Paper · 1959 · American Journal of Enology and Viticulture

Fruit Set and Development in Seeded Grape Varieties as Affected by Defoliation, Topping, Girdling, and Other Treatments

B. G. Coombe

20
claims
43
verbatim quotes
70
citations
5
research areas
—
Not open access

Abstract

1. A method for analyzing the effects of treatments on berry set and size within different seed classes was found to be useful. 2. Partial defoliation during bloom reduced set and berry size. Treating shoot tips on partially defoliated vines with maleic hydrazide delayed shoot elongation; it increased set in one experiment, but not in another. 3. Pinching and topping shoots during bloom increased set 10 to 30 percent above that of control vines in six of seven experiments. If decreased the number of seeds per berry slightly, but did not reduce the berry weight within each seed class. Prebloom and postbloom toppings did not improve set. Repeated toppings reduced berry weight slightly. All topping treatments reduced pruning weight considerably, but, in the two years of the experiments, no harmful effects were noted. 4. Girdling increased set markedly. It increased fewer-seeded berries most, causing an increase in the number of seedess berries and/or a decrease in the number of seeds per seeded berry. It increased berry weight within each seed class up to 14 percent above that of the control. 5. Urea foliage sprays did not change set. In two of five experiments it increased berry weight 7.5 percent. When superimposed on girdling treatment, urea sprays sometimes increased and sometimes decreased set compared with girdled vines. 6. The effects of shading on fruit set and size were inconclusive, but leaves on shaded vines were larger and had more chlorophyll. 7. Gibberellic acid applied during bloom, in a single experiment, reduced set.

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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 20

Method / resourceobservedoriginal resultpositivemeasured

Claim · model-written summary

A method analyzing treatment effects within seed classes was useful.

Taxon
Grapet0
Outcome
usefule0

Not reportedComparator

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“A method for analyzing the effects of treatments on berry set and size within different seed classes was found to be useful.”

✓ located verbatim in the source · abstract, characters 3–127 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Partial defoliation during bloom reduced set and berry size.

Taxon
Grapet0
Treatment
Partial defoliation during bloome0
Outcome
set and berry sizee0
Direction
reducede0

Not reportedComparator

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“Partial defoliation during bloom reduced set and berry size.”

✓ located verbatim in the source · abstract, characters 131–191 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Maleic hydrazide on partially defoliated vines delayed shoot elongation.

Taxon
Grapet0
Treatment
maleic hydrazidee0
Outcome
shoot elongatione0
Direction
delayede0
Qualifier
partially defoliated vinese0

Not reportedComparator

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“Treating shoot tips on partially defoliated vines with maleic hydrazide delayed shoot elongation”

✓ located verbatim in the source · abstract, characters 192–288 · show in text ↑
Intervention effectobservedoriginal resultmixedmeasured

Claim · model-written summary

Maleic hydrazide increased set in one experiment but not another.

Taxon
Grapet0
Treatment
maleic hydrazidee0
Outcome
sete0
Direction
increasede0
Qualifier
in one experiment, but not in anothere0

Not reportedComparator

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“Treating shoot tips on partially defoliated vines with maleic hydrazide delayed shoot elongation; it increased set in one experiment, but not in another.”

✓ located verbatim in the source · abstract, characters 192–345 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Pinching and topping during bloom increased set by 10 to 30 percent in six of seven experiments.

Taxon
Grapet0
Treatment
Pinching and topping shoots during bloome0
Outcome
sete0
Direction
increasede0
Value
10 to 30 percente0
Qualifier
in six of seven experimentse0
Comparator
control vinese0

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“Pinching and topping shoots during bloom increased set 10 to 30 percent above that of control vines in six of seven experiments.”

✓ located verbatim in the source · abstract, characters 349–477 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Bloom shoot treatments slightly decreased seeds per berry.

Taxon
Grapet0
Treatment
Pinching and topping shoots during bloome0
Outcome
number of seeds per berrye1
Direction
decreasede1
Qualifier
slightlye1

Not reportedComparator

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“Pinching and topping shoots during bloom”

✓ located verbatim in the source · abstract, characters 349–389 · show in text ↑
e1

“If decreased the number of seeds per berry slightly”

✓ located verbatim in the source · abstract, characters 478–529 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Bloom shoot treatments did not reduce berry weight within seed classes.

Taxon
Grapet0
Treatment
Pinching and topping shoots during bloome0
Outcome
berry weighte1
Direction
did not reducee1
Qualifier
within each seed classe1

Not reportedComparator

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“Pinching and topping shoots during bloom”

✓ located verbatim in the source · abstract, characters 349–389 · show in text ↑
e1

“did not reduce the berry weight within each seed class”

✓ located verbatim in the source · abstract, characters 535–589 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Prebloom topping did not improve set.

Taxon
Grapet0
Treatment
Prebloome0
Outcome
sete0
Direction
did not improvee0

Not reportedComparator

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“Prebloom and postbloom toppings did not improve set.”

✓ located verbatim in the source · abstract, characters 591–643 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Postbloom topping did not improve set.

Taxon
Grapet0
Treatment
postbloom toppingse0
Outcome
sete0
Direction
did not improvee0

Not reportedComparator

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“Prebloom and postbloom toppings did not improve set.”

✓ located verbatim in the source · abstract, characters 591–643 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Repeated toppings slightly reduced berry weight.

Taxon
Grapet0
Treatment
Repeated toppingse0
Outcome
berry weighte0
Direction
reducede0
Qualifier
slightlye0

Not reportedComparator

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“Repeated toppings reduced berry weight slightly.”

✓ located verbatim in the source · abstract, characters 644–692 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

All topping treatments considerably reduced pruning weight.

Taxon
Grapet0
Treatment
All topping treatmentse0
Outcome
pruning weighte0
Direction
reducede0
Qualifier
considerablye0

Not reportedComparator

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“All topping treatments reduced pruning weight considerably”

✓ located verbatim in the source · abstract, characters 693–751 · show in text ↑
Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

No harmful topping effects were noted over two years.

Taxon
Grapet0
Treatment
All topping treatmentse0
Outcome
no harmful effects were notede0
Qualifier
in the two years of the experimentse0

Not reportedDirection

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“All topping treatments reduced pruning weight considerably, but, in the two years of the experiments, no harmful effects were noted.”

✓ located verbatim in the source · abstract, characters 693–825 · show in text ↑
Intervention effectobservedoriginal resultmixedmeasured

Claim · model-written summary

Girdling markedly increased set, particularly fewer-seeded berries, with increased seedless berries or decreased seeds per seeded berry.

Taxon
Grapet0
Treatment
Girdlinge0
Outcome
sete0
Direction
increasede0
Qualifier
It increased fewer-seeded berries most, causing an increase in the number of seedess berries and/or a decrease in the number of seeds per seeded berry.e0

Not reportedComparator

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“Girdling increased set markedly. It increased fewer-seeded berries most, causing an increase in the number of seedess berries and/or a decrease in the number of seeds per seeded berry.”

✓ located verbatim in the source · abstract, characters 829–1013 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Girdling increased berry weight within each seed class by up to 14 percent.

Taxon
Grapet0
Treatment
Girdlinge0
Outcome
berry weighte1
Direction
increasede1
Value
up to 14 percente1
Qualifier
within each seed classe1
Comparator
controle1

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“Girdling increased set markedly.”

✓ located verbatim in the source · abstract, characters 829–861 · show in text ↑
e1

“It increased berry weight within each seed class up to 14 percent above that of the control.”

✓ located verbatim in the source · abstract, characters 1014–1106 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Urea foliage sprays did not change set.

Taxon
Grapet0
Treatment
Urea foliage sprayse0
Outcome
sete0
Direction
did not changee0

Not reportedComparator

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“Urea foliage sprays did not change set.”

✓ located verbatim in the source · abstract, characters 1110–1149 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Urea increased berry weight 7.5 percent in two of five experiments.

Taxon
Grapet0
Treatment
Urea foliage sprayse0
Outcome
berry weighte0
Direction
increasede0
Value
7.5 percente0
Qualifier
In two of five experimentse0

Not reportedComparator

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“Urea foliage sprays did not change set. In two of five experiments it increased berry weight 7.5 percent.”

✓ located verbatim in the source · abstract, characters 1110–1215 · show in text ↑
Intervention effectobservedoriginal resultmixedmeasured

Claim · model-written summary

Urea on girdled vines sometimes increased and sometimes decreased set.

Taxon
Grapet0
Treatment
urea sprayse0
Outcome
sete0
Direction
sometimes increased and sometimes decreasede0
Qualifier
When superimposed on girdling treatmente0
Comparator
girdled vinese0

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“When superimposed on girdling treatment, urea sprays sometimes increased and sometimes decreased set compared with girdled vines.”

✓ located verbatim in the source · abstract, characters 1216–1345 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Shading effects on fruit set and size were inconclusive.

Taxon
Grapet0
Treatment
shadinge0
Outcome
fruit set and sizee0
Qualifier
inconclusivee0

Not reportedComparatorDirection

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“The effects of shading on fruit set and size were inconclusive”

✓ located verbatim in the source · abstract, characters 1349–1411 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Shaded vines had larger leaves with more chlorophyll.

Taxon
Grapet0
Treatment
shadede0
Outcome
leavese0
Direction
largere0
Qualifier
had more chlorophylle0

Not reportedComparator

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“leaves on shaded vines were larger and had more chlorophyll”

✓ located verbatim in the source · abstract, characters 1417–1476 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Gibberellic acid during bloom reduced set in one experiment.

Taxon
Grapet0
Treatment
Gibberellic acid applied during bloome0
Outcome
sete0
Direction
reducede0
Qualifier
in a single experimente0

Not reportedComparator

Verbatim

t0

“Grape”

✓ located verbatim in the source · title, characters 36–41 · show in text ↑
e0

“Gibberellic acid applied during bloom, in a single experiment, reduced set.”

✓ located verbatim in the source · abstract, characters 1481–1556 · show in text ↑

nitrogen · yield · VitisResults differ

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24 papers in the same direction as this paper · 8 in the opposite direction

  1. no effect
  2. negative
  3. no effect

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application · yield · VitisPositive and negative results

87 papers: 80 positive, 7 negative or no effect

79 papers in the same direction as this paper · 6 in the opposite direction · 1 reporting no difference from an alternative

  1. no effect
  2. negative
  3. negative

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pruning · yield · VitisPositive and negative results

107 papers: 71 positive, 36 negative or no effect

70 papers in the same direction as this paper · 36 in the opposite direction

  1. positive
  2. positive
  3. positive

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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.