Grape phenology and GDD accumulation

August 1, 2011 by Marilyn Odneal

GDD base 50 accumulated since April 1 = 2390 (+344 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

Things are moving along. Some rots beginning due to the rain this weekend. We are close to harvest on Seyval Blanc and Cayuga White.

N Traminette E-L Stage 36

N Vignoles E-L Stage 36

N Concord E-L Stage 33-34

N Sunbelt E-L Stage 33-35

N Norton E-L Stage 33-34

MVEC Chambourcin E-L Stage 35-36

W Catawba E-L Stage 33-34

R Cayuga White E-L Stage 37

R Vidal Blanc E-L Stage 36-37

R Seyval Blanc E-L Stage 37

R Catawba E-L Stage 33-34

L Chardonel E-L Stage 36-37