Paper · 1974 · Journal of the American Society for Horticultural Science

Effects of SADH, Ethephon and 2,4,5-T on Color and Storage Quality of “McIntosh” Apples1

James E. Pollard

6
claims
11
verbatim quotes
13
citations
3
research areas
✓
Open access · cc-by-nc-nd

Abstract

Abstract Application of 2-chloroethylphosphonic acid (ethephon) to ‘McIntosh apples’ in late August significantly increased development of anthocyanins in fruit peel, shortening the time to harvest by approximately 2 weeks. At higher rates of ethephon, treatment with succinic acid 2,2-dimethyl hydrazide (SADH) prior to ethephon applications was necessary to maintain fruit firmness. 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) contributed to excessive fruit cracking on the tree and in storage. SADH treatments were more effective than 2,4,5-T treatments in reducing accumulation of ethylene in stored fruit. Ethephon 50 ppm with SADH was more effective in producing desired fruit color, quality, and abscission characteristics than was the higher concentration of ethephon with SADH and 2,4,5-T.

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 6

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Ethephon increased peel anthocyanin development.

Taxon
‘McIntosh apples’e0
Treatment
2-chloroethylphosphonic acid (ethephon)e0
Outcome
development of anthocyanins in fruit peele0
Direction
increasede0

Not reportedComparator

Verbatim

e0

“Application of 2-chloroethylphosphonic acid (ethephon) to ‘McIntosh apples’ in late August significantly increased development of anthocyanins in fruit peel”

✓ located verbatim in the source · abstract, characters 9–165 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Ethephon shortened harvest time by approximately two weeks.

Treatment
Ethephont0
Outcome
time to harveste0
Direction
shorteninge0
Value
approximately 2 weekse0

Not reportedComparator

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“shortening the time to harvest by approximately 2 weeks”

✓ located verbatim in the source · abstract, characters 167–222 · show in text ↑
t0

“Ethephon and 2,4,5-T on Color and Storage Quality of “McIntosh” Apples”

✓ located verbatim in the source · title, characters 17–87 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

SADH before higher ethephon rates was necessary to maintain firmness.

Treatment
succinic acid 2,2-dimethyl hydrazide (SADH)e0
Outcome
fruit firmnesse0
Qualifier
higher rates of ethephone0

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“At higher rates of ethephon, treatment with succinic acid 2,2-dimethyl hydrazide (SADH) prior to ethephon applications was necessary to maintain fruit firmness”

✓ located verbatim in the source · abstract, characters 224–383 · show in text ↑
t0

“Apples”

✓ located verbatim in the source · title, characters 81–87 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

2,4,5-T caused excessive fruit cracking on trees and during storage.

Treatment
2,4,5-trichlorophenoxyacetic acid (2,4,5-T)e0
Outcome
fruit crackinge0
Direction
excessivee0

Not reportedComparator

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“2,4,5-trichlorophenoxyacetic acid (2,4,5-T) contributed to excessive fruit cracking on the tree and in storage”

✓ located verbatim in the source · abstract, characters 385–495 · show in text ↑
t0

“Apples”

✓ located verbatim in the source · title, characters 81–87 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

SADH suppressed ethylene accumulation more effectively than 2,4,5-T.

Organ / stage
stored fruite0
Treatment
SADH treatmentse0
Outcome
accumulation of ethylenee0
Direction
reducinge0
Comparator
2,4,5-T treatmentse0

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“SADH treatments were more effective than 2,4,5-T treatments in reducing accumulation of ethylene in stored fruit”

✓ located verbatim in the source · abstract, characters 497–609 · show in text ↑
t0

“Apples”

✓ located verbatim in the source · title, characters 81–87 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Ethephon 50 ppm with SADH was better for color, quality and abscission than the higher concentration with SADH and 2,4,5-T.

Treatment
Ethephon 50 ppm with SADHe0
Outcome
fruit color, quality, and abscission characteristicse0
Direction
more effectivee0
Comparator
higher concentration of ethephon with SADH and 2,4,5-Te0

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Ethephon 50 ppm with SADH was more effective in producing desired fruit color, quality, and abscission characteristics than was the higher concentration of ethephon with SADH and 2,4,5-T”

✓ located verbatim in the source · abstract, characters 611–797 · show in text ↑
t0

“Apples”

✓ located verbatim in the source · title, characters 81–87 · show in text ↑

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4 papers in the same direction as this paper

  1. positive
  2. positive
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(2-chloroethyl)phosphonic acid · quality: postharvest · Malus domestica (apple)Results differ

32 papers: 26 positive, 6 negative or no effect

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

  1. positive
  2. positive
  3. negative

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(2-chloroethyl)phosphonic acid · yield · Malus domestica (apple)Results differ

73 papers: 44 positive, 29 negative or no effect

43 papers in the same direction as this paper · 29 in the opposite direction

  1. no effect
  2. negative
  3. positive

69 papers more in this group

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Daminozide · quality: postharvest · Malus domestica (apple)Positive and negative results

14 papers: 12 positive, 2 negative or no effect

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

  1. no effect
  2. no effect
  3. positive

10 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.