Claim · model-written summary
Early 2,4-D spray reduced summer fruit drop in all seasons.
- Taxon
- navel orange
Citrus sinensise1 - Treatment
- 10 or 20 ppm 2,4-dichlorophenoxyacetic acid (2,4-D)e0
- Outcome
- summer fruit drope0
- Direction
- reducede0
- Qualifier
- 5 to 9 weeks after midbloome0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A dilute spray of 10 or 20 ppm 2,4-dichlorophenoxyacetic acid (2,4-D), alone or in combination with 20 ppm gibberellic acid (GA) and applied 5 to 9 weeks after midbloom, reduced summer fruit drop in all seasons”
e1“navel orange [ Citrus sinensis (L.) Osbeck]”
Title
Growth Regulators, Fruit Drop, Yield, and Quality of Navel Orange in Florida
Jose Eduardo O. Lima; Frederick S. Davies Journal of the American Society for Horticultural Science 1984. doi:10.21273/jashs.109.1.81
Other claims from this paper (11)
- Observation Summer and summer-fall were major navel orange fruit-drop periods.
- Observation Fruit drop in 1981 ranged from 63 to 200 fruit per tree.
- Intervention effect Early 2,4-D plus GA spray reduced summer fruit drop in all seasons.
- Intervention effect The same materials at 13 weeks after midbloom did not reduce summer drop.
- Intervention effect 2,4-D at five weeks after midbloom increased 1981 yield.
- Intervention effect 2,4-D at five weeks did not increase 1982 yield.
- Intervention effect Midbloom GA plus 2,4-D increased fruit splitting in 1981.
- Intervention effect Midbloom GA plus 2,4-D increased summer-fall fruit drop in 1981.
- Intervention effect Growth regulator sprays generally did not adversely affect internal fruit quality.
- Intervention effect GA at 13 weeks after midbloom increased rind firmness.
- Intervention effect GA plus 2,4-D at 13 weeks increased rind firmness.