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Grape phenology and GDD accumulation

May 10, 2021 by Marilyn Odneal

F Cayuga White E-L Stage 9-12 Two to 3 leaves separated; shoots 2 – 4 cm long to 5 leaves separated; shoots about 10 cm long; inflorescence clear.

GDD base 50 = 239. We track GDD at  http://agebb.missouri.edu/weather/reports/gddTable.asp and rate the phenology stages according to the Modified E-L System http://door.uwex.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf Location Cultivar % primary bud mortality* North Norton 85 – 90% killed primaries Genomics Norton 85 – 90% killed … [Read more...] about Grape phenology and GDD accumulation

Filed Under: Grapes, Phenology

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  • Grape Phenology and GDD accumulation
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  • Grape Phenology and GDD accumulation

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