Grape phenology and GDD accumulation

June 5, 2017 by Marilyn Odneal

GDD base 50 accumulation since April 1 = 742. 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 26 - 27 26 Cap-fall complete to Setting; young berries enlarging (>2 mm diam.), bunch at right angles to stem. — N Norton E-L Stage 26 – 27 26 Cap-fall complete to Setting; young berries enlarging (>2 mm diam.), bunch at right angles to stem.

G Norton E-L Stage 26 - 27 26 Cap-fall complete to Setting; young berries enlarging (>2 mm diam.), bunch at right angles to stem. — G Norton E-L Stage 26 – 27 26 Cap-fall complete to Setting; young berries enlarging (>2 mm diam.), bunch at right angles to stem.

G Cabernet Sauvignon E-L Stage 26 Cap-fall complete.

MVEC Delaware E-L Stage 29 Berries pepper-corn size (4 mm diam.), bunch at right angles to stem.

MVEC Valvin Muscat E-L Stage 27 - 29 Setting; young berries enlarging (>2 mm diam.), bunch at right angles to stem to Berries peppercorn size (4 mm diam.); bunches tending downwards. — MVEC Valvin Muscat E-L Stage 27 – 29 Setting; young berries enlarging (>2 mm diam.), bunch at right angles to stem to Berries peppercorn size (4 mm diam.); bunches tending downwards.

MVEC Sunbelt E-L Stage 31 - 32 Berries pea-size (7 mm diam.) to Beginning of bunch closure, berries touching if berries are tight. — MVEC Sunbelt E-L Stage 31 – 32 Berries pea-size (7 mm diam.) to Beginning of bunch closure, berries touching if berries are tight.

MVEC Chambourcin E-L Stage 29 Berries pepper-corn size (4 mm diam.), bunch at right angles to stem.

W Catawba E-L Stage 27 - 29 Setting; young berries enlarging (>2 mm diam.), bunch at right angles to stem to Berries peppercorn size (4 mm diam.); bunches tending downwards. — W Catawba E-L Stage 27 – 29 Setting; young berries enlarging (>2 mm diam.), bunch at right angles to stem to Berries peppercorn size (4 mm diam.); bunches tending downwards.

NWV Arandel E-L Stage 29 Berries pepper-corn size (4 mm diam.), bunch at right angles to stem.

NWV Aromella E-L Stage 29 Berries pepper-corn size (4 mm diam.), bunch at right angles to stem.

R Seyval Blanc E-L Stage 29 - 31 Berries pepper-corn size (4 mm diam.), bunch at right angles to stem to Berries pea-size (7 mm diam). — R Seyval Blanc E-L Stage 29 – 31 Berries pepper-corn size (4 mm diam.), bunch at right angles to stem to Berries pea-size (7 mm diam).

R Catawba Stage 31 Berries pea size (7 mm diam.).

F Vignoles E-L Stage 26 Cap-fall complete.

F Chardonel E-L Stage 29 Berries pepper-corn size (4 mm diam.), bunch at right angles to stem.

F Traminette E-L Stage 26 - 27 26 Cap-fall complete to Setting; young berries enlarging (>2 mm diam.), bunch at right angles to stem. — F Traminette E-L Stage 26 – 27 26 Cap-fall complete to Setting; young berries enlarging (>2 mm diam.), bunch at right angles to stem.

F Cayuga White E-L Stage 29 - 31 Berries pepper-corn size (4 mm diam.), bunch at right angles to stem to Berries pea-size (7 mm diam). — F Cayuga White E-L Stage 29 – 31 Berries pepper-corn size (4 mm diam.), bunch at right angles to stem to Berries pea-size (7 mm diam).

D Concord E-L Stage 31 Berries pea-size (7 mm diam.).

D Vivant E-L Stage 29 Berries pepper-corn size (4 mm diam.), bunch at right angles to stem.

D Vidal Blanc E-L Stage 27 - 29 Setting; young berries enlarging (>2 mm diam.), bunch at right angles to stem to Berries peppercorn size (4 mm diam.); bunches tending downwards. — D Vidal Blanc E-L Stage 27 – 29 Setting; young berries enlarging (>2 mm diam.), bunch at right angles to stem to Berries peppercorn size (4 mm diam.); bunches tending downwards.

D Mars E-L Stage 23 27 - 31 Setting; young berries enlarging (>2 mm diam.), bunch at right angles to stem to Berries peppercorn size (4 mm diam.); bunches tending downwards to Berries pea size (7 mm diam.). — D Mars E-L Stage 23 27 – 31 Setting; young berries enlarging (>2 mm diam.), bunch at right angles to stem to Berries peppercorn size (4 mm diam.); bunches tending downwards to Berries pea size (7 mm diam.).