Abstract
For 4 years, `Redchief Delicious' apple [ Malus × sylvestris (L.) Mill. var. domestica (Borkh.) Mansf.] trees were treated with ethephon and/or Accel (6-BA + Gibberellins 4+7 ) when average fruit diameter was 5.0 to 11.4 mm. Effective thinning was obtained with ethephon at concentrations >500 mg·L -1 and with Accel at concentrations of 100 to 125 mg·L -1 . In only 1 year out of 4 did combinations of Accel plus ethephon reduce fruit set more than either material applied alone. Repeat applications of either material alone or in combination reduced fruit set no more than single applications. Fruit weight was negatively related to the number of fruit per tree. After adjusting fruit weight for number of fruit per tree at harvest with analysis of covariance, ethephon did not improve fruit weight at harvest, but Accel improved fruit weight in two of three experiments. The effect of combinations of Accel and ethephon on fruit weight was inconsistent. Chemical names used: 2-chloroethyl phosphonic acid (ethephon); polyothyethylleneploypropanol dihydroxy-propane 2, butoxyethanol (Regulaid); N-(phenylmethyl)-1H-purine-6-amine plus giberrellins A4 + A7 (Accel).
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Claims 8
Claim · model-written summary
Ethephon above 500 mg·L -1 effectively thinned apple fruit.
- Taxon
- apple
Malus domesticat0 - Treatment
- ethephon at concentrations >500 mg·L -1e0
- Outcome
- thinninge0
- Direction
- Effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effective thinning was obtained with ethephon at concentrations >500 mg·L -1”
t0“Apple”
Claim · model-written summary
Accel at 100 to 125 mg·L -1 effectively thinned apple fruit.
- Taxon
- appleMalus domesticat0
- Treatment
- Accel at concentrations of 100 to 125 mg·L -1e0
- Outcome
- thinninge0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effective thinning was obtained with ethephon at concentrations >500 mg·L -1 and with Accel at concentrations of 100 to 125 mg·L -1”
t0“Apple”
Claim · model-written summary
Combined Accel and ethephon reduced fruit set more than either alone in only one of four years.
- Taxon
- appleMalus domesticat0
- Treatment
- combinations of Accel plus ethephone0
- Outcome
- fruit sete0
- Direction
- reducee0
- Value
- 1 year out of 4e0
- Comparator
- either material applied alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In only 1 year out of 4 did combinations of Accel plus ethephon reduce fruit set more than either material applied alone.”
t0“Apple”
Claim · model-written summary
Repeated applications did not reduce fruit set beyond single applications.
- Taxon
- appleMalus domesticat0
- Treatment
- Repeat applicationse0
- Outcome
- fruit sete0
- Direction
- no more thane0
- Comparator
- single applicationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Repeat applications of either material alone or in combination reduced fruit set no more than single applications.”
t0“Apple”
Claim · model-written summary
Fruit weight was negatively related to fruit count per tree.
- Taxon
- appleMalus domesticat0
- Organ / stage
- fruite0
- Outcome
- Fruit weighte0
- Direction
- negativelye0
- Comparator
- number of fruit per treee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit weight was negatively related to the number of fruit per tree.”
t0“Apple”
Claim · model-written summary
After fruit-count adjustment, ethephon did not improve fruit weight at harvest.
- Taxon
- appleMalus domesticat0
- Treatment
- ethephone0
- Outcome
- fruit weight at harveste0
- Direction
- did not improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ethephon did not improve fruit weight at harvest”
t0“Apple”
Claim · model-written summary
After fruit-count adjustment, Accel improved fruit weight in two of three experiments.
- Taxon
- appleMalus domesticat0
- Treatment
- Accele0
- Outcome
- fruit weighte0
- Direction
- improvede0
- Value
- two of three experimentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Accel improved fruit weight in two of three experiments.”
t0“Apple”
Claim · model-written summary
The effect of combined Accel and ethephon on fruit weight varied across experiments.
- Taxon
- appleMalus domesticat0
- Treatment
- combinations of Accel and ethephone0
- Outcome
- fruit weighte0
- Qualifier
- inconsistente0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of combinations of Accel and ethephon on fruit weight was inconsistent.”
t0“Apple”
The same questions in other papers
(2-chloroethyl)phosphonic acid · yield · Malus domestica (apple)Results differ
43 papers in the same direction as this paper · 29 in the opposite direction
- no effect
- negative
- positive
69 papers more in this group
See all 73 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.