Abstract
The study was conducted to determine the efficacy of hexanal applied either as pre-harvest spray or post-harvest dip in enhancing the shelf life of banana var. Grand Nain. The study was done in Meru County (high potential zone) and Machakos County (low potential zone) of Kenya. Two hexanal concentrations (2 % and 3 %) were sprayed either once (at 30 days) or twice (at 30 days and 15 days) before harvest. Observations of how long the fruits stayed on the tree between the treated and untreated ones, was based on the duration taken for 20% of the fruits per bunch to ripen. Once ripe, the fruits were harvested and analysed. For the post-harvest dip treatment, fruits harvested at the mature green stage were dipped in 2 % hexanal, 3 % hexanal, or water (control) for 2.5 minutes or 5 minutes. The fruits were allowed to ripen at ambient room conditions (25 ± 1oC and RH 60 ± 5%). Physiological and physico-chemical parameters associated with fruit ripening were evaluated at 3-day intervals. An interaction between zone of production and mode of application had a significant effect (p <0.05) on fruit retention. Hexanal applied twice as a spray significantly (p < 0.05) improved fruit retention by 12 days and 18 days in Machakos and Meru Counties, respectively. Post-harvest dip treatments enhanced fruit shelf life by 9 days (5-minute dip) and 6 days (2.5-minute dip) compared to 6 days for bananas sprayed twice. Respiration rate, ethylene production, and fruit softening were significantly (p < 0.05) delayed by hexanal treatment. Progression of other ripening-related changes including increases in total titratable acidity, 0Brix, and vitamin C were slower in fruits treated with hexanal. Overall, these findings indicate that hexanal applied either as a pre-harvest spray (30 days and 15 days before harvest) or a post-harvest dip (5 minutes) has the potential to enhance banana shelf life besides improving fruit retention on the tree by 12-18 days when applied as pre-harvest spray.
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Claims 10
Claim · model-written summary
Production zone and application mode interacted significantly for fruit retention.
Verbatim
e0“An interaction between zone of production and mode of application had a significant effect (p <0.05) on fruit retention.”
t0“banana fruits (Musa acuminata)”
Claim · model-written summary
Twice sprayed hexanal improved fruit retention by 12 days in Machakos.
- Taxon
- bananat0
- Organ / stage
- fruitst0
- Treatment
- Hexanal applied twice as a spraye0
- Outcome
- fruit retentione0
- Direction
- improvede0
- Value
- 12 dayse0
- Setting
- Machakose0
Not reportedComparator
Verbatim
e0“Hexanal applied twice as a spray significantly (p < 0.05) improved fruit retention by 12 days and 18 days in Machakos and Meru Counties, respectively.”
t0“banana fruits (Musa acuminata)”
Claim · model-written summary
Twice sprayed hexanal improved fruit retention by 18 days in Meru.
- Taxon
- bananat0
- Organ / stage
- fruitst0
- Treatment
- Hexanal applied twice as a spraye0
- Outcome
- fruit retentione0
- Direction
- improvede0
- Value
- 18 dayse0
- Setting
- Meru Countiese0
Not reportedComparator
Verbatim
e0“Hexanal applied twice as a spray significantly (p < 0.05) improved fruit retention by 12 days and 18 days in Machakos and Meru Counties, respectively.”
t0“banana fruits (Musa acuminata)”
Claim · model-written summary
A five-minute postharvest dip extended shelf life by nine days.
Verbatim
e0“Post-harvest dip treatments enhanced fruit shelf life by 9 days (5-minute dip) and 6 days (2.5-minute dip) compared to 6 days for bananas sprayed twice.”
t0“banana fruits (Musa acuminata)”
Claim · model-written summary
A two-and-a-half-minute postharvest dip extended shelf life by six days.
Verbatim
e0“Post-harvest dip treatments enhanced fruit shelf life by 9 days (5-minute dip) and 6 days (2.5-minute dip) compared to 6 days for bananas sprayed twice.”
t0“banana fruits (Musa acuminata)”
Claim · model-written summary
Twice sprayed bananas had a six-day shelf-life increase.
- Taxon
- bananat0
- Organ / stage
- fruitst0
- Treatment
- bananas sprayed twicee0
- Outcome
- fruit shelf lifee0
- Direction
- enhancede0
- Value
- 6 dayse0
Not reportedComparator
Verbatim
e0“Post-harvest dip treatments enhanced fruit shelf life by 9 days (5-minute dip) and 6 days (2.5-minute dip) compared to 6 days for bananas sprayed twice.”
t0“banana fruits (Musa acuminata)”
Claim · model-written summary
Hexanal significantly delayed respiration rate.
- Taxon
- bananat0
- Organ / stage
- fruitst0
- Treatment
- hexanal treatmente0
- Outcome
- Respiration ratee0
- Direction
- delayede0
Not reportedComparator
Verbatim
e0“Respiration rate, ethylene production, and fruit softening were significantly (p < 0.05) delayed by hexanal treatment.”
t0“banana fruits (Musa acuminata)”
Claim · model-written summary
Hexanal significantly delayed ethylene production.
- Taxon
- bananat0
- Organ / stage
- fruitst0
- Treatment
- hexanal treatmente0
- Outcome
- ethylene productione0
- Direction
- delayede0
Not reportedComparator
Verbatim
e0“Respiration rate, ethylene production, and fruit softening were significantly (p < 0.05) delayed by hexanal treatment.”
t0“banana fruits (Musa acuminata)”
Claim · model-written summary
Hexanal significantly delayed fruit softening.
- Taxon
- bananat0
- Organ / stage
- fruitst0
- Treatment
- hexanal treatmente0
- Outcome
- fruit softeninge0
- Direction
- delayede0
Not reportedComparator
Verbatim
e0“Respiration rate, ethylene production, and fruit softening were significantly (p < 0.05) delayed by hexanal treatment.”
t0“banana fruits (Musa acuminata)”
Claim · model-written summary
Hexanal slowed increases in titratable acidity, Brix, and vitamin C.
- Taxon
- bananat0
- Organ / stage
- fruitst0
- Treatment
- hexanale0
- Outcome
- increases in total titratable acidity, 0Brix, and vitamin Ce0
- Direction
- slowere0
Not reportedComparator
Verbatim
e0“Progression of other ripening-related changes including increases in total titratable acidity, 0Brix, and vitamin C were slower in fruits treated with hexanal.”
t0“banana fruits (Musa acuminata)”
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