Abstract
The timing and concentration of dilute foliar sprays of gibberellic acid (GA 3 ) were tested for their flower bud thinning effect during three consecutive years on two common cultivars of peach [ Prunus persica (L.) Batsch.] grown in commercial culture under midwestern conditions. There was a strong trend for June sprays to minimize the total flower bud density (buds/cm shoot) of unbranched shoots on mature `Redhaven' and `Cresthaven' trees. The GA 3 treatments applied between early July and late October did not reduce the total flower bud density. Increasing the concentration from 25 or 50 mg·L -1 to 200 mg·L -1 tended to decrease total flower bud density, especially when applied May through July. During the same period the GA 3 treatments reduced total flower bud density of short shoots (<10 cm), but only about two-thirds as effectively as on long shoots. The `Redhaven' live flower density on trees treated in May, June or September was up to 2 times greater then the control in March following exposure to extreme fluctuations in winter temperatures to near critical lows in 1988 and 1989. Although 50 mg·L -1 GA 3 applied in June 1989 reduced total flower bud density by 70%, it resulted in a live flower density only 35% lower than the control. The treatment induced 2.3 times greater survival of the total flower buds existing after thinning when winter temperatures gradually declined to critical levels. The increased live flower density caused by the GA 3 sprays translated to a cropload 1.3 to 2.25 times greater than control. The length of neither fruiting quality shoots in the bearing canopy nor 1-year-old upright branched shoots in the top of trees (watersprouts) was appreciably affected by the GA 3 applications. GA 3 treatments at 100 and 200 mg·L -1 in late July and early August slightly delayed time of full bloom. Defoliation was delayed slightly by treatments applied in September and late July. Moderate doses of appropriately timed GA 3 sprays reduced flower bud densities without adverse effects on winter survival, yield, defoliation or bloom time. Our results support the use of GA 3 as a reliable peach thinning tool.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 14
Claim · model-written summary
June GA3 sprays showed a strong trend to minimize the total flower bud density of unbranched shoots on mature Redhaven and Cresthaven peach trees.
- Taxon
- Peach
Prunus persicat0 - Material
- `Redhaven' and `Cresthaven'e0
- Organ / stage
- unbranched shootse0
- Treatment
- June sprayse0
- Outcome
- total flower bud densitye0
- Direction
- minimizee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peach”
e0“There was a strong trend for June sprays to minimize the total flower bud density (buds/cm shoot) of unbranched shoots on mature `Redhaven' and `Cresthaven' trees”
Claim · model-written summary
GA3 treatments applied between early July and late October did not reduce total flower bud density.
- Taxon
- PeachPrunus persicat0
- Treatment
- GA 3 treatments applied between early July and late Octobere0
- Outcome
- total flower bud densitye0
- Direction
- did not reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peach”
e0“The GA 3 treatments applied between early July and late October did not reduce the total flower bud density”
Claim · model-written summary
Increasing the GA3 concentration from 25 or 50 to 200 mg/L tended to decrease total flower bud density, especially when applied May through July.
- Taxon
- PeachPrunus persicat0
- Treatment
- Increasing the concentration from 25 or 50 mg·L -1 to 200 mg·L -1e0
- Outcome
- total flower bud densitye0
- Direction
- tended to decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peach”
e0“Increasing the concentration from 25 or 50 mg·L -1 to 200 mg·L -1 tended to decrease total flower bud density, especially when applied May through July”
Claim · model-written summary
GA3 treatments reduced total flower bud density of short shoots (<10 cm), but only about two-thirds as effectively as on long shoots.
- Taxon
- PeachPrunus persicat0
- Organ / stage
- short shoots (<10 cm)e0
- Treatment
- GA 3 treatmentse0
- Outcome
- total flower bud densitye0
- Direction
- reducede0
- Value
- about two-thirds as effectivelye0
- Comparator
- long shootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peach”
e0“the GA 3 treatments reduced total flower bud density of short shoots (<10 cm), but only about two-thirds as effectively as on long shoots”
Claim · model-written summary
Redhaven live flower density on trees treated in May, June or September was up to 2 times greater than the control in March after extreme winter temperature fluctuations in 1988 and 1989.
- Taxon
- PeachPrunus persicat0
- Material
- `Redhaven'e0
- Treatment
- treated in May, June or Septembere0
- Outcome
- live flower densitye0
- Direction
- greatere0
- Value
- up to 2 timese0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peach”
e0“The `Redhaven' live flower density on trees treated in May, June or September was up to 2 times greater then the control in March”
Claim · model-written summary
A 50 mg/L GA3 spray applied in June 1989 reduced total flower bud density by 70%.
- Taxon
- PeachPrunus persicat0
- Treatment
- 50 mg·L -1 GA 3 applied in June 1989e0
- Outcome
- total flower bud densitye0
- Direction
- reducede0
- Value
- 70%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peach”
e0“Although 50 mg·L -1 GA 3 applied in June 1989 reduced total flower bud density by 70%”
Claim · model-written summary
The same 50 mg/L GA3 June 1989 treatment resulted in a live flower density only 35% lower than the control.
- Taxon
- PeachPrunus persicat0
- Treatment
- 50 mg·L -1 GA 3 applied in June 1989e0
- Outcome
- live flower densitye0
- Direction
- lowere0
- Value
- 35%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peach”
e0“Although 50 mg·L -1 GA 3 applied in June 1989 reduced total flower bud density by 70%, it resulted in a live flower density only 35% lower than the control”
Claim · model-written summary
The treatment induced 2.3 times greater survival of the total flower buds existing after thinning when winter temperatures gradually declined to critical levels.
- Taxon
- PeachPrunus persicat0
- Outcome
- survival of the total flower budse0
- Direction
- greatere0
- Value
- 2.3 timese0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peach”
e0“The treatment induced 2.3 times greater survival of the total flower buds existing after thinning when winter temperatures gradually declined to critical levels”
Claim · model-written summary
The increased live flower density caused by the GA3 sprays translated to a cropload 1.3 to 2.25 times greater than the control.
- Taxon
- PeachPrunus persicat0
- Treatment
- GA 3 sprayse0
- Outcome
- croploade0
- Direction
- greatere0
- Value
- 1.3 to 2.25 timese0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peach”
e0“The increased live flower density caused by the GA 3 sprays translated to a cropload 1.3 to 2.25 times greater than control”
Claim · model-written summary
The length of fruiting quality shoots in the bearing canopy and of 1-year-old upright branched shoots (watersprouts) in the top of trees was not appreciably affected by the GA3 applications.
- Taxon
- PeachPrunus persicat0
- Treatment
- GA 3 applicationse0
- Outcome
- length of neither fruiting quality shootse0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peach”
e0“The length of neither fruiting quality shoots in the bearing canopy nor 1-year-old upright branched shoots in the top of trees (watersprouts) was appreciably affected by the GA 3 applications”
Claim · model-written summary
GA3 treatments at 100 and 200 mg/L in late July and early August slightly delayed the time of full bloom.
- Taxon
- PeachPrunus persicat0
- Treatment
- GA 3 treatments at 100 and 200 mg·L -1 in late July and early Auguste0
- Outcome
- time of full bloome0
- Direction
- slightly delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peach”
e0“GA 3 treatments at 100 and 200 mg·L -1 in late July and early August slightly delayed time of full bloom”
Claim · model-written summary
Defoliation was delayed slightly by treatments applied in September and late July.
- Taxon
- PeachPrunus persicat0
- Treatment
- treatments applied in September and late Julye0
- Outcome
- Defoliatione0
- Direction
- delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peach”
e0“Defoliation was delayed slightly by treatments applied in September and late July”
Claim · model-written summary
Moderate doses of appropriately timed GA3 sprays reduced flower bud densities without adverse effects on winter survival, yield, defoliation or bloom time.
- Taxon
- PeachPrunus persicat0
- Treatment
- Moderate doses of appropriately timed GA 3 sprayse0
- Outcome
- flower bud densitiese0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peach”
e0“Moderate doses of appropriately timed GA 3 sprays reduced flower bud densities without adverse effects on winter survival, yield, defoliation or bloom time”
Claim · model-written summary
The authors conclude their results support the use of GA3 as a reliable peach thinning tool.
- Taxon
- peachPrunus persicae0
- Outcome
- reliable peach thinning toole0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our results support the use of GA 3 as a reliable peach thinning tool”
The same questions in other papers
Gibberellic acid · quality: general · Prunus persica (peach)Positive and negative results
1 in the opposite direction
- positive
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.