Abstract
Vigorous, Geneva Double Curtain-trained Okanagan Riesling vines were subjected over a 2-yr period (1987–1988) to four canopy manipulation practices: shoot positioning; shoot positioning plus postbloom hedging to 12 leaves per shoot; basal leaf removal; and an untreated control, in combination with the presence or absence of iprodione (Rovral 50WP) fungicide sprays. Shoot positioning and shoot positioning plus hedging reduced weight of cane prunings relative to control vines in 1988, but increased yield, cluster weight, and berries per cluster. Shoot positioning, shoot positioning plus hedging, and basal leaf removal reduced °Brix in 1988, but tended to reduce titratable acidity in both seasons. Shoot positioning plus hedging reduced pH in 1987, while shoot positioning and shoot positioning plus hedging reduced pH and potassium (K + ) in 1988. Neither Rovral nor canopy manipulation appeared to have any significant impact on the percentage of bunch rot-affected clusters. Shoot positioning of Geneva Double Curtain-trained Okanagan Riesling is recommended as a method to reduce titratable acidity, pH and K + , hence improving potential winegrape quality.Key words: Vitis, grape, hedging, shoot positioning, leaf removal, canopy management
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Claims 16
Claim · model-written summary
Shoot positioning reduced weight of cane prunings relative to control vines in 1988.
Verbatim
e0“Okanagan Riesling vines”
e1“Shoot positioning and shoot positioning plus hedging reduced weight of cane prunings relative to control vines in 1988, but increased yield, cluster weight, and berries per cluster”
Claim · model-written summary
Shoot positioning plus hedging reduced weight of cane prunings relative to control vines in 1988.
Verbatim
e0“Okanagan Riesling vines”
e1“Shoot positioning and shoot positioning plus hedging reduced weight of cane prunings relative to control vines in 1988, but increased yield, cluster weight, and berries per cluster”
Claim · model-written summary
Shoot positioning increased yield, cluster weight and berries per cluster.
- Taxon
- Okanagan Rieslinge0
- Treatment
- Shoot positioninge1
- Outcome
- yield, cluster weight, and berries per clustere1
- Direction
- increasede1
- Qualifier
- in 1988e1
Not reportedComparator
Verbatim
e0“Okanagan Riesling vines”
e1“Shoot positioning and shoot positioning plus hedging reduced weight of cane prunings relative to control vines in 1988, but increased yield, cluster weight, and berries per cluster”
Claim · model-written summary
Shoot positioning plus hedging increased yield, cluster weight and berries per cluster.
- Taxon
- Okanagan Rieslinge0
- Treatment
- shoot positioning plus hedginge1
- Outcome
- yield, cluster weight, and berries per clustere1
- Direction
- increasede1
- Qualifier
- in 1988e1
Not reportedComparator
Verbatim
e0“Okanagan Riesling vines”
e1“Shoot positioning and shoot positioning plus hedging reduced weight of cane prunings relative to control vines in 1988, but increased yield, cluster weight, and berries per cluster”
Claim · model-written summary
Shoot positioning reduced °Brix in 1988.
- Taxon
- Okanagan Rieslinge0
- Treatment
- Shoot positioninge1
- Outcome
- °Brixe1
- Direction
- reducede1
- Qualifier
- in 1988e1
Not reportedComparator
Verbatim
e0“Okanagan Riesling vines”
e1“Shoot positioning, shoot positioning plus hedging, and basal leaf removal reduced °Brix in 1988, but tended to reduce titratable acidity in both seasons”
Claim · model-written summary
Shoot positioning plus hedging reduced °Brix in 1988.
- Taxon
- Okanagan Rieslinge0
- Treatment
- shoot positioning plus hedginge1
- Outcome
- °Brixe1
- Direction
- reducede1
- Qualifier
- in 1988e1
Not reportedComparator
Verbatim
e0“Okanagan Riesling vines”
e1“Shoot positioning, shoot positioning plus hedging, and basal leaf removal reduced °Brix in 1988, but tended to reduce titratable acidity in both seasons”
Claim · model-written summary
Basal leaf removal reduced °Brix in 1988.
- Taxon
- Okanagan Rieslinge0
- Treatment
- basal leaf removale1
- Outcome
- °Brixe1
- Direction
- reducede1
- Qualifier
- in 1988e1
Not reportedComparator
Verbatim
e0“Okanagan Riesling vines”
e1“Shoot positioning, shoot positioning plus hedging, and basal leaf removal reduced °Brix in 1988, but tended to reduce titratable acidity in both seasons”
Claim · model-written summary
Shoot positioning tended to reduce titratable acidity in both seasons.
- Taxon
- Okanagan Rieslinge0
- Treatment
- Shoot positioninge1
- Outcome
- titratable aciditye1
- Direction
- tended to reducee1
- Qualifier
- in both seasonse1
Not reportedComparator
Verbatim
e0“Okanagan Riesling vines”
e1“Shoot positioning, shoot positioning plus hedging, and basal leaf removal reduced °Brix in 1988, but tended to reduce titratable acidity in both seasons”
Claim · model-written summary
Shoot positioning plus hedging tended to reduce titratable acidity in both seasons.
- Taxon
- Okanagan Rieslinge0
- Treatment
- shoot positioning plus hedginge1
- Outcome
- titratable aciditye1
- Direction
- tended to reducee1
- Qualifier
- in both seasonse1
Not reportedComparator
Verbatim
e0“Okanagan Riesling vines”
e1“Shoot positioning, shoot positioning plus hedging, and basal leaf removal reduced °Brix in 1988, but tended to reduce titratable acidity in both seasons”
Claim · model-written summary
Basal leaf removal tended to reduce titratable acidity in both seasons.
- Taxon
- Okanagan Rieslinge0
- Treatment
- basal leaf removale1
- Outcome
- titratable aciditye1
- Direction
- tended to reducee1
- Qualifier
- in both seasonse1
Not reportedComparator
Verbatim
e0“Okanagan Riesling vines”
e1“Shoot positioning, shoot positioning plus hedging, and basal leaf removal reduced °Brix in 1988, but tended to reduce titratable acidity in both seasons”
Claim · model-written summary
Shoot positioning plus hedging reduced pH in 1987.
- Taxon
- Okanagan Rieslinge0
- Treatment
- Shoot positioning plus hedginge1
- Outcome
- pHe1
- Direction
- reducede1
- Qualifier
- in 1987e1
Not reportedComparator
Verbatim
e0“Okanagan Riesling vines”
e1“Shoot positioning plus hedging reduced pH in 1987, while shoot positioning and shoot positioning plus hedging reduced pH and potassium (K + ) in 1988”
Claim · model-written summary
Shoot positioning reduced pH and potassium in 1988.
- Taxon
- Okanagan Rieslinge0
- Treatment
- shoot positioninge1
- Outcome
- pH and potassium (K + )e1
- Direction
- reducede1
- Qualifier
- in 1988e1
Not reportedComparator
Verbatim
e0“Okanagan Riesling vines”
e1“Shoot positioning plus hedging reduced pH in 1987, while shoot positioning and shoot positioning plus hedging reduced pH and potassium (K + ) in 1988”
Claim · model-written summary
Shoot positioning plus hedging reduced pH and potassium in 1988.
- Taxon
- Okanagan Rieslinge0
- Treatment
- shoot positioning plus hedginge1
- Outcome
- pH and potassium (K + )e1
- Direction
- reducede1
- Qualifier
- in 1988e1
Not reportedComparator
Verbatim
e0“Okanagan Riesling vines”
e1“Shoot positioning plus hedging reduced pH in 1987, while shoot positioning and shoot positioning plus hedging reduced pH and potassium (K + ) in 1988”
Claim · model-written summary
Rovral (iprodione) sprays did not have a significant impact on the percentage of bunch rot-affected clusters.
- Taxon
- Okanagan Rieslinge0
- Treatment
- Rovrale1
- Outcome
- percentage of bunch rot-affected clusterse1
- Direction
- significant impacte1
Not reportedComparator
Verbatim
e0“Okanagan Riesling vines”
e1“Neither Rovral nor canopy manipulation appeared to have any significant impact on the percentage of bunch rot-affected clusters”
Claim · model-written summary
Canopy manipulation did not have a significant impact on the percentage of bunch rot-affected clusters.
- Taxon
- Okanagan Rieslinge0
- Treatment
- canopy manipulatione1
- Outcome
- percentage of bunch rot-affected clusterse1
- Direction
- significant impacte1
Not reportedComparator
Verbatim
e0“Okanagan Riesling vines”
e1“Neither Rovral nor canopy manipulation appeared to have any significant impact on the percentage of bunch rot-affected clusters”
Claim · model-written summary
Shoot positioning of Geneva Double Curtain-trained Okanagan Riesling is recommended to reduce titratable acidity, pH and K+, thereby improving potential winegrape quality.
Verbatim
e1“Shoot positioning of Geneva Double Curtain-trained Okanagan Riesling is recommended as a method to reduce titratable acidity, pH and K + , hence improving potential winegrape quality”