Category Archives: Phenology

Grape phenology and GDD accumulation

GDD base 50 accumulated since April 1 = 1621 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 Cayuga White and Seyval Blanc are going in to veraison. Vignoles was defruited due to low vine size and will not …

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