Papaya Postharvest Physiology and Handling - Problems and Solutions

Chen, N. Jung; Manenoi, Ashariya; Paull, R.E.

doi:10.17660/actahortic.2007.740.35

Cited by 12 publications

(3 citation statements)

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“…Defoliation that occurred in winter (LA < 3 m 2 per plant), together with the low radiation level in that season (mean total daily PAR of 10.8 mol•m −2 ), was associated with TSS in papaya below 10 °Brix [42]. This study confirms that TSS is correlated with the NF/LA ratio and the FDD, suggesting that for maintaining good fruit quality (a minimum of 12 °Brix for the export market, similar to Hawaii's minimum of 11.5 °Brix, [43]), it should be kept at around 3-4 fruits per square meter of leaf surface for the variety studied in this experiment. In order to maintain this ratio during the whole year, it could be necessary to improve the greenhouse ambient conditions by using better structures, to adopt appropriate phytosanitary control techniques and to remove fruits, leaving a maximum of 3-4 fruit per leaf.…”

Section: Fruit Set and Total Soluble Solids Contentsupporting

confidence: 70%

Papaya (Carica papaya L.) Phenology under Different Agronomic Conditions in the Subtropics

et al. 2021

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European consumers have perceived that papaya fruits produced in subtropical areas (the Canary Islands and Mediterranean regions) do not have the desired quality at certain periods of the year. Thus, the development of technical and management strategies to optimize the yield and the quality of the fruit requires crop phenology studies. Meteorological variables (air temperature, relative humidity, and photosynthetically active radiation) and morphological characteristics (plant height, leaf emission rate, and leaf area) were recorded throughout the crop cycle. All the leaves and fruits were labeled in their anthesis week to calculate the source–sink ratio and to study the development and quality of the fruits. Data were collected in three commercial orchards representing two different types of systems, greenhouse and screenhouse, and two different regions: two plastic cover greenhouses located in the south (SP) and in the north (NP) of Tenerife, and one 40-mesh net screenhouse in the north of the island (NN). The selection of these cultivation systems and locations was made deliberately, so that the ambient variables within these crop protection structures were different throughout the cultivation cycle in order to better fit the model construction. The results suggested that in order to maintain good fruit quality, better environmental control is necessary inside the greenhouses and the screenhouse. Monitoring variables such as the growing degree days, the photosynthetically active radiation, and the number of fruits per plant leaf area ratio provided useful information for papaya production management in the Canary Islands and other subtropical areas, allowing farmers to predict harvest and fruit quality.

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Section: Fruit Set and Total Soluble Solids Contentsupporting

confidence: 70%

Papaya (Carica papaya L.) Phenology under Different Agronomic Conditions in the Subtropics

et al. 2021

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“…Over the last decade there has been 55% expansion in production and the global export market of a little over 2.67 lakh tons has grown in value by 76% (FAO, 2014) but, clearly, most papaya enters local and national supply chains. Appearance, flavour and nutritional value of papaya fruits can be reduced by factors such as harvesting at an inappropriate stage of maturity (Greenwel et al, 1997), extreme or fluctuating storage and transport temperatures (Paull et al, 1994;Pimentel and Walder, 2004) and mechanical damage resulting from poor handling practices (Chen et al, 2007;Proulx et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Effects of non-chemical treatments on postharvest diseases, shelf life and quality of papaya under two different maturity stages

Rashid

Borman

Hasna

et al. 2019

J Bangladesh Agric Univ

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Papaya is a climacteric fruit and highly perishable in nature, which trigger ethylene production and hence, its consumption period is very short after harvesting. The experiment was conducted at the Laboratories of the Departments of Horticulture and Agricultural Chemistry, Bangladesh Agricultural University; and Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh during the period from March to June 2018 to study the effect of non-chemical treatments on postharvest diseases, shelf life and quality of papaya under two different maturity stages. The two-factor experiment consisted of two maturity stages viz. (i) Maturity stage 1 (M1: mature green colour) and (ii) Maturity stage 2 (M2: 0-10% yellowing); and six non-chemical treatments viz. (i) Control (T0), (ii) Hot water treatment @ 50°C for 10 minutes (T1), (iii) Gamma irradiation @ 0.08 kGy for 10 minutes (T2), (iv) Chitosan coating @ 2% (T3), (iv) Hot water + gamma irradiation (T4), and (vi) Hot water + chitosan coating (T5). The experiment was conducted in a completely randomized design (CRD) with 3 replications. The combined effect of maturity stages and non-chemical treatments were significant on all the parameters studied viz. external colour, weight loss, pulp to peel ratio, pulp pH, total soluble solids (TSS), disease incidence and severity, and shelf life of papaya. The papaya fruits under combined treatment of hot water plus gamma irradiation showed better appearance and external colour than the others at both maturity stages. The maximum weight loss was recorded in M1T0 (17.96%) followed by M2T0 (16.58%) while the minimum was found in M1T5 (3.69) followed by M2T5 (3.91). The highest pulp to peel ratio was observed in M1T4 (3.82) followed by M1T5 (3.78), while the lowest (3.00) was recorded in control under both maturity stages. The highest pulp pH was observed in M2T4 (6.15) followed by M2T5 (6.07) while the lowest was found in M2T0 (4.83) followed by M1T0 (5.05). The maximum disease incidence and severity were recorded (100%) in M1T0 and M2T0, whereas the minimum disease incidence (81%) and severity (12.36%) was found in M1T4. The longest shelf life (16.50 days) was obtained in M1T4 followed by M2T4 (15.25 days) and the shortest shelf life (8.65 days) was observed in M2T0 followed by M1T0 (9.25 days). Thus, hot water plus gamma irradiation followed by hot water plus chitosan coating under both maturity stages could be used to significantly reduce postharvest fungal infection, extend shelf life and improve quality of papaya. J. Bangladesh Agril. Univ. 17(1): 14–25, March 2019

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“…As for the chemical characteristics, treatments with phosphite, mainly the Reforce ® + AS at both doses tested (T7 and T8) when applied 6 DBH, had significant effect on the variables studied, promoting physiological changes in fruits. However, at eight days after incubation (DAI) for these treatments, a delay in maturation of fruits in T7 and T8 was noticed, what possibly hindered the infection of P. palmivora on fruits due to the uninjured maintenance of the cell wall as well as the associated pectin derived substances (Table 3) (CHEN et al, 2007;MACEDO et. al., 2005;UENOJO;PASTORE, 2007).…”

Section: Effect Of Phosphites On Chemical Characteristics Of Papayamentioning

confidence: 99%

Reduction of papaya rot (Phytophthora palmivora) with phosphite and Acibenzolar-S-Methyl in preharvest and postharvest

Oliveira¹,

Blum²,

Duarte³

et al. 2018

Biosci. J.

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The papaya fruit rot (Phytophthora palmivora) is responsible for significant losses. To reduce diseases, especially in areas with climate and humidity favorable to pathogens, are adopted chemical methods, which sometimes increase the cost of production and cause severe environmental impacts. Alternatively, there are products, such as, phosphites of potassium and acibenzolar-S-methyl (ASM) that might be efficient on disease control and less aggressive to environment. Phosphites of K and ASM were evaluated in this study on the control effectiveness of papaya fruit rot at different dosages in preharvest and postharvest. The severity and percentage of disease control were evaluated for each treatment. For the pre-harvest treatments (applied six days before harvest), the phosphite of K [240 g L-1 K 2 O, 340 g L-1 P 2 O 5 and 50 g L-1 (Reforce ® + Salicylic Acid)] at 3 or 6 mL L-1 significantly reduced disease severity, and, reduced fruit ripening. On postharvest application, ASM reduced disease severity.

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Papaya Postharvest Physiology and Handling - Problems and Solutions

Cited by 12 publications

References 0 publications

Papaya (Carica papaya L.) Phenology under Different Agronomic Conditions in the Subtropics

Papaya (Carica papaya L.) Phenology under Different Agronomic Conditions in the Subtropics

Effects of non-chemical treatments on postharvest diseases, shelf life and quality of papaya under two different maturity stages

Reduction of papaya rot (Phytophthora palmivora) with phosphite and Acibenzolar-S-Methyl in preharvest and postharvest

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