Grape phenology and GDD accumulation

October 29, 2012 by Marilyn Odneal

GDD base 50 accumulated since April 1 = +4064 (+496 departure from normal) at Mountain Grove http://agebb.missouri.edu/weather/reports/gddTable.asp

March 2012 GDD base 50: 306+4064 = 4370

Phenology stages according to the Modified E-L system http://door.uwex.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf

N Traminette E-L Stage 43

N Concord E-L Stage 46

N Sunbelt E-L Stage 47

N Norton E-L Stage 45

MVEC Chambourcin E-L Stage 44

W Catawba E-L Stage 45

R Vignoles E-L Stage 45

R Cayuga White E-L Stage 47

R Vidal Blanc E-L Stage 43

R Seyval Blanc E-L Stage 45

R Ctawaba E-L Stage 45

F Chardonel E-L Stage 45