Claim · model-written summary
NAA retarded apple fruit growth, most markedly when applied later than two weeks after petal fall.
- Taxon
- Apples
Malus domesticat0 - Treatment
- NAAe4
- Outcome
- fruit growthe4
- Direction
- retarde4
- Qualifier
- particularly marked when the spray is applied later than two weeks after petal-falle5
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“Fruit Set and Fruit Development in Apples”
e4“As a thinning agent, NAA has the disadvantage that it tends to retard fruit growth”
e5“This effect is particularly marked when the spray is applied later than two weeks after petal-fall”
Title
L. C. Luckwill Journal of Horticultural Science 1953. doi:10.1080/00221589.1953.11513768
Other claims from this paper (7)
- Intervention effect NAA spraying of trees at full bloom reduced fruit set in apple.
- Intervention effect Spraying open flowers with NAA before pollination induced incompatibility between pollen tubes and stylar tissue.
- Intervention effect Spraying after petal fall caused abortion of a large proportion of developing seeds.
- Intervention effect Spraying after petal fall led to an abnormally large drop of young fruitlets.
- Observation Seeds were susceptible to NAA damage only while the endosperm was in the free nuclear stage.
- Intervention effect Early NAA application may permanently stunt apple foliage in certain varieties.
- Intervention effect No NAA thinning treatment on individual branches of Miller’s Seedling induced fruit bud differentiation in the on year.