Research Articles (Horticulture)
Recent Submissions
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Classification of 'Granny Smith' apples with different levels of superficial scald severity based on targeted metabolites and discriminant analysis
(German Botanical Society, 2016)To study the metabolic changes in ‘Granny Smith’ apples with different severities of superficial scald, fruit were stored in normal refrigerated air (0°C, 95% RH) for 12 weeks followed by 7 d shelf-life under room conditions ...
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Stability of total phenolic concentration and antioxidant capacity of extracts from pomegranate co-products subjected to in vitro digestion
(BioMed Central, 2016-09)Background: Co-products obtained from pomegranate juice processing contain high levels of polyphenols with potential high added values. From value-addition viewpoint, the aim of this study was to evaluate the stability of ...
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Physiological responses of pears to exogenous ethylene and pre-harvest factors influencing post-harvest quality with reference to 'Forelle' and 'Packham's Triumph' pears
(Stellenbosch : Stellenbosch University, 2000-04)ENGLISH ABSTRACT: The major sites for fruit ripening and softening are found in the middle lamella where enzymatic and non-enzymatic mechanisms seem to degrade pectin polymers to a more soluble state and in the primary ...
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Use of evaporative cooling to improve ' Rosemarie' and ' Forelle' pear fruit blush colour and quality
(International Society for Horticultural Science -- ISHS, 2005-04)In Pyrus communis ‘Rosemarie’, a potentially lucrative blushed pear cultivar, poor fruit colour has been ascribed to pre-harvest red colour loss during periods of high temperature. High temperatures combined with high ...
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The effect of scoring during flower induction or the initiation phase on return bloom in Pyrus communis L
(International Society for Horticultural Science -- ISHS, 2005-04)The influence of scoring during the flower induction phase was investigated. Pear trees, Pyrus communis L. cv. Doyenne du Comice, Forelle and Rosemarie were used in the study, conducted in the Western Cape, South Africa. ...
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The effect of fruit maturity and storage duration on friction discolouration of Packham's Triumph and Doyenne du Comice pears
(International Society for Horticultural Science -- ISHS, 2005-04)Friction discolouration (FD) is causing the South African pear industry multi-million rand losses due to blemished fruit being rejected for the export market and being sold locally. The occurrence of FD was studied over ...
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The effect of different rates of prohexadione-calcium and girdling on shoot growth and fruit quality when applied to different pear cultivars
(International Society for Horticultural Science -- ISHS, 2005-04)Prohexadione-Calcium (P-Ca) is a promising new shoot growth retardant that is already registered on apples in North America (Apogee®) and in Europe (Regalis®). This gibberellin biosynthesis inhibitor with limited persistence ...
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Temperature variances in a 12 m integral reefer container carrying plums under a dual temperature shipping regime
(International Society for Horticultural Science -- ISHS, 2005-07)The South African plum industry is an important supplier of fresh fruit to the northern hemisphere from December to April. Extensive use is made of a dual- temperature shipping regime, which is a form of intermittent ...
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Status of the pear industry in Africa, with specific reference to South Africa
(Acta Horticulturae, 2005-04)In the context of global production, Africa as a continent is a very small producer of Pyrus communis pears, with roughly 3% of global hectares and production. South Africa produces 56% of Africa’s total crop, followed by ...
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Reproductive bud development of pears (Pyrus communis L.) with emphasis on the bourse shoot
(International Society for Horticultural Science -- ISHS, 2005-04)For consistent yields in pear fruit production, knowledge of the development of the reproductive bud is required. The aim of this study was to gain more insight into the development of the primordial bourse shoot. The ...
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Red colour development and loss in pears
(International Society for Horticultural Science -- ISHS, 2005-04)The endogenous and environmental regulation of red colour development in blushed and fully red pears is reviewed. Colour development in pears has an underlying developmental component. Generally, highest anthocyanin c ...
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Post-harvest control of the grain chinch bug Macchiademus diplopterus (Heteroptera: Lygaiedae) on pears in the Western Cape Province, South Africa
(Acta Horticulturae, 2005-04)The grain chinch bug (GCB) M. diplopterus is endemic to the Western Cape and as such is classified as a quarantine pest. The aim of this project was to evaluate post-harvest methods of control to ensure that packed fruit ...
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Postharvest calyx retention of citrus fruit
(Acta Horticulturae, 2005-06)Abscission is an active developmental process occurring at the abscission zone of the fruit peduncle. The target cells in the abscission zone, which are involved in the process of separation, are located in the separation ...
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Pear production in Chile : situation and trends
(Acta HorticulturaeInternational Society for Horticultural Science -- ISHS, 2005-04)Pear production is concentrated in the central zone of the country (32º-36°33’ S), under temperate climatic conditions. Pear is the fifth largest fruit crop in the Chilean export basket, representing 5% of the planted ...
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Nutrient distribution and requirement of 'Forelle'pear trees on two rootstocks
(International Society for Horticultural Science -- ISHS, 2005-04)Accurate water and fertilizer management are essential in modern high intensity orchard systems to enable the manipulation of both reproductive and vegetative development. Studies have been conducted to establish the ...
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Mealiness of Forelle pears - Quo vadis
(International Society for Horticultural Science -- ISHS, 2005-04)‘Forelle’ (Pyrus communis), a late season blushed pear cultivar grown in South Africa, requires a minimum of 12-weeks cold storage (-0.5 °C) to ripen evenly. Mealiness, a dry texture disorder, may develop at this time. ...
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Extension of the storage life of plums (Prunus salicina) using controlled atmosphere shipping
(International Society for Horticultural Science -- ISHS, 2005-06)South Africa is an important supplier of stone fruit to the northern hemisphere in the months of November to March. The voyage by sea to the main markets in the UK and Continental Europe necessitates production of cultivars ...
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Evolutions of the pear training model in South Africa
(International Society for Horticultural Science -- ISHS, 2005-04)The history of pear pruning and training under the hot and dry conditions in South Africa is discussed. Due to the poor soils and the need for irrigation the move towards high-density plantings occurred with the continued ...
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Effect of the rate and duration of forced air cooling on the quality of Imperial apricots and Pioneer and Songold plums
(Acta HorticulturaeInternational Society for Horticultural Science -- ISHS, 2005-06)Gel breakdown (GB) and overripeness (OR) remain the biggest internal Problems with Prunus armeniaca L. ‘Imperial’, which makes the biggest contribution to the total volume of apricots exported from South Africa per annum. ...
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Effect of pruning severity and branch quality on fruit set and fruit dry weight of Packham's Triumph pears (Pyrus communis L)
(International Society for Horticultural Science -- ISHS, 2005-04)The effect of dormant pruning and the quality of 2-year-old bearing units(BU) on fruit set and mean fruit dry weight of ‘Packham’s Triumph’ pears wasdetermined during the 2002/03 season. Fruit set on short BU (28 cm long) ...
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Early prediction of ripening and storage quality of pear fruit in South Africa
(International Society for Horticultural Science -- ISHS, 2005-04)Maturity index records for the principal pear cultivars in the two most important pear producing areas in South Africa were compiled to study the fluctuation in total soluble solids (TSS), fruit firmness and starch breakdown ...
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An architectural analysis of pear cultivars grown under South African conditions and the relevance to local maintenance pruning strategies.
(International Society for Horticultural Science -- ISHS, 2005)To quantify the growth habit of locally important pear varieties, initially, 2- year-old pear branches were classified into groups based on the length and position of lateral shoots. Four groups were formed that ranged ...
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Effects of packaging liners on cooling rate and quality attributes of table grape (cv. Regal Seedless)
(Wiley Blackwell, 2011-07)Table grapes are commonly packed in multi‐layered packages consisting of cardboard carton, plastic liners and carry bag/pouch to maintain product quality along the cold chain. Each liner is characterized by the number ...
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Resistance to airflow and cooling patterns through multi-scale packaging of table grapes
(Elsevier, 2012-03)Postharvest handling of table grape is commonly carried out using multi-scale packages comprised of the main container, inner liner film and pouches holding individual bunch of berries. Total pressure drop through different ...
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CFD model development and validation of a thermonebulisation fungicide fogging system for postharvest storage of fruit
(Elsevier, 2012-01)Postharvest treatments of fruits in storage rooms using a fogging system is a recent development that offer a promising means to reduce the use of fungicides in the orchards, where ecological and environmental risks are ...
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Investigating the performance of thermonebulisation fungicide fogging system for loaded fruit storage room using CFD model
(Elsevier, 2012-03)To study the operation of postharvest storage fungicide fogging systems, a CFD model was used. The modelling was based on an Eulerian–Lagrangian multiphase flow model. The effect of air circulation rate, circulation ...
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The use of CFD to characterize and design post-harvest storage facilities : past, present and future
(Elsevier, 2012)There has long been an interest on the use of mathematical models for optimization of post-harvest refrigeration systems operation and design. These mathematical models are applied to predict the biophysical phenomena ...
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Modeling the effect of time and temperature on respiration rate of pomegranate arils (cv. ‘‘Acco’’ and ‘‘Herskawitz’’)
(Wiley Blackwell, 2012-03)Abstract: Understanding the effect of time and temperature on the respiration rate (RR) of fresh-cut produce, towards the design of a suitable modified atmosphere packaging (MAP) system, requires an adequate mathematical ...
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Prediction of ‘Nules Clementine’ mandarin susceptibility to rind breakdown disorder using Vis/NIR spectroscopy
(Elsevier, 2012-12)The use of diffuse reflectance visible and near infrared (Vis/NIR) spectroscopy was explored as a nondestructive technique to predict ‘Nules Clementine’ mandarin fruit susceptibility to rind breakdown (RBD) disorder by ...
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Modelling the respiration rates of pomegranate fruit and arils
(Elsevier, 2012-02)The design of modified atmosphere packaging (MAP) for fresh and fresh-cut fruit requires adequate prediction of respiration rates (RRs). A study was conducted to determine the influences of storage temperature (5, 10 and ...
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