Abstract
Abstract Three years of observations were made at Oakville, California, on a vineyard trial of 3 pruning severities on 2 scion grape cultivars, Chardonnay and Gamay Beaujolais, grafted onto 2 phylloxera-resistant rootstocks, ‘St. George’ and ‘A × R #1’. There was a marked increase in crop production with decreased pruning severity. With ‘Chardonnay’ on ‘St. George’ there was nearly a 3-fold increase in yield when the pruning went from 5 retained buds/lb. (453.6g) of prunings to 15 buds/lb. With ‘Gamay Beaujolais’, the yield increase approached 2-fold. Vines on ‘A × R #1’ were markedly more fruitful than those on ‘St. George’, and this rootstock difference was not influenced by pruning severity over a 3-year period. The variability in level of pruning, as estimated from a visual inspection of individual vines, was great. This could account for both low yields and high vine sizes with ‘Chardonnay’. The pruning level used by an experienced pruner was about 8 retained buds/lb. of prunings on average-sized vines of ‘Chardonnay’ on ‘St. George’, and about 6 buds on the largest vines. The most severe pruning was very restrictive on yields per vine, and vine vigor was enhanced at these low bud counts. Fruit maturity was delayed by the least-severe pruning level and, in some instances, vine size was reduced the following year. Under the conditions of the test site, the intermediate level of pruning severity, 10 buds/lb. of prunings, was appropriate for the small-clustered, cane-pruned cultivars at the intermediate vine sizes.
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Claims 9
Claim · model-written summary
Decreased pruning severity increased crop production.
Not reportedComparatorSetting
Verbatim
t0“Wine Grape Cultivars”
e0“There was a marked increase in crop production with decreased pruning severity.”
Claim · model-written summary
Chardonnay on St. George yielded nearly threefold more at 15 than 5 retained buds per pound of prunings.
Verbatim
t0“Wine Grape Cultivars”
e0“With ‘Chardonnay’ on ‘St. George’ there was nearly a 3-fold increase in yield when the pruning went from 5 retained buds/lb. (453.6g) of prunings to 15 buds/lb.”
Claim · model-written summary
Gamay Beaujolais yield increase approached twofold with less severe pruning.
- Taxon
- Grapet0
- Material
- ‘Gamay Beaujolais’e0
- Treatment
- decreased pruning severitye1
- Outcome
- yielde0
- Direction
- increasee0
- Value
- 2-folde0
Not reportedComparator
Verbatim
t0“Wine Grape Cultivars”
e0“With ‘Gamay Beaujolais’, the yield increase approached 2-fold.”
e1“There was a marked increase in crop production with decreased pruning severity.”
Claim · model-written summary
A × R #1 vines were more fruitful than St. George vines regardless of pruning severity.
Verbatim
t0“Wine Grape Cultivars”
e0“Vines on ‘A × R #1’ were markedly more fruitful than those on ‘St. George’, and this rootstock difference was not influenced by pruning severity over a 3-year period.”
Claim · model-written summary
The most severe pruning restricted yield per vine.
Not reportedComparator
Verbatim
t0“Wine Grape Cultivars”
e0“The most severe pruning was very restrictive on yields per vine, and vine vigor was enhanced at these low bud counts.”
Claim · model-written summary
The most severe pruning enhanced vine vigor.
Not reportedComparator
Verbatim
t0“Wine Grape Cultivars”
e0“The most severe pruning was very restrictive on yields per vine, and vine vigor was enhanced at these low bud counts.”
Claim · model-written summary
The least severe pruning delayed fruit maturity.
Not reportedComparator
Verbatim
t0“Wine Grape Cultivars”
e0“Fruit maturity was delayed by the least-severe pruning level”
Claim · model-written summary
The least severe pruning sometimes reduced vine size the following year.
- Taxon
- Grapet0
- Treatment
- least-severe pruning levele1
- Outcome
- vine sizee0
- Direction
- reducede0
- Qualifier
- in some instancese0
Not reportedComparator
Verbatim
t0“Wine Grape Cultivars”
e0“in some instances, vine size was reduced the following year”
e1“Fruit maturity was delayed by the least-severe pruning level”
Claim · model-written summary
The authors judged 10 buds per pound appropriate for intermediate sized cane pruned cultivars at the test site.
Verbatim
t0“Wine Grape Cultivars”
e0“Under the conditions of the test site, the intermediate level of pruning severity, 10 buds/lb. of prunings, was appropriate for the small-clustered, cane-pruned cultivars at the intermediate vine sizes.”
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