GDD base 50 accumulated since April 1 = 1714 (+229 departure from normal) at Mountain Grove 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 Veraison is beginning on Cayuga White. Japanese beetles or Japanese beetle injury was seen on Norton … [Read more...] about Grape phenology and GDD accumulation