Claim · model-written summary
Urea on girdled vines sometimes increased and sometimes decreased set.
- Taxon
- Grapet0
- Treatment
- urea sprayse0
- Outcome
- sete0
- Direction
- sometimes increased and sometimes decreasede0
- Qualifier
- When superimposed on girdling treatmente0
- Comparator
- girdled vinese0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValue
Verbatim
t0“Grape”
e0“When superimposed on girdling treatment, urea sprays sometimes increased and sometimes decreased set compared with girdled vines.”
Title
B. G. Coombe American Journal of Enology and Viticulture 1959. doi:10.5344/ajev.1959.10.2.85
Other claims from this paper (19)
- Method / resource A method analyzing treatment effects within seed classes was useful.
- Intervention effect Partial defoliation during bloom reduced set and berry size.
- Intervention effect Maleic hydrazide on partially defoliated vines delayed shoot elongation.
- Intervention effect Maleic hydrazide increased set in one experiment but not another.
- Intervention effect Pinching and topping during bloom increased set by 10 to 30 percent in six of seven experiments.
- Intervention effect Bloom shoot treatments slightly decreased seeds per berry.
- Intervention effect Bloom shoot treatments did not reduce berry weight within seed classes.
- Intervention effect Prebloom topping did not improve set.
- Intervention effect Postbloom topping did not improve set.
- Intervention effect Repeated toppings slightly reduced berry weight.
- Intervention effect All topping treatments considerably reduced pruning weight.
- Observation No harmful topping effects were noted over two years.
- Intervention effect Girdling markedly increased set, particularly fewer-seeded berries, with increased seedless berries or decreased seeds per seeded berry.
- Intervention effect Girdling increased berry weight within each seed class by up to 14 percent.
- Intervention effect Urea foliage sprays did not change set.
- Intervention effect Urea increased berry weight 7.5 percent in two of five experiments.
- Intervention effect Shading effects on fruit set and size were inconclusive.
- Intervention effect Shaded vines had larger leaves with more chlorophyll.
- Intervention effect Gibberellic acid during bloom reduced set in one experiment.