What's happening in the field?

At the Missouri State Fruit Experiment Station

Grape Phenology and GDD accumulation

by

GDD base 50 = 495. 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 15-16 8 leaves separated, shoot longating rapidly;
single flowers in compact groups to 10 leaves separated
D Mars E-L Stage 16-17 10 leaves separated to 12 leaves separated; inflorescence well
developed, single flowers separated
D Concord E-L Stage 16-19 10 leaves separated to 12 leaves separated; inflorescence well developed, single flowers separated to 14 leaves separated; flower caps still in place, but cap colour fading from green to about 16 leaves separated; beginning of
flowering (first flower caps loosening)
F Vivant E-L Stage 16-19 10 leaves separated to 12 leaves separated; inflorescence well developed, single flowers separated to 14 leaves separated; flower caps still in place, but cap colour fading from green to about 16 leaves separated; beginning of
flowering (first flower caps loosening)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F Norton E-L Stage 17 12 leaves separated; inflorescence well
developed, single flowers separated
F Vignoles E-L Stage 16-17 10 leaves separated to 12 leaves separated; inflorescence well
developed, single flowers separated
F Chambourcin E-L Stage 16-17 10 leaves separated to 12 leaves separated; inflorescence well
developed, single flowers separated
F Chardonel E-l Stage 17-18 12 leaves separated; inflorescence well
developed, single flowers separated to
14 leaves separated; flower caps still in place,
but cap colour fading from green

 

 

 

 

 

 

 

 

 

 

F Vidal Blanc E-L Stage 16-17 16-17 10 leaves separated to 12 leaves separated; inflorescence well
developed, single flowers separated
F Traminette E-L Stage 16-17 10 leaves separated to 12 leaves separated; inflorescence well
developed, single flowers separated
F Cayuga White E-L Stage 17 12 leaves separated; inflorescence well
developed, single flowers separated
Research Norton E-L Stage 16 10 leaves separated

 

 

 

 

 

 

 

 

 

 

Research Catawba E-L Stage 16-17 10 leaves separated to 12 leaves separated; inflorescence well
developed, single flowers separated
Research Seyval Blanc E-L Stage 16-19 10 leaves separated to
12 leaves separated; inflorescence well
developed, single flowers separated to
14 leaves separated; flower caps still in place, but cap colour fading from green to about 16 leaves separated; beginning of
flowering (first flower caps loosening)
Winery Chardonel E-L Stage 17 12 leaves separated; inflorescence well
developed, single flowers separated
Winery Catawba E-L Stage 18-19 14 leaves separated; flower caps still in place, but cap colour fading from green to about 16 leaves separated; beginning of
flowering (first flower caps loosening)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Genomics NC-6 E-L Stage 14 7 leaves separated
Genomics Norton E-L Stage 15 8 leaves separated, shoot elongating rapidly;
single flowers in compact groups
MVEC Sunbelt E-L Stage 15-19 8 leaves separated, shoot elongating rapidly;
single flowers in compact groups
to 10 leaves separated
to 12 leaves separated; inflorescence well
developed, single flowers separated
to 14 leaves separated; flower caps still in place, but cap colour fading from green
to about 16 leaves separated; beginning of
flowering (first flower caps loosening)
MVEC Chambourcin E-L Stage 16 10 leaves separated