scholarly journals Effect of Radiofrequency Heating on the Quality of ‘Fuyu’ Persimmon Fruit as a Treatment for Control of the Mexican Fruit Fly

HortScience ◽  
2007 ◽  
Vol 42 (1) ◽  
pp. 125-129 ◽  
Author(s):  
Maria E. Monzon ◽  
Bill Biasi ◽  
Elizabeth J. Mitcham ◽  
Shaojin Wang ◽  
Juming Tang ◽  
...  
Keyword(s):  
Skin Color ◽  
Titratable Acidity ◽  
Fruit Fly ◽  
Soluble Solids ◽  
Internal Quality ◽  
Anastrepha Ludens ◽  
Diospyros Kaki ◽  
Mexican Fruit Fly ◽  
Persimmon Fruit

The external and internal quality of ‘Fuyu’ persimmon fruit (Diospyros kaki L.) was evaluated after heating with radiofrequency (RF) energy to 48, 50, or 52 °C, holding at the target temperatures for durations ranging from 0.5 to 18 minutes, hydrocooling, and ripening at 20 °C for 12 days. These treatment conditions were identified for control of third instar Mexican fruit fly larvae (Anastrepha ludens). The treatments had no commercially significant effect on firmness, soluble solids content, titratable acidity, or weight loss of the fruit. RF-treated persimmon fruit attained a deeper orange–red skin color than control fruit. There was a greater incidence of slight to moderate flesh browning in fruit heated to 50 and 52 °C as compared with 48 °C. Calyx browning increased slightly in all RF-treated fruit and was the highest in the longer treatments at each temperature. Heating persimmon fruit with RF to 48 °C and then holding for 6 or 12 minutes showed the least damage, and the latter treatment was longer than should be required for a quarantine treatment against the third instar Mexican fruit fly. Holding persimmons for 6.6 minutes at 48 °C should provide control of the Mexican fruit fly and maintain fruit quality. Confirmation tests with infested fruit should be conducted.

scholarly journals Fruit quality of ‘Eva’ e ‘Princesa’ apples grown under nitrogen fertigation in semiarid climate

2015 ◽  
Vol 19 (10) ◽  
pp. 967-972 ◽  
Author(s):  
João M. de S. Miranda ◽  
Ítalo H. L. Cavalcante ◽  
Inez V. de M. Oliveira ◽  
Paulo R. C. Lopes ◽  
Joston S. de Assis
Keyword(s):  
Fruit Quality ◽  
Skin Color ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Economic Viability ◽  
Fruit Firmness ◽  
Fruit Characteristics ◽  
Apple Cultivars ◽  
Fruit Mass

ABSTRACTThe production of high quality fruits is a necessary factor for the adaptation and production of plant species with economic viability. Thus, an experiment was conducted from July 2012 to January 2013 to evaluate the fruit quality of the ‘Eva’ and ‘Princesa’ apple cultivars as a function of nitrogen fertilization in Petrolina, PE, Brazil. The experimental design consisted of randomized blocks, with treatments distributed in a factorial arrangement 2 x 4, corresponding to apple cultivars (Eva and Princesa) and nitrogen doses (40; 80; 120 and 160 kg of N ha-1), with four replications and three plants in each plot. The fruit characteristics, such as fruit mass, skin color (luminosity, chromaticity, and colour angle), size (width and length), pulp firmness, titratable acidity (TA), soluble solids (SS) and the SS/TA ratio, were recorded. Nitrogen doses do not affect fruit quality of studied apple cultivars. The fruit quality attributes are different between apple cultivars: fruit firmness, SS/TA ratio, fruit mass and fruit diameter are superior for Princesa cultivar, while the fruit length for Eva cultivar is superior.

scholarly journals Ripening and quality of 'Laetitia' plums following harvest and cold storage as affected by inhibition of ethylene action

2003 ◽  
Vol 38 (10) ◽  
pp. 1139-1148 ◽  
Author(s):  
Luiz Carlos Argenta ◽  
Juliana Golin Krammes ◽  
Clarice Aparecida Megguer ◽  
Cassandro Vidal Talamini Amarante ◽  
James Mattheis
Keyword(s):  
Cold Storage ◽  
Skin Color ◽  
Titratable Acidity ◽  
Storage Life ◽  
Soluble Solids ◽  
Storage Duration ◽  
Ethylene Action ◽  
Solids Content ◽  
And Storage

The inhibition of ethylene action by 1-methylcyclopropene (1-MCP) extends shelf and storage life of many climacteric fruits. However, 1-MCP appears to have limited effects on stone fruit depending on specie and cultivar. The effects of 1-MCP on ripening and quality of 'Laetitia' plums were determined during ripening at 23ºC following harvest and cold storage. Japanese plums (Prunus salicina, cv. Laetitia) were harvested at mature pre-climacteric stage, cooled to 2ºC within 36 hours of harvest and then treated with 0, 0.05, 0.10, 0.50 or 1.00 muL L-1 of 1-MCP at 1°C for 24 hours. Following treatment, fruits were either held at 23ºC for 16 days or stored at 1ºC for 50 days. Fruits were removed from cold storage at 10-day intervals and allowed to ripe at 23°C for five days. A delay of climacteric respiration and ethylene production by 1-MCP treatment during ripening following harvest and cold storage was associated to a slow rate of fruit softening. 1-MCP treatment also delayed the loss of titratable acidity and changes of flesh and skin color, whereas it had little or no effect on soluble solids content. 1-MCP effects were concentration- and storage duration-dependent and, generally, a saturation fruit response to 1-MCP occurred between 0.5 and 1.0 muL L-1. During ripening, 1-MCP treated fruits attained quality similar to that of controls. Results indicated that 1-MCP treatment may extend shelf life (23ºC) and storage life (1ºC) of 'Laetitia' plums by approximately six and 20 days, respectively.

scholarly journals Postharvest mechanical damage affects fruit quality of 'Montenegrina' and 'Rainha' tangerines

2009 ◽  
Vol 44 (12) ◽  
pp. 1636-1640 ◽  
Author(s):  
Cândida Raquel Scherrer Montero ◽  
Lígia Loss Schwarz ◽  
Liege Cunha dos Santos ◽  
Cristiane Salete Andreazza ◽  
Carolina Pereira Kechinski ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Mechanical Damage ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Internal Quality ◽  
Color Changes ◽  
Randomized Design ◽  
Total Titratable Acidity ◽  
Completely Randomized Design

The objective of this work was to evaluate the visual and chemical quality of tangerines after mechanical damage by impacts. The tangerine cultivars Montenegrina and Rainha were submitted to different degrees of impact and evaluated for decay and oleocellosis, loss of fresh weight, total soluble solids, total titratable acidity and ascorbic acid degradation, as well as for epicarp color changes. Experiments with three replicates and experimental units of six fruit for each cultivar were done in a completely randomized design. Impact produced qualitative internal and minor external changes on tangerines. The main modifications produced by impact on the fruit were losses of citric acid and soluble solids, which increased the solid:acid ratio, and losses of ascorbic acid. 'Montenegrina' tangerines are more susceptible to internal quality damage than 'Rainha'.

scholarly journals Quality of Valencia Oranges in Response to Fruit Fly Disinfestation Treatments

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 496A-496
Author(s):  
B.S. Patil ◽  
M.R. Williamson ◽  
P.M. Winkelman ◽  
J.R. Sievert ◽  
M.B. Butts ◽  
...  
Keyword(s):  
Weight Loss ◽  
Cold Treatment ◽  
Titratable Acidity ◽  
Fruit Fly ◽  
Soluble Solids ◽  
Air Treatment ◽  
Valencia Orange ◽  
Evaluation Panel ◽  
Forced Air

Valencia orange (C. sinensis L. Osbeck) fruit quality was evaluated following exposure to either a cold treatment or a high-temperature forced-air treatment (HTFA: fruit center end point, 47.2°C). These treatments are approved as disinfestation measures against selected fruit flies (APHIS, 1996). Fruits were stored at either 5°C or 1°C (cold treatment) for 14 days followed by 10 days at 11°C and 7 days at 20°C. Fruits were obtained six times during the commercial Valencia orange season (three grower lots/time). Valencia oranges exposed to HTFA had significantly lower appearance ratings, total soluble solids, titratable acidity, and also had significantly higher rind firmness and weight loss as compared to control or cold-treated fruits. Cold-treated fruits had significantly higher L and hue0 values. Fruits were also presented to an untrained sensory evaluation panel. Cold and HTFA treated fruits were rated significantly inferior in taste. Although statistically significant, these differences were slight. The potential for HTFA treatments for CA citrus, in light of these results, will be discussed.

scholarly journals ETHYLENE APPLICATION AFTER COLD STORAGE IMPROVES SKIN COLOR OF ‘VALENCIA’ ORANGES

2016 ◽  
Vol 38 (4) ◽  
Author(s):  
MARIA LUIZA LYE JOMORI ◽  
NATALIA DALLOCCA BERNO ◽  
RICARDO ALFREDO KLUGE
Keyword(s):  
Ascorbic Acid ◽  
Shelf Life ◽  
Cold Storage ◽  
Acid Content ◽  
Skin Color ◽  
Ascorbic Acid Content ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Internal Quality ◽  
Valencia Orange

ABSTRACT Degreening is a postharvest technique that consists of applying ethylene to oranges fresh fruits to improve skin color. In Brazil, this technique is still not widely applied due to a lack of specific research, resulting in poor fruit coloration, which limits the oranges’ exportation. The objective of this study was to investigate the de-greening effect of ethylene application after cold storage in ‘Valencia’ oranges. The ethylene treatments (0; 5 and 10 µL L-1 for 96 h at 22°C) were applied after storage for 30 days at 5°C. After ethylene application, the fruit were stored for three days at 22°C to simulate a shelf life. The skin color rate enhanced after ethylene treatment due to increased chlorophyllase activity. The content of carotenoids did not change, nor did the soluble solids, titratable acidity, ratio, percentage of juice and ascorbic acid content. The levels of acetaldehyde and ethanol in the juice were also assessed, and unpleasant odors or flavors did not occur despite a small increase in the acetaldehyde content. Therefore, the ethylene application after cold storage is efficient to improve the skin color of ‘Valencia’ orange without changing the internal quality.

Effect of Cold Storage and Removal Astringency on Quality of Persimmon Fruit (Diospyros kaki, L.) cv. Rojo Brillante

2004 ◽  
Vol 10 (3) ◽  
pp. 179-185 ◽  
Author(s):  
L. Arnal ◽  
M. A. Del RÌo
Keyword(s):  
Cold Storage ◽  
Storage Temperature ◽  
Chilling Injury ◽  
Storage Period ◽  
Soluble Solids ◽  
Diospyros Kaki ◽  
Persimmon Fruit ◽  
Acetaldehyde Production ◽  
Colour Appearance

Cold storage and removal of astringency effects on quality of persimmon fruit cv. Rojo brillante were determined. Persimmon fruit were stored at 1, 8, 11 and 15 ºC (85–90% RH) and after 6, 13, 20, 27 and 34 days of storage at these temperatures, astringency was removed. Fruit quality was assessed after the removal of the astringency and after a simulated retail storage period of 6 days at 20 ºC. Storage temperature affected fruit firmness, colour, appearance, acetaldehyde and ethanol production but not total soluble solids or flavour. Fruit stored at 15 ºC followed by 6 days at 20 ºC maintained the best commercial firmness and the lowest ethanol and acetaldehyde production. Chilling injury was observed after storage at 20 ºC on those fruits previously stored at 1 or 8 ºC.

scholarly journals QUALITY OF ACEROLA (Malpighia emarginata) TREATED WITH GIBBERELIC ACID AND STORED UNDER REFRIGERATION

2017 ◽  
Vol 39 (4) ◽  
Author(s):  
KELLINA OLIVEIRA DE SOUZA ◽  
CARLOS FARLEY HERBSTER MOURA ◽  
MÔNICA MARIA DE ALMEIDA LOPES ◽  
MARCELA CRISTINA RABELO ◽  
MARIA RAQUEL ALCÂNTARA DE MIRANDA
Keyword(s):  
Vitamin C ◽  
Skin Color ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Red Color ◽  
Malpighia Emarginata ◽  
Gibberelic Acid ◽  
Control Water

ABSTRACT The goal of this study was study the postharvest quality of acerola clone BRS 236 (Malpighia emarginata D.C.) which was harvested at physiological maturity and submitted to four treatments under immersion during 5 minutes at 25 °C, which are: control (water), 60 mg L-1; 120 mg L-1 and 180 mg L-1. After treatment the fruits were packed in polystyrene trays and placed with polyethylene film and then stored at 10 ± 2 °C and 85 ± 5% RH for 12 days. Were analyzed in three days intervals (0, 3, 6, 9 and 12 days): skin color, firmness, pH, titratable acidity, soluble solids, SS/TA ratio, vitamin C and yellow flavonoids. Vitamin C, anthocyanins and yellow flavonoids were not influenced by treatments with GA3 at the end of 12-day of cold storage at 10 ºC. The exogenous application of 120 mg L-1 of GA3 resulted in retention of red color and content of anthocyanins of acerola fruits BRS 236 clone 12-day storage at 10 °C.

scholarly journals Volatile Compounds and Physicochemical Quality of Four Jabuticabas (Plinia sp.)

Molecules ◽  
2020 ◽  
Vol 25 (19) ◽  
pp. 4543
Author(s):  
Thais Pádua Freitas ◽  
Isabela Barroso Taver ◽  
Poliana Cristina Spricigo ◽  
Lucas Bueno do Amaral ◽  
Eduardo Purgatto ◽  
...  
Keyword(s):  
Volatile Compounds ◽  
Skin Color ◽  
Solid Phase ◽  
Titratable Acidity ◽  
Quality Parameters ◽  
Nutritional Composition ◽  
Soluble Solids ◽  
Gas Chromatography Mass Spectrometry ◽  
Analysis Techniques

The jabuticaba is a native Brazilian fruit that has aroused worldwide interest in terms of its nutritional composition and biological activity. However, research on the profile of volatile compounds (VOCs) emitted by these fruits is rare. This study presents the first identification of VOCs from four jabuticaba species. The aim of the study was to characterize the aromatic profile of the following species: ‘Sabará’ (Plinia jaboticaba), ‘Escarlate’ (Plinia phitrantha × Plinia cauliflora), ‘Otto Andersen’ (Plinia cauliflora), and ‘Esalq’ (Plinia phitrantha). The analysis was performed by headspace solid-phase microextraction combined with gas chromatography/mass spectrometry (SPME-GC-MS). Multivariate analysis techniques applying the partial least squares-discriminant analysis (PLS-DA) and heatmap were used to compare the results. Fruit quality parameters were determined in terms of fresh mass (g), skin color, soluble solids, and titratable acidity. A total of 117 VOCs was identified including terpenoids, esters, alcohols, aldehydes, alkanes, ketones, and carboxylic acids, with 36 VOCs common to all four species. Terpenes were the majority for all jabuticabas with smaller contributions from other volatile classes, especially β-cubebene, β-elemene, and D-limonene for the ‘Otto Andersen’ jabuticaba.

scholarly journals Postharvest quality of ‘Galaxy’ apples submitted to the treatment with 1-MCP and different cooling times between harvest and cold storage

2017 ◽  
Vol 47 (8) ◽  
Author(s):  
Crizane Hackbarth ◽  
Cristiano André Steffens ◽  
Cassandro Vidal Talamini do Amarante ◽  
Mayara Cristiana Stanger ◽  
Auri Brackmann
Keyword(s):  
Relative Humidity ◽  
Fruit Quality ◽  
Cold Storage ◽  
Skin Color ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Flesh Firmness ◽  
And Storage

ABSTRACT: In this research it was evaluated if the use of 1-methylcyclopropene (1-MCP), associated to different cooling times between the harvest and storage, replaces the pre-cooling in ‘Galaxy’ apples. Treatments were arranged in a factorial scheme, combining the following factors: application of 1-MCP (with or without) and different times between harvest and cooling (24 hours, 96 hours, 144 hours and 192 hours in 2013; and 24 hours, 48 hours, 144 hours and 240 hours in 2014). After four months of cold storage (1.0±0.2°C/92±5% RH - Relative Humidity) were evaluated: flesh firmness, texture, titratable acidity (TA), soluble solids (SS) and skin color. Apples treated with 1-MCP showed greater flesh firmness, texture and SS, in both years, and more TA and lower incidence of mealy flesh compared to apples not treated with 1-MCP in 2013. The 1-MCP was effective in maintaining the fruit quality, even with the cooling delay of up to 240 hours. Cooling delay of 192 hours and 240 hours in ‘Galaxy’ apples not treated with 1-MCP should be avoided because it reduces the quality of fruits.

scholarly journals Evaluating the quality of the Mexican fruit-fly, Anastrepha ludens, as host for the parasitoid Melittobia digitata

Entomologia ◽  
2013 ◽  
pp. e5 ◽  
Author(s):  
J.M. González ◽  
M. Aluja ◽  
A. Cusumano ◽  
S. Colazza ◽  
S.B. Vinson
Keyword(s):  
Central America ◽  
Natural Enemy ◽  
Laboratory Experiments ◽  
Fruit Fly ◽  
Anastrepha Ludens ◽  
Mexican Fruit Fly ◽  
Natural Hosts ◽  
Important Pest ◽  
Neobellieria Bullata

We investigated the presence of Melittobia digitata (Hymenoptera: Eulophidae) and its associations with its natural hosts in Veracruz, Mexico. The parasitoid was confirmed to be present and found to attack prepupae of Trypoxylon and Sceliphron (Hymenoptera: Crabronidae and Sphecidae, respectively) mud daubers as well as pupae of the Mexican fruit fly Anastrepha ludens (Diptera: Tephritidae). Since A. ludens is a very important pest of citrus and mango in Mexico and Central America, we evaluated, in laboratory experiments, the quality of A. ludens as host of M. digitata comparing the development of the parasitoid in another unrelated fly species (Sarcophaga [Neobellieria] bullata) (Diptera: Sarcophagidae) and in mud dauber wasps (Trypoxylon sp. and Sceliphron sp.). The Mexican fruit fly appears to be a good-quality host for M. digitata, and the results are discussed in the context of their possible interest as a natural enemy of A. ludens.

Sign in / Sign up

Export Citation Format

Share Document