Grape Phenology and GDD accumulation

August 28, 2023 by Jennifer Morganthaler

GDD base 50 = 2835. We track GDD at http://agebb.missouri.edu/weather/reports/gddTable.asp and rate the phenology stages according to the Modified E-L System https://door.extension.wisc.edu/files/2010/10/ModifiedEichhornLorennzsystem.pd

Demo Concord E-L Stage 37 Berries not quite ripe

Demo Mars E-L Stage 37 Berries not quite ripe

Foundation Norton E-L Stage 36 Berries with intermediate sugar values

Genomics Norton E-L Stage 36 Berries with intermediate sugar values

MVEC Sunbelt E-L Stage 36 Berries with intermediate sugar values

North Norton E-L Stage 36 Berries with intermediate sugar values

Research Norton E-L Stage 36 Berries with intermediate sugar values