Grape phenology and GDD accumulation

June 29, 2015 by Marilyn Odneal

GDD base 50 accumulated since April 1 = 1274
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 Norton E-L Stage 33 Berries still hard and green.

MVEC Delaware E-L Stage 33 Berries still hard and green.

MVEC Valvin Muscat E-L Stage 33 Berries still hard and green.

MVEC Sunbelt E-L Stage 33 Berries still hard and green.

MVEC Chambourcin E-L Stage 32-33 Beginning of bunch closure to berries still hard and green.

W Catawba E-L Stage 33 Berries still hard and green.

R Seyval Blanc E-L Stage 33 Berries still hard and green.

R Catawba E-L Stage 33 Berries still hard and green.

F Vignoles E-L Stage 33 Berries still hard and green.

F Chardonel E-L Stage 33 Berries pepper-corn to pea size.

F Traminette E-L Stage 33 Berries still hard and green.

F Cayuga White E-L Stage 33 Berries still hard and green.

D Concord E-L Stage 33 Berries still hard and green.

D Vivant E-L Stage 33 Berries still hard and green.

D Vidal Blanc E-L Stage 33 Berries still hard and green.

D Mars E-L Stage 32-33 Beginning of bunch closure to berries still hard and green.