Grape phenology and GDD accumulation

July 30, 2018 by Marilyn Odneal

GDD base 50 accumulation for today = 2275 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.

G Norton E-L Stage 33 Berries still hard and green.

G Cabernet Sauvignon E-L Stage 33 Berries still hard and green.

MVEC Delaware E-L Stage 35 Berries begin to colour and enlarge.

MVEC Sunbelt E-L Stage 35 Berries begin to colour and enlarge.

MVEC Chambourcin E-L Stage 35 Berries begin to colour and enlarge.

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

NWV Chardonel E-L Stage 35 Berries begin to colour and enlarge.

R Seyval Blanc E-L Stage 35 Berries begin to colour and enlarge.

R Vidal Blanc E-L Stage 34 Berries beginning to soften; sugar starts increasing.

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

Vignoles E-L Stage 34 Berries beginning to soften; sugar starts increasing.

F Chardonel E-L Stage 35 Berries begin to colour and enlarge.

F Traminette E-L Stage 34 Berries beginning to soften; sugar starts increasing.

F Cayuga White E-L Stage 35 Berries begin to colour and enlarge.

D Concord E-L Stage 35 Berries begin to colour and enlarge.

D Vivant E-L Stage 35 Berries begin to colour and enlarge.

D Mars E-L Stage 35 Harvest.