GDD base 50 = 239. We track GDD at http://agebb.missouri.edu/weather/reports/gddTable.asp and rate the phenology stages according to the Modified E-L System http://door.uwex.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf
Location | Cultivar | % primary bud mortality* |
North | Norton | 85 – 90% killed primaries |
Genomics | Norton | 85 – 90% killed primaries |
Genomics | NC-6 | 35% killed primaries |
MVEC | Sunbelt | >95% killed primaries |
MVEC | Chambourcin | Not sure which are primaries and which are secondaries. |
West Catawba | Catawba | 100% primaries killed |
Winery | Chardonel | 75% primaries killed |
Research | Seyval Blanc | 100% primaries killed |
Research | Catawba | 100% primaries killed |
Research | Norton | >95% primaries killed |
Foundation | Vivant | 100% primaries killed (basal buds fruitful) |
Foundation | Norton | 85-90% primaries killed |
Foundation | Vignoles | 92% primaries killed |
Foundation | Chambourcin | 90-95% primaries killed |
Foundation | Chardonel | >95% primaries killed |
Foundation | Vidal Blanc | >95% primaries killed |
Foundation | Traminette | >95% primaries killed |
Foundation | Cayuga White | 100% primaries killed |
Demo | Concord | 60 – 70% primaries killed |
Demo | Mars | 70% primaries killed |
*This is based on an overall relative visual assessment, not an actual count.