What's happening in the field?

At the Missouri State Fruit Experiment Station

Grape Phenology and GDD accumulation

by

GDD base 50 = 698. We track GDD at http://agebb.missouri.edu/weather/reports/gddTable.asp and rate the phenology stages according to the Modified E-L atages according to the Modified E-L Ststem https://door.extension.wisc.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf

N Norton E-L Stage 21-23 30% caps off to 17-20 leaves separated; 50% caps off (= flowering)
D Mars E-L Stage 23 23 17-20 leaves separated; 50% caps off (= flowering)
D Concord E-L Stage 27-29 27 Setting; young berries enlarging (>2 mm
diam.), bunch at right angles to stem to Berries pepper-corn size (4 mm diam.);
bunches tending downwards
F Vivant E-L Stage 27 Setting; young berries enlarging (>2 mm
diam.), bunch at right angles to stem

 

 

 

 

 

 

 

 

 

 

 

F Norton E-L Stage 21-23 30% caps off to 17-20 leaves separated; 50% caps off (= flowering)
F Vignoles E-L Stage 25-27 80% caps off to Cap-fall complete to Setting; young berries enlarging (>2 mm
diam.), bunch at right angles to stem
F Chambourcin E-L Stage 25-27 80% caps off to Cap-fall complete to Setting; young berries enlarging (>2 mm
diam.), bunch at right angles to stem
F Chardonel E-L Stage 25-27 80% caps off to Cap-fall complete to Setting; young berries enlarging (>2 mm
diam.), bunch at right angles to stem
F Vidal Blanc E-L Stage 25-27 80% caps off to Cap-fall complete to Setting; young berries enlarging (>2 mm
diam.), bunch at right angles to stem
F Traminette E-L Stage 25 80% caps off
F Cayuga White E-L Stage 25-27 80% caps off to Cap-fall complete to Setting; young berries enlarging (>2 mm
diam.), bunch at right angles to stem
R Norton E-L Stage 20-21 10% caps off to 30% caps off to 17-20 leaves separated; 50% caps off
(= flowering)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R Catawba E-L Stage 27 Setting; young berries enlarging (>2 mm
diam.), bunch at right angles to stem
R Seyval Blanc E-L Stage 25-27 80% caps off to Cap-fall complete to Setting; young berries enlarging (>2 mm
diam.), bunch at right angles to stem
W Chardonel E-L Stage 25-27 80% caps off to Cap-fall complete to Setting; young berries enlarging (>2 mm
diam.), bunch at right angles to stem
W Catawba E-L Stage 27 Setting; young berries enlarging (>2 mm
diam.), bunch at right angles to stem

 

 

 

 

 

 

 

 

 

 

 

 

 

Genomics NC-6 E-L Stage 21 30% caps off
Genomics Norton E-L Stage 23-27 17-20 leaves separated; 50% caps off (= flowering) to 80% caps off to Cap-fall complete to Setting; young berries enlarging (>2 mm
diam.), bunch at right angles to stem
MVEC Sunbelt E-L Stage 27-31 Setting; young berries enlarging (>2 mm
diam.), bunch at right angles to stem to Berries pepper-corn size (4 mm diam.);
bunches tending downwards to Berries pea-size (7 mm diam.)
MVEC Chambourcin E-L Stage 25-27 80% caps off to Cap-fall complete to Setting; young berries enlarging (>2 mm
diam.), bunch at right angles to stem