Grape Phenology and GDD Accumulation - What's happening in the field?

Grape Phenology and GDD Accumulation

June 25, 2012 by Marilyn Odneal

GDD base 50 accumulated since April 1 = +1412 (+322 departure from normal) at Mountain Grove http://agebb.missouri.edu/weather/reports/gddTable.asp

March 2012 GDD base 50: 306+1412 = 1718

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

N Traminette E-L Stage 33

N Concord E-L Stage 33+

N Sunbelt E-L Stage 33+

N Norton E-L Stage 33

MVEC Chambourcin E-L Stage 33+

W Catawba E-L Stage 33

R Vignoles E-L Stage 33

R Cayuga White E-L Stage 34

R Vidal Blanc E-L Stage 33

R Seyval Blanc E-L Stage 34

R Catawba E-L Stage 33

D Chardonel E-L Stage 33