What's happening in the field?

At the Missouri State Fruit Experiment Station

Grape Phenology and GDD accumulation

by

GDD base 50 = 461 . We track GDD at http://agebb.missouri.edu/weather/reports/gddTable.asp and rate the phenology stages according to the Modified E-L System https://door.extension.wisc.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf

CH x CS E-L Stage E-L Stage 17 12 leaves separated; inflorescence well
developed, single flowers separated.
Research Seyval E-L Stage 19-20. 19 About 16 leaves separated; beginning of
flowering (first flower caps loosening).
20 10% caps off.
Winery Catawba E-L Stage 23-25. 23 17-20 leaves separated; 50% caps off. 25 80% caps off.
Foundation Chardonel E-L Stage 17 12 leaves separated; inflorescence well
developed, single flowers separated.
Foundation Traminette E-L Stage 17 12 leaves separated; inflorescence well
developed, single flowers separated.
Foundation Vidal Blanc E-L Stage 17 12 leaves separated; inflorescence well
developed, single flowers separated.
Foundation Orion E-L Stage 15 8 leaves separated, shoot elongating rapidly;
single flowers in compact groups.
Foundation NC-6 E-L Stage E-L Stage 15 8 leaves separated, shoot elongating rapidly;
single flowers in compact groups.
Foundation Norton E-L Stage 17 12 leaves separated; inflorescence well
developed, single flowers separated.
Foundation Chambourcin E-L Stage 17-18. 17 12 leaves separated; inflorescence well
developed, single flowers separated
18 14 leaves separated; flower caps still in place, but cap colour fading from green.
Foundation Vivant E-L Stage 16-17. 16 10 leaves separated
17 12 leaves separated; inflorescence well
developed, single flowers separated
MVEC Sunbelt E-L Stage 23 17-20 leaves separated; 50% caps off.
Genomics NC-65 E-L Stage 15 8 leaves separated, shoot elongating rapidly;
single flowers in compact groups.
Genomics Norton E-L Stage 17 12 leaves separated; inflorescence well
developed, single flowers separated.
Genomics J X V E-L Stage 17-18. 17 12 leaves separated; inflorescence well
developed, single flowers separated
18 14 leaves separated; flower caps still in place, but cap colour fading from green.
Genomics NC-6 E-L Stage 15 8 leaves separated, shoot elongating rapidly;
single flowers in compact groups.
Genomics J 70 E-L Stage 17 12 leaves separated; inflorescence well
developed, single flowers separated.
Foundation Vignoles E-L Stage 18 14 leaves separated; flower caps still in place,
but cap colour fading from green.
Research Seyval E-L Stage 19-20. 19 About 16 leaves separated; beginning of
flowering (first flower caps loosening).
20 10% caps off.
Research Catawba E-L Stage 20-21. 20 10% caps off. 21 30% caps off.
Research Norton E-L Stage 17 12 leaves separated; inflorescence well
developed, single flowers separated.
Norton North E-L Stage 18 14 leaves separated; flower caps still in place,
but cap colour fading from green.
New Winery Chambourcin E-L Stage 18 14 leaves separated; flower caps still in place,
but cap colour fading from green.
New Winery Norton E-L Stage 18 14 leaves separated; flower caps still in place, but cap colour fading from green.
MVEC Catawba E-L Stage 23 17-20 leaves separated; 50% caps off.