Abstract
Fruit size of peaches is an important quality factor that can be optimized by adjusting the number of fruit on the tree by hand thinning 40 - 60 days after full bloom (dafb). Hand thinning is labor intensive and therefore the development of other strategies to reduce production cost is warranted. Since ethylene plays a key role in peach fruitlet abscission, it is hypothesized that foliar applications of ethephon will induce fruit abscission and increase fruit size. Ethephon (0 to 400 mg·L–1) was applied to “Redhaven” peach trees 45 - 50 days after full bloom in 2005 and 2007 to determine the efficacy and concentration required to induce fruit abscission. Abscission was linearly related to ethephon concentration and as a result reduced fruit set by 70% to 100 %. These data indicate that ethephon in the range of 100 - 200 mg·L–1 can be used to induce adequate levels of fruit abscission of ‘Redhaven’ peaches without inducing trunk or limb gummosis.
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Claims 3
Claim · model-written summary
Fruit abscission in peach was linearly related to ethephon concentration.
- Taxon
- peach
Prunus persicae0 - Treatment
- ethephon concentratione1
- Outcome
- Abscissione1
- Direction
- increaseinferrede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach trees 45 - 50 days after full bloom in 2005 and 2007”
e1“Abscission was linearly related to ethephon concentration and as a result reduced fruit set by 70% to 100 %”
Claim · model-written summary
Ethephon reduced peach fruit set by 70% to 100%.
- Taxon
- peachPrunus persicae0
- Treatment
- Ethephone1
- Outcome
- fruit sete2
- Direction
- reducede2
- Value
- 70% to 100 %e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach trees 45 - 50 days after full bloom in 2005 and 2007”
e1“Ethephon (0 to 400 mg·L–1) was applied to”
e2“Abscission was linearly related to ethephon concentration and as a result reduced fruit set by 70% to 100 %”
Claim · model-written summary
Ethephon at 100-200 mg·L–1 can be used to induce adequate fruit abscission in peach without trunk or limb gummosis.
- Taxon
- peachPrunus persicae0
- Treatment
- ethephone1
- Outcome
- adequate levels of fruit abscissione1
- Value
- 100 - 200 mg·L–1e1
- Qualifier
- without inducing trunk or limb gummosise2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach trees 45 - 50 days after full bloom in 2005 and 2007”
e1“ethephon in the range of 100 - 200 mg·L–1 can be used to induce adequate levels of fruit abscission”
e2“without inducing trunk or limb gummosis”
The same questions in other papers
(2-chloroethyl)phosphonic acid · yield · Prunus persica (peach)Results differ
7 papers in the same direction as this paper · 8 in the opposite direction · 1 reporting no difference from an alternative
- negative
- positive
- negative
13 papers more in this group
See all 17 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.