Effect of hot air on Deglet Noor palm quality parameters and on Ectomyelois ceratoniae

Ben-Amor, Rihab; Miguel-Gómez, María Dolores de; Martínez-Sánchez, Ascensión; Aguayo, Encarna

doi:10.1016/j.jspr.2016.03.001

Cited by 6 publications

(6 citation statements)

References 41 publications

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“…During these treatments, temperature never exceeded 50 °C; therefore, the quality parameters could not be reasonably affected; in previous research, dates treated with RF till the temperature of 60 °C to produce the mortality of the larvae, pupae, and adults of C. hemipterus did not show any negative changes in color [31]. Other heat-disinfestation experiments using hot air on Deglet-Nour dates [48] or RF applications on walnuts [49] have demonstrated that a temperature range between 50 and 60 °C does not affect the main quality parameters of dried fruit.…”

Section: Discussionmentioning

confidence: 99%

Emigration Effects Induced by Radio Frequency Treatment to Dates Infested by Carpophilus hemipterus

Rosi

Pegna

Nencioni

et al. 2019

Insects

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The dried fruit beetle (Carpophilus hemipterus) is considered a key pest of dates, infesting fruits both in the field and during storage. Control measures against the species rely on the use of chemicals or heat treatments based on sunlight, hot air or radio frequency (RF) applications. Previous investigations that have aimed to define control procedures for a total disinfestation using RF treatments with different exposure durations have shown the typical behavior of adults in some trials, which, under the influence of temperature increases, started to escape from infested fruits. We focused on the application of different RF voltage-time combinations to induce the emigration of C. hemipterus adults from dates in order to produce a complete disinfestation. The results showed that the application of 2500 V RF for 8–10 min to infested dates resulted in nearly 100% of adults escaping from fruits, thereby cleaning the commodity with low or no mortality inside and outside the dates. These achievements provide a new strategy for controlling key insect pests of dates that could be applied at an industrial scale, allowing for the quick disinfestation of fruits without affecting the fruit with harmful substances, such as residues from chemical treatments, and without unwanted side effects on date quality.

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Section: Discussionmentioning

confidence: 99%

Emigration Effects Induced by Radio Frequency Treatment to Dates Infested by Carpophilus hemipterus

Rosi

Pegna

Nencioni

et al. 2019

Insects

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“…These results highlight the varietal dependences on the carbohydrate level. The levels of sucrose, glucose, and fructose are reduced after a heat treatment prior to storage ( Ben-Amor et al, 2016a ).…”

Section: Nutrients Composition In Date Palmmentioning

confidence: 99%

“…In fact, high temperature, especially during the retail period, reduces fruit firmness. The optimal storage temperature is highly variable among cvs ( Ben-Amor et al, 2016a ). A general recommendation for Tamar dates is 0 °C which helps to keep quality about 6–12 months ( Kader and Awad, 2009 ).…”

Section: Nutrients Composition In Date Palmmentioning

confidence: 99%

“…It seems to exists a positive correlation between date quality and CO 2 levels around the fruits, and the use of MAP and partial vacuum improves its postharvest storability ( Jemni et al, 2016a ). A hot air treatment (55 °C for 30 min or 60 °C for 15 min) was effective in both controlling postharvest infestation by Ectomyelois ceratoniae and improve storability of Deglet nour cv at 2 °C ( Ben-Amor et al, 2016a ).…”

Section: Nutrients Composition In Date Palmmentioning

confidence: 99%

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Commercial techniques for preserving date palm (Phoenix dactylifera) fruit quality and safety: A review

Sarraf

Jemni²,

Kahramanoğlu

et al. 2021

Saudi Journal of Biological Sciences

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The popularity of date palm ( Phoenix dactylifera ) fruit is increasing, therefore the demand for high-quality date palm fruit with less or no chemical treatment is the topic of interest for date producers and consumers. The quality of date palm fruit is much dependent on its postharvest handling and processing. For preventing the degradation and maintenance of the high quality of dates during the storage an appropriate harvest and post-harvest processes are required. The process should control the biotic and abiotic factors like insects, fungus, temperature, as well as handling and processing of dates. Therefore, in this work, we reviewed the literature related to the protection of date fruits during their post-harvest life. The commercially viable advance and updated techniques that can be used to avoid storage losses and problems while keeping fruit quality (nutritional, color, flavor, and texture) and microbial safety under optimal conditions are discussed.

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“…Similar results were obtained by Flinn et al [25] reporting that treating flour pallets in commercial freezers for 5.5 days at −17.8°C was a feasible method for achieving 100% mortality of T. castaneum eggs. Other techniques such as hot water treatment (50°C for 10 min, 55°C for 5 min and 60°C for 3 min) [19] and hot air (at 55°C for 30 min, 60°C for 20 min and 60°C for 15 min) have also obtained 100% mortality E. ceratoniae larvae [26].…”

Section: Experiments 1: Effect Of Freezing Treatment On Ectomyelois Cementioning

confidence: 99%

Freezing Treatments for Ectomyelois ceratoniae Mortality and Maintenance of Deglet Noor Palm Date Quality

Ben-Amor

Miguel-Gómez

Habib

et al. 2019

Journal of Food Quality

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Background. Insect infestation caused by Ectomyelois ceratoniae or carob moth is one of the main postharvest problems that can lead to a decrease of the marketable quality of dates. The control of carob moth is a mandatory process for exported fruits, and the main chemical method used to prevent pest diseases of palm date is treatment with methyl bromide. However, its use is being restricted due to direct harmful effects on the environment and indirect effects on humans. Freezing treatments could be physical alternatives to methyl bromide and other chemicals. Three freezing treatments at −18°C (50 h, 77 h, and 125 h) were studied for E. ceratoniae mortality in Deglet Noor date fruits. Results. The results showed that freezing at −18°C led to 100% mortality of all the stages of E. ceratoniae found in naturally infested dates. Fruit quality was examined under a selected sanitizing freezing treatment (50 hours at −18°C). This freezing treatment induced an increase of monosaccharides and a reduction in antioxidant activity (40 to 45%, measured with FRAP and DPPH assays). However, other parameters such as color, amino acids, total phenolic content, and microbial and sensorial quality were not affected by that treatment. All samples remained above the limit of marketability as there was no chilling injury. Conclusion. This treatment can be recommended as a green alternative to chemical treatments to control carob moth while yielding optimum-quality Deglet Noor date fruits that could be exported to developed countries.

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Effect of hot air on Deglet Noor palm quality parameters and on Ectomyelois ceratoniae

Cited by 6 publications

References 41 publications

Emigration Effects Induced by Radio Frequency Treatment to Dates Infested by Carpophilus hemipterus

Emigration Effects Induced by Radio Frequency Treatment to Dates Infested by Carpophilus hemipterus

Commercial techniques for preserving date palm (Phoenix dactylifera) fruit quality and safety: A review

Freezing Treatments for Ectomyelois ceratoniae Mortality and Maintenance of Deglet Noor Palm Date Quality

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