Grape phenology and GDD accumulation

July 15, 2019 by Marilyn Odneal

GDD base 50 accumulation for today = 1623 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

1. N Norton E-L Stage 33 Berries still hard and green.

2. G Norton E-L Stage 33 Berries still hard and green.

3. G Cabernet Sauvignon E-L Stage 33 Berries still hard and green.

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

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

6. W Catawba E-L Stage 32 - 33 Berries still hard and green. — 6. W Catawba E-L Stage 32 – 33 Berries still hard and green.

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

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

9. R Seyval Blanc E-L Stage 34 Berries begin to soften.

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

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

12. F Norton E-L Stage 33 Berries still hard and green.

13. F Vignoles E-L Stage 34 Berries begin to soften.

14. F Chardonel E-L 33 Berries still hard and green.

15. F Vidal Blanc E-L Stage 33 Berries still hard and green.

16. F Traminette E-L Stage 33 Berries still hard and green.

17. F Cayuga White E-L Stage 34 Berries begin to soften.

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

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

20. D Mars E-L Stage 34 - 35 Berries begin to soften to Berries begin to colour and enlarge. — 20. D Mars E-L Stage 34 – 35 Berries begin to soften to Berries begin to colour and enlarge.