Claim · model-written summary
At 2 000 ppm ethephon removed 94% of Sultana clusters.
- Taxon
- grapee1
- Material
- Sultanae0
- Treatment
- ethephon at 2 000 ppme0
- Outcome
- clusterse0
- Direction
- removede0
- Value
- 94%e0
Not reportedGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier
Verbatim
e0“ethephon at 2 000 ppm removed 94%, 79%, 85% and 70% of the clusters of cvs Sultana, Riesling, Trebbiano and Ondenc respectively.”
e1“four grape cvs Riesling”
Title
Effects of ethephon on cluster loosening and berry composition of four wine grape cultivars
B.M. El-Zeftawi Journal of Horticultural Science 1982. doi:10.1080/00221589.1982.11515078
Other claims from this paper (11)
- Intervention effect Pre-harvest ethephon loosened grape clusters and berries.
- Intervention effect Ethephon increased fruit recovery by shaking compared with controls.
- Intervention effect At least 1 000 ppm ethephon reduced cluster pull force more effectively than lower concentrations after five to seven days.
- Observation Sultana gave the highest fruit recovery in the first season.
- Intervention effect Sultana alone responded to ethephon in both seasons, with a weaker response in the second.
- Intervention effect At 2 000 ppm ethephon removed 79% of Riesling clusters.
- Intervention effect At 2 000 ppm ethephon removed 85% of Trebbiano clusters.
- Intervention effect At 2 000 ppm ethephon removed 70% of Ondenc clusters.
- Intervention effect Ethephon at 500 ppm or higher caused defoliation that increased with concentration during the first 10-14 days.
- Intervention effect Ethephon did not kill or disbud grape canes.
- Intervention effect Ethephon accelerated natural autumn defoliation by about two weeks.