Abstract
Abstract A trial examined the effects of using ethephon or naphthalene acetic acid (NAA) alone or in combination to thin ‘Golden Delicious’ apples. All sprays were applied only at full bloom (FB). A factorial design was used with ethephon sprays of 0, 50, 100, and 200 mg/litre and NAA at 0, 5, 10, and 20 mg/litre with an additional treatment hand thinned just after FB. Ethephon applied alone thinned effectively at 100 or 200 mg/litre. NAA applied alone did not thin at any concentration. The three concentrations of NAA with ethephon at 50 mg/ litre improved thinning over the untreated control but not enough to significantly improve fruit weight and size. Ethephon alone at 100 mg/litre thinned very effectively and as well as any combination with NAA. Fruit weight and size were improved by all treatments using ethephon at 100 mg/litre. There was no advantage using ethephon at 200 mg/litre when compared to 100 mg/litre. Although there was some evidence that the combination of ethephon and NAA at the highest concentrations removed more fruit than ethephon alone at 200 mg/litre this was not reflected in better fruit weight or size. There is no advantage in adding NAA to ethephon to thin ‘Golden Delicious’ at FB and ethephon at 100 mg/litre would be the thinning spray of choice.
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Claims 9
Claim · model-written summary
Ethephon alone at 100 or 200 mg/litre effectively thinned apples.
- Taxon
- apples
Malus domesticat0 - Material
- Golden Delicioust0
- Treatment
- Ethephon applied alonee0
- Outcome
- thinned effectivelye0
- Direction
- thinned effectivelye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethephon applied alone thinned effectively at 100 or 200 mg/litre”
t0“Golden Delicious’ apples”
Claim · model-written summary
NAA alone did not thin apples at any tested concentration.
- Taxon
- applesMalus domesticat0
- Material
- Golden Delicioust0
- Treatment
- NAA applied alonee0
- Outcome
- thine0
- Direction
- did not thine0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NAA applied alone did not thin at any concentration”
t0“Golden Delicious’ apples”
Claim · model-written summary
NAA with ethephon at 50 mg/ litre improved thinning over untreated control.
- Taxon
- applesMalus domesticat0
- Material
- Golden Delicioust0
- Treatment
- The three concentrations of NAA with ethephon at 50 mg/ litree0
- Outcome
- thinninge0
- Direction
- improvede0
- Comparator
- untreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The three concentrations of NAA with ethephon at 50 mg/ litre improved thinning over the untreated control”
t0“Golden Delicious’ apples”
Claim · model-written summary
NAA with ethephon at 50 mg/ litre did not significantly improve fruit weight and size.
- Taxon
- applesMalus domesticat0
- Treatment
- NAA with ethephon at 50 mg/ litree1
- Outcome
- fruit weight and sizee0
- Direction
- not enough to significantly improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“not enough to significantly improve fruit weight and size”
t0“Golden Delicious’ apples”
e1“The three concentrations of NAA with ethephon at 50 mg/ litre improved thinning over the untreated control”
Claim · model-written summary
Ethephon alone at 100 mg/litre thinned as effectively as combinations with NAA.
- Taxon
- applesMalus domesticat0
- Treatment
- Ethephon alone at 100 mg/litree0
- Outcome
- thinned very effectivelye0
- Direction
- as well ase0
- Comparator
- any combination with NAAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethephon alone at 100 mg/litre thinned very effectively and as well as any combination with NAA”
t0“Golden Delicious’ apples”
Claim · model-written summary
All treatments with ethephon at 100 mg/litre improved fruit weight and size.
- Taxon
- applesMalus domesticat0
- Treatment
- ethephon at 100 mg/litree0
- Outcome
- Fruit weight and sizee0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit weight and size were improved by all treatments using ethephon at 100 mg/litre”
t0“Golden Delicious’ apples”
Claim · model-written summary
Ethephon at 200 mg/litre had no advantage over 100 mg/litre.
- Taxon
- applesMalus domesticat0
- Treatment
- ethephon at 200 mg/litree0
- Outcome
- no advantagee0
- Direction
- no advantagee0
- Comparator
- 100 mg/litree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no advantage using ethephon at 200 mg/litre when compared to 100 mg/litre”
t0“Golden Delicious’ apples”
Claim · model-written summary
The highest ethephon and NAA combination may have removed more fruit than ethephon alone at 200 mg/litre.
- Taxon
- applesMalus domesticat0
- Treatment
- combination of ethephon and NAA at the highest concentrationse0
- Outcome
- fruite0
- Direction
- removed moree0
- Comparator
- ethephon alone at 200 mg/litree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“some evidence that the combination of ethephon and NAA at the highest concentrations removed more fruit than ethephon alone at 200 mg/litre”
t0“Golden Delicious’ apples”
Claim · model-written summary
The authors recommend ethephon at 100 mg/litre for bloom thinning without added NAA.
Verbatim
e0“There is no advantage in adding NAA to ethephon to thin ‘Golden Delicious’ at FB and ethephon at 100 mg/litre would be the thinning spray of choice”
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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.