L Stage 17-18

MVEC Valvin Muscat E-L Stage 16-17

W Catawba E-L Stage 15

R Vignoles E-L Stage 17

R Cayuga White E-L Stage 18

R Seyval Blanc E-L Stage 17-18

R Catawba E-L Stage 16

D Chardonel E-L Stage 17-18

D Vivant E-L Stage 17-18

R Vidal Blanc E-L Stage 16-17

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