Grape phenology and GDD accumulation

June 3, 2011 by Marilyn Odneal

GDD base 50 accumulated since April 1 = 695 (+89 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

Shatter is occurring on some varieties.

Joe Rasmussen is recording phenology in the grape vineyards. He is working on his Vesta practicum for VIN 114.

N Traminette E-L Stage 21-27

N Vignoles E-L Stage 18-26

N Concord E-L Stage 27-29

N Sunbelt E-L Stage 27-29

N Norton E-L Stage 19-25

MVEC Chambourcin E-L Stage 25-27

W Catawba E-L Stage 26-29

R Cayuga White E-L Stage 25-29

R Vidal Blanc E-L Stage 25-27

R Seyval Blanc E-L Stage 25-27

R Catawba E-L Stage 27-29

L Chardonel E-L Stage 26-27