Abstract
Guava fruits are considered sensitive to low temperature and susceptible to infection by decay causing fungi making its transport and storability difficult. Use of plant extracts which having fungicidal and insecticidal properties is one of the alternative methods against fungi causing guava decline disease caused by Phomopsis psidii, Lasiodiplodia theobroma and Epicoccum spp. Therefore, the present investigations were conducted during 2016 and 2017 seasons on guava fruits cv. Bassateen El Sabahia for maintaining quality and control disease development under cold and ambient conditions. The guava fruits were harvested at physiological maturity stage during the third week of January and treated with marigold flower extract, neem extract and mentha leaf extract at (10%) as dip treatment for 5 minutes. (Experiment 1).Treated fruits were packed in ventilated Corrugated Fibre Board (CFB) boxes and stored 28 days under cold storage at 6° C ± 2° and humidity 90-95% R.H. (Experiment 2). The fruits were stored for 6 days in ambient conditions at 15° C ± 2° with 65 – 70 % R.H. Under both of the storage conditions, all treatments exhibit potential to maintain the postharvest life of fruits by reducing linear growth and dry weight of the fungal spoilage as compared with untreated fruits. The lowest significant values of disease infection percentage were recorded by dipping fruits in neem leaf extract at 10% after 28 days of cold storage and 6 days at marketing in the two seasons. Among all extracts, neem in combination with (CFB) boxes effective in registered higher potential to retain the fruit quality for longer period under both conditions by reducing the weight loss, fruit spoilage and retaining the fruit firmness and quality attributes such as TSS, sugars, vitamin C and pectin. On the other hand, 10% Mentha leaf extract followed by marigold flower extract treatments proved to be highly effective in reducing spoilage under these treatments with respect to the untreated ones. Generally, the promising effects of these treatments showed that the winter season guava fruits can be stored up to 28th day under cold storage and up to 6th day under ambient condition without deteriorating the fruit quality.
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Claims 7
Claim · model-written summary
All extract treatments reduced fungal linear growth and dry weight relative to untreated fruits under both storage conditions.
- Taxon
- Guava
Psidium guajavat0 - Treatment
- all treatmentse0
- Outcome
- linear growth and dry weight of the fungal spoilagee0
- Direction
- reducinge0
- Comparator
- untreated fruitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under both of the storage conditions, all treatments exhibit potential to maintain the postharvest life of fruits by reducing linear growth and dry weight of the fungal spoilage as compared with untreated fruits.”
t0“Egyptian Guava”
e1“neem in combination with (CFB) boxes”
Claim · model-written summary
A 10% neem leaf extract dip gave the lowest significant disease infection percentages after cold storage and marketing.
- Taxon
- GuavaPsidium guajavat0
- Treatment
- dipping fruits in neem leaf extract at 10%e0
- Outcome
- disease infection percentagee0
- Direction
- loweste0
- Qualifier
- after 28 days of cold storage and 6 days at marketinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest significant values of disease infection percentage were recorded by dipping fruits in neem leaf extract at 10% after 28 days of cold storage and 6 days at marketing in the two seasons.”
t0“Egyptian Guava”
e1“neem in combination with (CFB) boxes”
Claim · model-written summary
Neem extract with CFB boxes reduced weight loss and fruit spoilage under both conditions.
- Taxon
- GuavaPsidium guajavat0
- Treatment
- neem in combination with (CFB) boxese0
- Outcome
- weight loss, fruit spoilagee0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“neem in combination with (CFB) boxes effective in registered higher potential to retain the fruit quality for longer period under both conditions by reducing the weight loss, fruit spoilage”
t0“Egyptian Guava”
e1“neem in combination with (CFB) boxes”
Claim · model-written summary
Neem extract with CFB boxes retained firmness and TSS, sugars, vitamin C and pectin under both conditions.
- Taxon
- GuavaPsidium guajavat0
- Treatment
- neem in combination with (CFB) boxese1
- Outcome
- fruit firmness and quality attributes such as TSS, sugars, vitamin C and pectine0
- Direction
- retaininge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“retaining the fruit firmness and quality attributes such as TSS, sugars, vitamin C and pectin.”
t0“Egyptian Guava”
e1“neem in combination with (CFB) boxes”
Claim · model-written summary
10% Mentha leaf extract reduced spoilage compared with untreated fruits.
- Taxon
- GuavaPsidium guajavat0
- Treatment
- 10% Mentha leaf extracte0
- Outcome
- spoilagee0
- Direction
- reducinge0
- Comparator
- untreated onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“10% Mentha leaf extract followed by marigold flower extract treatments proved to be highly effective in reducing spoilage under these treatments with respect to the untreated ones.”
t0“Egyptian Guava”
e1“neem in combination with (CFB) boxes”
Claim · model-written summary
Marigold flower extract reduced spoilage compared with untreated fruits.
- Taxon
- GuavaPsidium guajavat0
- Treatment
- marigold flower extract treatmentse0
- Outcome
- spoilagee0
- Direction
- reducinge0
- Comparator
- untreated onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“10% Mentha leaf extract followed by marigold flower extract treatments proved to be highly effective in reducing spoilage under these treatments with respect to the untreated ones.”
t0“Egyptian Guava”
e1“neem in combination with (CFB) boxes”
Claim · model-written summary
The authors concluded winter guava can be stored for 28 days in cold conditions or six days in ambient conditions without quality deterioration.
- Taxon
- guava fruitsPsidium guajavae0
- Outcome
- stored up to 28th day under cold storage and up to 6th day under ambient conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the winter season guava fruits can be stored up to 28th day under cold storage and up to 6th day under ambient condition without deteriorating the fruit quality.”
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