Paper · 1970 · Journal of the American Society for Horticultural Science

The Effect of Succinic Acid 2,2-Dimethyl Hydrazide on the Uniform Maturity of Peaches and Nectarines12,3

Silviero Sansavini; Jean-Marie Martin; Kay Ryugo

11
claims
23
verbatim quotes
11
citations
4
research areas
✓
Open access · cc-by-nc-nd

Abstract

Abstract ‘Dixon’ and ‘Fay Elberta’ peach and ‘Independence’ nectarine trees were sprayed with succinic acid 2,2-dimethyl hydrazide (Alar) at the onset of pit hardening in the fruits. Distribution of ‘Dixon’ fruits by color at harvest revealed that the fruits on the lower and upper halves of the treated trees were more uniformly colored than those from non-sprayed trees. Furthermore, maturity was advanced approximately 6 days. Fruits from trees in which just the lower half was treated were, likewise, more uniform than the controls but maturity was advanced only 2 to 3 days. The advancement in maturity was evidenced by increased carotene, lower acid, and higher soluble solids. At the same stage of ripeness, fruits treated with Alar were firmer than those harvested from the check trees. The maturity of ‘Independence’ and ‘Fay Elberta’ fruits was advanced 2 and 5 days, respectively, by Alar treatments. The physical and chemical changes which accompanied the ripening processes were similar to those found in the ‘Dixon’ fruits. Concomitant with the earlier ripening induced by Alar, the rates of CO 2 and ethylene evolution began to increase early in the treated fruits.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. 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 11

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Fruits on lower and upper halves of Alar-treated 'Dixon' peach trees were more uniformly colored at harvest than fruits from non-sprayed trees.

Material
‘Dixon’e1
Treatment
sprayed with succinic acid 2,2-dimethyl hydrazide (Alar)e0
Outcome
uniformly colorede1
Direction
moree1
Comparator
non-sprayed treese1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Prunus persica
Prunus persica · TaxonAllagash Brewing · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“‘Dixon’ and ‘Fay Elberta’ peach and ‘Independence’ nectarine trees were sprayed with succinic acid 2,2-dimethyl hydrazide (Alar) at the onset of pit hardening”

✓ located verbatim in the source · abstract, characters 9–167 · show in text ↑
e1

“Distribution of ‘Dixon’ fruits by color at harvest revealed that the fruits on the lower and upper halves of the treated trees were more uniformly colored than those from non-sprayed trees”

✓ located verbatim in the source · abstract, characters 183–371 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Alar advanced maturity of 'Dixon' peach fruits by approximately 6 days.

Material
‘Dixon’e1
Treatment
sprayed with succinic acid 2,2-dimethyl hydrazide (Alar)e0
Outcome
maturitye2
Direction
advancede2
Value
approximately 6 dayse2

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Prunus persica
Prunus persica · TaxonAllagash Brewing · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“‘Dixon’ and ‘Fay Elberta’ peach and ‘Independence’ nectarine trees were sprayed with succinic acid 2,2-dimethyl hydrazide (Alar) at the onset of pit hardening”

✓ located verbatim in the source · abstract, characters 9–167 · show in text ↑
e1

“Distribution of ‘Dixon’ fruits by color at harvest revealed that the fruits on the lower and upper halves of the treated trees were more uniformly colored than those from non-sprayed trees”

✓ located verbatim in the source · abstract, characters 183–371 · show in text ↑
e2

“maturity was advanced approximately 6 days”

✓ located verbatim in the source · abstract, characters 386–428 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Fruits from trees with only the lower half treated were more uniform than the controls.

Treatment
just the lower half was treatede1
Outcome
more uniforme1
Direction
more uniforme1
Comparator
the controlse1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Prunus persica
Prunus persica · TaxonAllagash Brewing · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“‘Dixon’ and ‘Fay Elberta’ peach and ‘Independence’ nectarine trees were sprayed with succinic acid 2,2-dimethyl hydrazide (Alar) at the onset of pit hardening”

✓ located verbatim in the source · abstract, characters 9–167 · show in text ↑
e1

“Fruits from trees in which just the lower half was treated were, likewise, more uniform than the controls but maturity was advanced only 2 to 3 days”

✓ located verbatim in the source · abstract, characters 430–578 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

In trees with only the lower half treated, maturity was advanced only 2 to 3 days.

Treatment
just the lower half was treatede1
Outcome
maturitye1
Direction
advancede1
Value
2 to 3 dayse1
Comparator
the controlse1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Prunus persica
Prunus persica · TaxonAllagash Brewing · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“‘Dixon’ and ‘Fay Elberta’ peach and ‘Independence’ nectarine trees were sprayed with succinic acid 2,2-dimethyl hydrazide (Alar) at the onset of pit hardening”

✓ located verbatim in the source · abstract, characters 9–167 · show in text ↑
e1

“Fruits from trees in which just the lower half was treated were, likewise, more uniform than the controls but maturity was advanced only 2 to 3 days”

✓ located verbatim in the source · abstract, characters 430–578 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Alar treatment increased carotene in peach fruits as evidence of advanced maturity.

Treatment
sprayed with succinic acid 2,2-dimethyl hydrazide (Alar)e0
Outcome
carotenee1
Direction
increasede1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Prunus persica
Prunus persica · TaxonAllagash Brewing · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“‘Dixon’ and ‘Fay Elberta’ peach and ‘Independence’ nectarine trees were sprayed with succinic acid 2,2-dimethyl hydrazide (Alar) at the onset of pit hardening”

✓ located verbatim in the source · abstract, characters 9–167 · show in text ↑
e1

“increased carotene, lower acid, and higher soluble solids”

✓ located verbatim in the source · abstract, characters 625–682 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Alar treatment lowered acid in peach fruits as evidence of advanced maturity.

Treatment
sprayed with succinic acid 2,2-dimethyl hydrazide (Alar)e0
Outcome
acide1
Direction
lowere1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Prunus persica
Prunus persica · TaxonAllagash Brewing · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“‘Dixon’ and ‘Fay Elberta’ peach and ‘Independence’ nectarine trees were sprayed with succinic acid 2,2-dimethyl hydrazide (Alar) at the onset of pit hardening”

✓ located verbatim in the source · abstract, characters 9–167 · show in text ↑
e1

“increased carotene, lower acid, and higher soluble solids”

✓ located verbatim in the source · abstract, characters 625–682 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Alar treatment increased soluble solids in peach fruits as evidence of advanced maturity.

Treatment
sprayed with succinic acid 2,2-dimethyl hydrazide (Alar)e0
Outcome
soluble solidse1
Direction
highere1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Prunus persica
Prunus persica · TaxonAllagash Brewing · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“‘Dixon’ and ‘Fay Elberta’ peach and ‘Independence’ nectarine trees were sprayed with succinic acid 2,2-dimethyl hydrazide (Alar) at the onset of pit hardening”

✓ located verbatim in the source · abstract, characters 9–167 · show in text ↑
e1

“increased carotene, lower acid, and higher soluble solids”

✓ located verbatim in the source · abstract, characters 625–682 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

At the same stage of ripeness, Alar-treated fruits were firmer than fruits from check trees.

Treatment
treated with Alare1
Outcome
firmere1
Direction
firmere1
Comparator
check treese1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Prunus persica
Prunus persica · TaxonAllagash Brewing · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“‘Dixon’ and ‘Fay Elberta’ peach and ‘Independence’ nectarine trees were sprayed with succinic acid 2,2-dimethyl hydrazide (Alar) at the onset of pit hardening”

✓ located verbatim in the source · abstract, characters 9–167 · show in text ↑
e1

“fruits treated with Alar were firmer than those harvested from the check trees”

✓ located verbatim in the source · abstract, characters 715–793 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Alar advanced maturity of 'Independence' nectarine fruits by 2 days.

Material
‘Independence’e1
Treatment
Alar treatmentse1
Outcome
maturitye1
Direction
advancede1
Value
2e1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Prunus persica var. nucipersica
Prunus persica var. nucipersica · Taxon · picture of the speciesAllagash Brewing · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“‘Dixon’ and ‘Fay Elberta’ peach and ‘Independence’ nectarine trees were sprayed with succinic acid 2,2-dimethyl hydrazide (Alar) at the onset of pit hardening”

✓ located verbatim in the source · abstract, characters 9–167 · show in text ↑
e1

“The maturity of ‘Independence’ and ‘Fay Elberta’ fruits was advanced 2 and 5 days, respectively, by Alar treatments”

✓ located verbatim in the source · abstract, characters 795–910 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Alar advanced maturity of 'Fay Elberta' peach fruits by 5 days.

Material
‘Fay Elberta’e1
Treatment
Alar treatmentse1
Outcome
maturitye1
Direction
advancede1
Value
5 dayse1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Prunus persica
Prunus persica · TaxonAllagash Brewing · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“‘Dixon’ and ‘Fay Elberta’ peach and ‘Independence’ nectarine trees were sprayed with succinic acid 2,2-dimethyl hydrazide (Alar) at the onset of pit hardening”

✓ located verbatim in the source · abstract, characters 9–167 · show in text ↑
e1

“The maturity of ‘Independence’ and ‘Fay Elberta’ fruits was advanced 2 and 5 days, respectively, by Alar treatments”

✓ located verbatim in the source · abstract, characters 795–910 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

With earlier ripening induced by Alar, rates of CO2 and ethylene evolution began to increase early in the treated fruits.

Treatment
induced by Alare1
Outcome
rates of CO 2 and ethylene evolutione1
Direction
increasee1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Prunus persica
Prunus persica · TaxonAllagash Brewing · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“‘Dixon’ and ‘Fay Elberta’ peach and ‘Independence’ nectarine trees were sprayed with succinic acid 2,2-dimethyl hydrazide (Alar) at the onset of pit hardening”

✓ located verbatim in the source · abstract, characters 9–167 · show in text ↑
e1

“Concomitant with the earlier ripening induced by Alar, the rates of CO 2 and ethylene evolution began to increase early in the treated fruits”

✓ located verbatim in the source · abstract, characters 1038–1179 · show in text ↑

Daminozide · phenology · Prunus persica (peach)Positive and negative results

6 papers: 5 positive, 1 negative or no effect

4 papers in the same direction as this paper · 1 in the opposite direction

  1. positive
  2. no effect
  3. positive

2 papers more in this group

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Daminozide · quality: sugar starch · Prunus persica (peach)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
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application · quality: phytochemicals · Prunus persica (peach)Positive and negative results

4 papers: 3 positive, 1 negative or no effect

2 papers in the same direction as this paper · 1 in the opposite direction

  1. no effect
  2. positive
  3. positive
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application · phenology · Prunus persica (peach)Positive and negative results

10 papers: 7 positive, 3 negative or no effect

6 papers in the same direction as this paper · 3 in the opposite direction

  1. no effect
  2. negative
  3. no effect

6 papers more in this group

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application · quality: sugar starch · Prunus persica (peach)Positive and negative results

20 papers: 18 positive, 2 negative or no effect

17 papers in the same direction as this paper · 2 in the opposite direction

  1. negative
  2. no effect
  3. positive

16 papers more in this group

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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.