Abstract
The aim of this work was to study the effect of fall defoliation and chemical application on the progression and release of dormancy, and phenology, of low-chill peach ‘Flordaking’ under temperate climate conditions. At the onset of leaf fall, ‘Flordaking’ peach (Prunus persica L. Batsch) trees were defoliated or treated with hydrogen cyanamide (2.5 g L-1 a.i), norflurazon (46 g L-1 a.i.) or ethephon (20 mg L-1 a.i.). Untreated trees were used as the control. The rate of budbreak and the mean time to budbreak (MTB) was tested on stem isolates in a phytotron, whereas tree phenology and vegetative and reproductive traits were evaluated in a field experiment. Defoliation and chemical treatments significantly affected the rate of budbreak evolution of floral, but not of vegetative, buds. Treatments also significantly affected the evolution of the MTB of both vegetative and floral buds, but with a greater effect on the latter. In the field, the phenology of Flordaking was more affected by treatments that modified the depth of dormancy than those which affected the percentage of budbreak in excised shoots. Defoliation and hydrogen cyanamide treatments advanced sprouting (15 and ten days, respectively) and blooming (16 and four days, respectively), whereas ethephon delayed flowering and fruit set by three days each. Fall defoliation at the beginning of leaf abscission appears to be a strong tool to manipulate the evolution of dormancy and the time of spring bloom of Flordaking, mainly when insufficient chilling accumulation is forecasted.
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Claims 10
Claim · model-written summary
Defoliation and chemical treatments significantly affected the rate of budbreak evolution of floral buds in peach.
- Taxon
- Prunus persica
Prunus persicae2 - Treatment
- Defoliation and chemical treatmentse1
- Outcome
- rate of budbreak evolution of florale1
- Comparator
- Untreated treese3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Defoliation and chemical treatments significantly affected the rate of budbreak evolution of floral, but not of vegetative, buds”
e2“peach (Prunus persica L. Batsch) trees were defoliated or treated with hydrogen cyanamide (2.5 g L-1 a.i), norflurazon (46 g L-1 a.i.) or ethephon (20 mg L-1 a.i.)”
e3“Untreated trees were used as the control”
Claim · model-written summary
Defoliation and chemical treatments did not significantly affect the rate of budbreak evolution of vegetative buds in peach.
- Taxon
- Prunus persicaPrunus persicae2
- Treatment
- Defoliation and chemical treatmentse1
- Outcome
- rate of budbreak evolutione1
- Qualifier
- but not of vegetativee1
- Comparator
- Untreated treese3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Defoliation and chemical treatments significantly affected the rate of budbreak evolution of floral, but not of vegetative, buds”
e2“peach (Prunus persica L. Batsch) trees were defoliated or treated with hydrogen cyanamide (2.5 g L-1 a.i), norflurazon (46 g L-1 a.i.) or ethephon (20 mg L-1 a.i.)”
e3“Untreated trees were used as the control”
Claim · model-written summary
Defoliation advanced sprouting by 15 days in peach.
- Taxon
- Prunus persicaPrunus persicae2
- Treatment
- Defoliatione4
- Outcome
- sproutinge4
- Direction
- advancede4
- Value
- 15e4
- Qualifier
- days, respectivelye4
- Comparator
- Untreated treese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“peach (Prunus persica L. Batsch) trees were defoliated or treated with hydrogen cyanamide (2.5 g L-1 a.i), norflurazon (46 g L-1 a.i.) or ethephon (20 mg L-1 a.i.)”
e3“Untreated trees were used as the control”
e4“Defoliation and hydrogen cyanamide treatments advanced sprouting (15 and ten days, respectively) and blooming (16 and four days, respectively), whereas ethephon delayed flowering and fruit set by three days each”
Claim · model-written summary
Hydrogen cyanamide advanced sprouting by ten days in peach.
- Taxon
- Prunus persicaPrunus persicae2
- Treatment
- hydrogen cyanamidee4
- Outcome
- sproutinge4
- Direction
- advancede4
- Value
- tene4
- Qualifier
- days, respectivelye4
- Comparator
- Untreated treese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“peach (Prunus persica L. Batsch) trees were defoliated or treated with hydrogen cyanamide (2.5 g L-1 a.i), norflurazon (46 g L-1 a.i.) or ethephon (20 mg L-1 a.i.)”
e3“Untreated trees were used as the control”
e4“Defoliation and hydrogen cyanamide treatments advanced sprouting (15 and ten days, respectively) and blooming (16 and four days, respectively), whereas ethephon delayed flowering and fruit set by three days each”
Claim · model-written summary
Defoliation advanced blooming by 16 days in peach.
- Taxon
- Prunus persicaPrunus persicae2
- Treatment
- Defoliatione4
- Outcome
- bloominge4
- Direction
- advancede4
- Value
- 16e4
- Qualifier
- days, respectivelye4
- Comparator
- Untreated treese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“peach (Prunus persica L. Batsch) trees were defoliated or treated with hydrogen cyanamide (2.5 g L-1 a.i), norflurazon (46 g L-1 a.i.) or ethephon (20 mg L-1 a.i.)”
e3“Untreated trees were used as the control”
e4“Defoliation and hydrogen cyanamide treatments advanced sprouting (15 and ten days, respectively) and blooming (16 and four days, respectively), whereas ethephon delayed flowering and fruit set by three days each”
Claim · model-written summary
Hydrogen cyanamide advanced blooming by four days in peach.
- Taxon
- Prunus persicaPrunus persicae2
- Treatment
- hydrogen cyanamidee4
- Outcome
- bloominge4
- Direction
- advancede4
- Value
- foure4
- Qualifier
- days, respectivelye4
- Comparator
- Untreated treese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“peach (Prunus persica L. Batsch) trees were defoliated or treated with hydrogen cyanamide (2.5 g L-1 a.i), norflurazon (46 g L-1 a.i.) or ethephon (20 mg L-1 a.i.)”
e3“Untreated trees were used as the control”
e4“Defoliation and hydrogen cyanamide treatments advanced sprouting (15 and ten days, respectively) and blooming (16 and four days, respectively), whereas ethephon delayed flowering and fruit set by three days each”
Claim · model-written summary
Ethephon delayed flowering and fruit set by three days each in peach.
- Taxon
- Prunus persicaPrunus persicae2
- Treatment
- ethephone2
- Outcome
- flowering and fruit sete4
- Direction
- delayede4
- Value
- three days eache4
- Comparator
- Untreated treese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“peach (Prunus persica L. Batsch) trees were defoliated or treated with hydrogen cyanamide (2.5 g L-1 a.i), norflurazon (46 g L-1 a.i.) or ethephon (20 mg L-1 a.i.)”
e3“Untreated trees were used as the control”
e4“Defoliation and hydrogen cyanamide treatments advanced sprouting (15 and ten days, respectively) and blooming (16 and four days, respectively), whereas ethephon delayed flowering and fruit set by three days each”
Claim · model-written summary
Treatments significantly affected the mean time to budbreak of vegetative and floral buds, with a greater effect on floral buds.
- Taxon
- Prunus persicaPrunus persicae2
- Organ / stage
- vegetative and floral budse5
- Treatment
- Treatmentse5
- Outcome
- MTBe5
- Qualifier
- with a greater effect on the lattere5
- Comparator
- Untreated treese3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“peach (Prunus persica L. Batsch) trees were defoliated or treated with hydrogen cyanamide (2.5 g L-1 a.i), norflurazon (46 g L-1 a.i.) or ethephon (20 mg L-1 a.i.)”
e3“Untreated trees were used as the control”
e5“Treatments also significantly affected the evolution of the MTB of both vegetative and floral buds, but with a greater effect on the latter”
Claim · model-written summary
In the field, the phenology of Flordaking was more affected by treatments that modified dormancy depth than by treatments that affected budbreak percentage in excised shoots.
- Taxon
- Prunus persicaPrunus persicae2
- Material
- Flordakinge6
- Outcome
- phenologye6
- Qualifier
- more affected by treatments that modified the depth of dormancye6
- Setting
- In the fielde6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“peach (Prunus persica L. Batsch) trees were defoliated or treated with hydrogen cyanamide (2.5 g L-1 a.i), norflurazon (46 g L-1 a.i.) or ethephon (20 mg L-1 a.i.)”
e6“In the field, the phenology of Flordaking was more affected by treatments that modified the depth of dormancy than those which affected the percentage of budbreak in excised shoots”
Claim · model-written summary
Fall defoliation at leaf abscission is suggested as a strong tool to manipulate dormancy evolution and spring bloom time of Flordaking peach, mainly when insufficient chilling is forecasted.
- Taxon
- peachPrunus persicae2
- Treatment
- Fall defoliatione7
- Outcome
- the evolution of dormancye7
- Qualifier
- mainly when insufficient chilling accumulation is forecastede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“peach (Prunus persica L. Batsch) trees were defoliated or treated with hydrogen cyanamide (2.5 g L-1 a.i), norflurazon (46 g L-1 a.i.) or ethephon (20 mg L-1 a.i.)”
e7“Fall defoliation at the beginning of leaf abscission appears to be a strong tool to manipulate the evolution of dormancy and the time of spring bloom of Flordaking”
e6“mainly when insufficient chilling accumulation is forecasted”
The same questions in other papers
pruning · phenology · Prunus persica (peach)Positive and negative results
1 paper in the same direction as this paper · 11 in the opposite direction
- positive
- positive
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9 papers more in this group
See all 13 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.