Claim · model-written summary
2,4-D sprays at full bloom did not increase fruit-set of Valencia orange.
- Taxon
- Valencia orange
Citrus sinensise1 - Treatment
- these sprayse1
- Outcome
- fruit-sete1
- Direction
- did not increasee1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“When applied to Valencia orange trees at full bloom, these sprays delayed blossom-drop 8-10 weeks, or more, but did not increase fruit-set”
Title
Some Effects of 2,4-Dichlorophenoxyacetic Acid on Fruit-Drop and Morphology of Oranges
W. S. Stewart; L. J. Klotz Botanical Gazette 1947. doi:10.1086/335464
Other claims from this paper (10)
- Intervention effect 2,4-D sprays at full bloom delayed blossom-drop of Valencia orange by 8-10 weeks or more.
- Intervention effect May applications of 2,4-D delayed the June drop of immature Washington Navel orange fruits by 6-8 weeks.
- Intervention effect May applications of 2,4-D did not increase yield of Washington Navel orange.
- Intervention effect Young Navel fruits sprayed with 25-225 p.p.m. 2,4-D developed seeds or seedlike structures, unlike unsprayed seedless fruits.
- Intervention effect Fruit sprayed with 225 p.p.m. 2,4-D developed a thick rind and grew excessively large with protruding navels.
- Intervention effect Fruit sprayed with 225 p.p.m. 2,4-D became cylindrical in shape.
- Intervention effect Valencia orange fruit treated in May with 2.25 p.p.m. 2,4-D developed a thick, pebbly rind.
- Intervention effect Valencia orange fruit treated in May with 2.25 p.p.m. 2,4-D became cylindrical and developed small navels.
- Intervention effect Sprays applied to mature Valencia orange trees decreased preharvest fruit-drop by as much as 78%.
- Recommendation The 2,4-D sprays are not recommended for commercial use on oranges until more data are available.