Abstract
Guava (Psidium juajava L.) is highly perishable, susceptible to mechanical damage and chilling injury and has a limited postharvest shelf life. This study explored the use of some postharvest treatments to extend the marketable shelf life of guava and to alleviate some pathogenic disorders. Mature yellowish-green guava fruits cv. were treated with hot water, hydrogen peroxide (H 2 O 2 ), calcium chloride grass oil fumigation and various combination between them and then stored at 81C with 90% relative humidity (RH) for 15 days. Fruits were transferred to room conditions at (222C and 55-60 %RH) till the end of the fruit marketable period. Fruits of all treatments showed lower fruit weight loss, decayed fruits and long marketable-life period in comparison to untreated (water only). Calcium chloride + lemon grass fumigation treatment gave fruits with high quality than other treated fruits. Ascorbic acid and total pectin values were the highest with calcium chloride + lemon grass fumigation treatment than in the control and other treated fruits, whereas acid % and SSC values were the lowest. All tested treatments greatly reduced rhizopus rot infection value after 10 days at 81C, rot infection percent was 100% in control fruit, whereas very little infection value was observed in treated fruit. Fruits treated with Calcium chloride + lemon grass fumigation were completely rhizopus rot free through 15 days storage at 81C. The sensory evaluation showed that this treatment could maintain appearance considered the most benefit fruit appearance ,physical, chemical fruit properties and free from rots at 81C for two weeks. This treatment considered the most benefit tested one.
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Claims 6
Claim · model-written summary
All treatments reduced fruit weight loss and decay and prolonged marketable life.
- Taxon
- guava
Psidium guajavat0 - Treatment
- all treatmentse0
- Outcome
- fruit weight loss, decayed fruits and long marketable-life periode0
- Direction
- lowere0
- Comparator
- untreated (water only)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruits of all treatments showed lower fruit weight loss, decayed fruits and long marketable-life period in comparison to untreated (water only).”
t0“guava”
Claim · model-written summary
Calcium chloride with lemon grass fumigation gave higher quality fruit than other treatments.
- Taxon
- guavaPsidium guajavat0
- Treatment
- Calcium chloride + lemon grass fumigation treatmente0
- Outcome
- high qualitye0
- Direction
- highe0
- Comparator
- other treated fruitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Calcium chloride + lemon grass fumigation treatment gave fruits with high quality than other treated fruits.”
t0“guava”
Claim · model-written summary
Ascorbic acid and total pectin were highest under calcium chloride and lemon grass fumigation.
- Taxon
- guavaPsidium guajavat0
- Treatment
- calcium chloride + lemon grass fumigation treatmente0
- Outcome
- Ascorbic acid and total pectin valuese0
- Direction
- higheste0
- Comparator
- the control and other treated fruitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ascorbic acid and total pectin values were the highest with calcium chloride + lemon grass fumigation treatment than in the control and other treated fruits”
t0“guava”
Claim · model-written summary
Acid percentage and SSC were lowest.
- Taxon
- guavaPsidium guajavat0
- Outcome
- acid % and SSC valuese0
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas acid % and SSC values were the lowest.”
t0“guava”
Claim · model-written summary
Treatments greatly reduced rhizopus rot infection after 10 days.
- Taxon
- guavaPsidium guajavat0
- Treatment
- All tested treatmentse0
- Outcome
- rhizopus rot infection valuee0
- Direction
- reducede0
- Qualifier
- after 10 days at 81Ce0
- Comparator
- control fruite0
_spores%2C_which_is_green_using_Light_Microscope%2C_Normal_image_without_any_coloring_or_processing_By_researcher_El_sayed_Al_gayar%2C_Faculty_of_Agriculture_Damietta_University.jpg?width=60){kind=small}
RhizopusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
_spores%2C_which_is_green_using_Light_Microscope%2C_Normal_image_without_any_coloring_or_processing_By_researcher_El_sayed_Al_gayar%2C_Faculty_of_Agriculture_Damietta_University.jpg?width=500)
Verbatim
e0“All tested treatments greatly reduced rhizopus rot infection value after 10 days at 81C, rot infection percent was 100% in control fruit, whereas very little infection value was observed in treated fruit.”
t0“guava”
Claim · model-written summary
Calcium chloride and lemon grass fumigation prevented rhizopus rot throughout 15 days of storage.
- Taxon
- guavaPsidium guajavat0
- Treatment
- Calcium chloride + lemon grass fumigatione0
- Outcome
- rhizopus rot freee0
- Qualifier
- through 15 days storage at 81Ce0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruits treated with Calcium chloride + lemon grass fumigation were completely rhizopus rot free through 15 days storage at 81C.”
t0“guava”
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See all 8 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.