Grape phenology and GDD accumulation

June 25, 2018 by Marilyn Odneal

GDD base 50 accumulation for today = 1315 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 32 Beginning of bunch closure, berries touching (if bunches are tight).

G Norton E-L Stage 32 Beginning of bunch closure, berries touching (if bunches are tight).

G Cabernet Sauvignon E-L Stage 32 Beginning of bunch closure, berries touching (if bunches are tight).

MVEC Delaware E-L Stage 32 Beginning of bunch closure, berries touching (if bunches are tight).

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

MVEC Chambourcin E-L Stage 32 Beginning of bunch closure, berries touching (if bunches are tight).

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

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

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

R Vidal Blanc E-L Stage 32 Beginning of bunch closure, berries touching (if bunches are tight).

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

Vignoles 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 32 Beginning of bunch closure, berries touching (if bunches are tight).

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

D Vivant E-L Stage 32 Beginning of bunch closure, berries touching (if bunches are tight).

D Mars E-L Stage 32 Beginning of bunch closure, berries touching (if bunches are tight).