Abstract
Abstract This reports a 1960-1964 study of the responses of ‘Concord’ grapevines, own-rooted as well as grafted on the phylloxera resistant rootstock ‘Couderc 3309’, to pruning severity, thinning of fruit, N fertilization and weed control in a factorial experiment at Fredonia, New York. Although phylloxera were present, moderate size of vine and large yield were attained with own-rooted vines. Here, ‘3309’ rootstock did not have a unique effect on ‘Concord’. As an initial response, in 1960, when the range in vine size was 1.8 to 3.0 lb. of cane prunings per vine, increases in vine size were associated with increased yield because fruitfulness was not then seriously depressed by the vine size increasing treatments of ‘3009’ rootstock, cultivation, and N fertilization. As an equilibrium response in 1963-1964, in the range in vine size of 1.9-4.9 lb. of cane prunings per vine, when vine size was above 3.5 lb. of cane prunings, the decline in fruitfulness prevented a gain in yield, and there was either no increase or a decrease in fruit maturity. A 1966 sequel, affording 8’ and 16’ of canopy length for each 8’ spaced vine, showed fruitfulness to be closely associated with node number per unit length of canopy. Where the canopy length is fixed, crowding was likely the basis for the declines in fruitfulness which accompanied increases in vine size and node number. The effect of the resistant rootstock ‘3309’ was similar to that of the other vine-size increasing treatments in that it decreased fruitfulness and fruit maturity and had a small effect on yield and on soluble solids/vine.
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Claims 8
Claim · model-written summary
Own-rooted Concord vines attained moderate size and large yield despite phylloxera presence.
- Taxon
- vinese0
- Material
- own-rooted vinese0
- Interactor
- phylloxera
Phylloxerae0pest - Outcome
- moderate size of vine and large yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although phylloxera were present, moderate size of vine and large yield were attained with own-rooted vines”
Claim · model-written summary
The 3309 rootstock had no unique effect on Concord.
Not reportedComparator
Verbatim
e0“Here, ‘3309’ rootstock did not have a unique effect on ‘Concord’”
Claim · model-written summary
In 1960, larger vines were associated with increased yield.
Not reportedTaxonMaterialGeneCompoundOrgan / stageInteractorTreatmentComparatorSetting
Verbatim
e0“in 1960, when the range in vine size was 1.8 to 3.0 lb. of cane prunings per vine, increases in vine size were associated with increased yield”
Claim · model-written summary
At equilibrium, vine size above 3.5 lb of cane prunings did not increase yield because fruitfulness declined.
Not reportedTaxonTreatment
Verbatim
e0“when vine size was above 3.5 lb. of cane prunings, the decline in fruitfulness prevented a gain in yield”
Claim · model-written summary
At equilibrium, larger vine size yielded no increase or a decrease in fruit maturity.
Not reportedTaxonMaterial
Verbatim
e0“there was either no increase or a decrease in fruit maturity”
Claim · model-written summary
Fruitfulness was closely associated with node number per unit canopy length.
Not reportedTaxonDirection
Verbatim
e0“fruitfulness to be closely associated with node number per unit length of canopy”
Claim · model-written summary
The 3309 rootstock decreased fruitfulness and fruit maturity.
- Treatment
- resistant rootstock ‘3309’e0
- Outcome
- fruitfulness and fruit maturitye0
- Direction
- decreasede0
- Comparator
- other vine-size increasing treatmentse0
Not reportedTaxon
Verbatim
e0“The effect of the resistant rootstock ‘3309’ was similar to that of the other vine-size increasing treatments in that it decreased fruitfulness and fruit maturity”
Claim · model-written summary
The 3309 rootstock had a small effect on yield and soluble solids per vine.
- Treatment
- resistant rootstock ‘3309’e0
- Outcome
- yield and on soluble solids/vinee0
- Comparator
- other vine-size increasing treatmentse0
Not reportedTaxonDirection
Verbatim
e0“The effect of the resistant rootstock ‘3309’ was similar to that of the other vine-size increasing treatments in that it decreased fruitfulness and fruit maturity and had a small effect on yield and on soluble solids/vine”