GDD base 50 accumulated since April 1 = 1304
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
Vivant was defruited due to low vine size and will not be included in the phenology at from this point until leaf fall.