Primary bud mortality in the Foundation Vineyard - What's happening in the field?

What's happening in the field?

At the Missouri State Fruit Experiment Station

Primary bud mortality in the Foundation Vineyard

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I finished recording primary bud mortality in the Foundation Vineyard. Pruning formulas will be adjusted based on the mortality percentages.

Cultivar % primary bud mortality*
Cayuga White 42%
Chambourcin 27%
Chardonel 30%
Traminette 5%
Vignoles ** 70%

*Primary bud mortality was based on a 100 bud sample of live wood.

**Vignoles had over 50% dead one-year-old wood and the bud sample collected was only 39 buds due to limited availability of live wood in the fruiting zone.