Preventing and Mitigating Low Temperature Injury in Grapevines
This presentation discusses strategies to prevent and reduce cold damage in grapevines, focusing on the effects of low temperatures on grape varieties such as Pinot Noir and Chardonnay. Recommendations include site selection, pruning timing, maintaining balanced vines, and monitoring crop load for optimal yield.
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Preventing and Mitigating Low Temp Injury (or Cold Damage) in Grapevines Ken Kupperman
Willamette Valley 2022 Season
25 days post freeze event
Pinot Noir damage 50- 70% primaries, Chardonnay 90%
Pinot Noir Compound Bud
Compound Buds Inside of single compound bud Multiple compound buds Damaged Damaged Survived Inflorescence primordia of primary bud Photo courtesy of Patty Skinkis, OSU
Crop Load (Ravaz Index) Vegetative (Canopy) Reproductive (Fruit) Yield Crop Load Location Optimum California 5 to 10 Oregon 3 to 6
Conclusions 1) Site Selection 1) Type of freeze event, how often 1) Delayed pruning, Chardonnay last 1) Keep cover crops low in vulnerable areas 1) Healthy balanced vines, nutrition-YANS, Ravaz index
