Abstract
Single or repeated sprays of up to 1,000 ppm ethephon ((2-chloroethyl)phosphonic acid) were applied to red raspberry (Rubus idaeus L. cv. Willamette) plants during the 1971, 1972 and 1973 harvest periods. Single ethephon sprays were followed by surges in fruit ripening, decreasing the total number of harvests required per season. The increased fruit ripeness corresponded to slightly decreased average fruit removal force among the fruit available for harvest. The enhancement of fruit ripening was greatest near the beginning of the harvest period. Repeated sprays did not improve the effects of ethephon, and both single and repeated sprays at concentrations from 250 to 1,000 ppm decreased the average fresh weight per berry by 10 to 15%. Fruit ripeness was also increased by extending the time between successive harvests from 3 to 5 days, but this was accompanied by increased fruit losses due to spontaneous fruit abscission during the interval between harvests. Repeated ethephon sprays in 1972 and 1973 did not increase the quantity of fruit recovered during mechanical harvests. It appears that the main potential for the use of ethephon in raspberry harvesting lies in its ability to control the timing and intensity of fruit ripening.
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Claims 10
Claim · model-written summary
Single ethephon sprays increased raspberry fruit ripening.
- Taxon
- red raspberry
_Rubus_idaeus_-_Feuillage.jpg?width=60)
Rubus idaeuse1 - Treatment
- Single ethephon sprayse0
- Outcome
- fruit ripeninge0
- Direction
- surgese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Rubus_idaeus_-_Feuillage.jpg?width=500)
Verbatim
e0“Single ethephon sprays were followed by surges in fruit ripening”
e1“red raspberry (Rubus idaeus L. cv. Willamette)”
Claim · model-written summary
Single ethephon sprays reduced the number of harvests required per season.
- Taxon
- red raspberryRubus idaeuse2
- Treatment
- Single ethephon sprayse1
- Outcome
- total number of harvests required per seasone0
- Direction
- decreasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreasing the total number of harvests required per season”
e1“Single ethephon sprays were followed by surges in fruit ripening”
e2“red raspberry (Rubus idaeus L. cv. Willamette)”
Claim · model-written summary
Increased ripeness coincided with slightly reduced fruit removal force.
- Taxon
- red raspberryRubus idaeuse1
- Organ / stage
- fruite0
- Outcome
- average fruit removal forcee0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increased fruit ripeness corresponded to slightly decreased average fruit removal force among the fruit available for harvest”
e1“red raspberry (Rubus idaeus L. cv. Willamette)”
Claim · model-written summary
Ethephon enhanced ripening most strongly near the start of harvest.
- Taxon
- red raspberryRubus idaeuse1
- Outcome
- enhancement of fruit ripeninge0
- Direction
- greateste0
- Qualifier
- near the beginning of the harvest periode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The enhancement of fruit ripening was greatest near the beginning of the harvest period”
e1“red raspberry (Rubus idaeus L. cv. Willamette)”
Claim · model-written summary
Repeated sprays did not improve ethephon effects.
- Taxon
- red raspberryRubus idaeuse1
- Treatment
- Repeated sprayse0
- Outcome
- effects of ethephone0
- Direction
- did not improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Repeated sprays did not improve the effects of ethephon”
e1“red raspberry (Rubus idaeus L. cv. Willamette)”
Claim · model-written summary
Single ethephon sprays of 250 to 1,000 ppm reduced fresh weight per berry by 10 to 15%.
- Taxon
- red raspberryRubus idaeuse1
- Treatment
- singlee0
- Outcome
- average fresh weight per berrye0
- Direction
- decreasede0
- Value
- 10 to 15%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both single and repeated sprays at concentrations from 250 to 1,000 ppm decreased the average fresh weight per berry by 10 to 15%”
e1“red raspberry (Rubus idaeus L. cv. Willamette)”
Claim · model-written summary
Repeated ethephon sprays of 250 to 1,000 ppm reduced fresh weight per berry by 10 to 15%.
- Taxon
- red raspberryRubus idaeuse1
- Treatment
- repeated sprays at concentrations from 250 to 1,000 ppme0
- Outcome
- average fresh weight per berrye0
- Direction
- decreasede0
- Value
- 10 to 15%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both single and repeated sprays at concentrations from 250 to 1,000 ppm decreased the average fresh weight per berry by 10 to 15%”
e1“red raspberry (Rubus idaeus L. cv. Willamette)”
Claim · model-written summary
Extending harvest intervals from 3 to 5 days increased fruit ripeness.
- Taxon
- red raspberryRubus idaeuse1
- Treatment
- extending the time between successive harvests from 3 to 5 dayse0
- Outcome
- Fruit ripenesse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit ripeness was also increased by extending the time between successive harvests from 3 to 5 days”
e1“red raspberry (Rubus idaeus L. cv. Willamette)”
Claim · model-written summary
Extending harvest intervals increased losses from spontaneous fruit abscission.
- Taxon
- red raspberryRubus idaeuse2
- Treatment
- extending the time between successive harvests from 3 to 5 dayse1
- Outcome
- fruit losses due to spontaneous fruit abscissione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this was accompanied by increased fruit losses due to spontaneous fruit abscission during the interval between harvests”
e1“extending the time between successive harvests from 3 to 5 days”
e2“red raspberry (Rubus idaeus L. cv. Willamette)”
Claim · model-written summary
Repeated ethephon sprays did not increase fruit recovered by mechanical harvest.
- Taxon
- red raspberryRubus idaeuse1
- Treatment
- Repeated ethephon sprayse0
- Outcome
- quantity of fruit recovered during mechanical harvestse0
- Direction
- did not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Repeated ethephon sprays in 1972 and 1973 did not increase the quantity of fruit recovered during mechanical harvests”
e1“red raspberry (Rubus idaeus L. cv. Willamette)”
The same questions in other papers
application · growth · Rubus idaeus (red raspberry)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →application · quality: postharvest · Rubus idaeus (red raspberry)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.