Grape phenology and GDD accumulation

June 27, 2016 by Marilyn Odneal

GDD base 50 accumulation count beginning April 1 = 1210 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 32 - 33 Beginning of bunch closure; berries touching (if bunches are tight) Berries still hard and green. — G Norton E-L Stage 32 – 33 Beginning of bunch closure; berries touching (if bunches are tight) Berries still hard and green.

G Cabernet Sauvignon E-L Stage 32 - 33 Beginning of bunch closure; berries touching (if bunches are tight) Berries still hard and green. — G Cabernet Sauvignon E-L Stage 32 – 33 Beginning of bunch closure; berries touching (if bunches are tight) 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 33 Berries still hard and green.

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

NWV Arandel E-L Stage 32 Beginning of bunch closure; berries touching (if bunches are tight).

NWV Aromella 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.

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

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

F Traminette E-L Stage 32 Beginning of bunch closure; berries touching (if bunches are tight).

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; berries touching (if bunches are tight) and Berries still hard and green. — D Mars E-L Stage 32 – 33 Beginning of bunch closure; berries touching (if bunches are tight) and Berries still hard and green.