Abstract
An investigation was carried out for two consecutive years to study the suitability of 1-naphthaleneacetic acid (NAA) alone or in combination with calcium chloride (CaCl2) to control preharvest fruit drop and their effect on fruit quality of ‘Red Delicious’ apple (Malus pumila Mill.). The following five treatments combinations were tested: (1) control, the trees sprayed with water only; (2) a single spray with NAA; (3) two sprays with NAA at an interval of 14 d; (4) a single spray with NAA + CaCl2; and (5) two sprays with NAA + CaCl2 in combination at an interval of 14 d. NAA was sprayed at the rate of 20 mg L−1 and CaCl2 was sprayed at 3 g L−1. NAA applications reduced fruit drop appreciably when sprayed one month before harvest. The spray was effective in retaining the fruit on the tree for ∼14 d and the second spray after the 14 d of the first spray retained the fruit for another ∼14 d; however, the keeping quality of the fruit was reduced. No significant effect of CaCl2 sprays could be observed on maintaining the keeping quality of apple.
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Claims 5
Claim · model-written summary
NAA applications one month before harvest appreciably reduced fruit drop.
- Taxon
- apple
Malus domesticat0 - Treatment
- NAA applicationse0
- Outcome
- fruit drope0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NAA applications reduced fruit drop appreciably when sprayed one month before harvest.”
t0“‘Red Delicious’ apple”
Claim · model-written summary
A first NAA spray retained fruit on trees for about 14 days.
- Taxon
- appleMalus domesticat0
- Treatment
- The spraye0
- Outcome
- retaining the fruit on the treee0
- Direction
- retaininge0
- Value
- ∼14 de0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The spray was effective in retaining the fruit on the tree for ∼14 d”
t0“‘Red Delicious’ apple”
Claim · model-written summary
A second NAA spray retained fruit for about another 14 days.
- Taxon
- appleMalus domesticat0
- Treatment
- the second spraye0
- Outcome
- retained the fruite0
- Direction
- retainede0
- Value
- ∼14 de0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the second spray after the 14 d of the first spray retained the fruit for another ∼14 d; however, the keeping quality of the fruit was reduced.”
t0“‘Red Delicious’ apple”
Claim · model-written summary
The second spray reduced fruit keeping quality.
- Taxon
- appleMalus domesticat0
- Treatment
- the second spraye0
- Outcome
- keeping quality of the fruite0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the second spray after the 14 d of the first spray retained the fruit for another ∼14 d; however, the keeping quality of the fruit was reduced.”
t0“‘Red Delicious’ apple”
Claim · model-written summary
Calcium chloride sprays had no significant effect on keeping quality.
- Taxon
- appleMalus domesticae0
- Treatment
- CaCl2 sprayse0
- Outcome
- keeping quality of applee0
- Direction
- No significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant effect of CaCl2 sprays could be observed on maintaining the keeping quality of apple.”
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calcium chloride dihydrate · quality: postharvest · Malus domestica (apple)Results differ
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See all 74 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.