Horticultural Sciences
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Publications 2013

AMBAW A, VERBOVEN P, DEFRAEYE T, TIJSKENS E, SCHENK A, OPARA LU, NICOLAI BM. Effect of box materials on the distribution of 1-MCP gas during cold storage: A CFD study. Journal of Food Engineering 2013; 119 : 150-158.

AMBAW A, VERBOVEN P, DEFRAEYE T, TIJSKENS E, SCHENK A, OPARA LU, NICOLAI BM. Porous medium modelling and parameter sensitivity analysis of 1-MCP distribution in boxes with apple fruit. Journal of Food Engineering 2013; 119 : 13-21.

CALEB OJ, MAHAJAN PV, AL-SAID F, OPARA LU. Modified atmosphere packaging technology of fresh and fresh-cut produce and the microbial consequences – A review. Food and Bioprocess Technology 2013; 6 : 303-329.

CALEB OJ, MAHAJAN PV, AL-SAID F, OPARA LU. Transpiration rate and quality of pomegranate arils as affected by storage conditions. CyTa-Journal of Food 2013; 11(3) : 199-207.

CALEB OJ, MAHAJAN PV, MANLEY M, OPARA LU. Evaluation of parameters affecting modified atmosphere packaging engineering design for pomegranate arils. International Journal of Food Science and Technology 2013; 48 : 2315-2323.

CALEB OJ, OPARA LU, MAHAJAN PV, MANLEY M, MOKWENA L, TREDOUX AGJ. Effect of modified atmosphere packaging and storage temperature on volatile composition and postharvest life of minimally-processed pomegranate arils (cvs. 'Acco' and 'Herskawitz'). Postharvest Biology and Technology 2013; 79 : 54-61.

CHEN L, HENG R, DELELE MA, CAI J, DU D, OPARA LU. Investigation of dry powder aerosolization mechanisms in different channel designs. International Journal of Pharmaceutics 2013; 457 : 143-149.

CHEN L, OPARA LU. Approaches to analysis and modelling texture in fresh and processed foods – A review. Journal of Food Engineering 2013; 119 : 497-507.

CHEN L, OPARA LU. Texture measurement approaches in fresh and processed foods – A Review. Food Research International 2013; 51 : 823-835.

CRONJE PJR, BARRY GH, HUYSAMER M. Canopy position affects pigment expression and accumulation of flavedo carbohydrates of 'Nules Clementine' mandarin fruit, thereby affecting rind condition. Journal of the American Society for Horticultural Science 2013; 138(3) : 217-224.

​DEFRAEYE T, LAMBRECHT R, TSIGE AA, DELELE MA, OPARA LU, CRONJE PJR, VERBOVEN P, NICOLAI BM. Forced-convective cooling of citrus fruit: Package design. Journal of Food Engineering 2013; 118 : 8-18.

DELELE MA, NGCOBO MEK, GETAHUN ST, CHEN L, MELLMANN J, OPARA LU. Studying airflow and heat transfer characteristics of a horticultural produce packaging system using a 3-D CFD model. Part I: Model development and validation. Postharvest Biology and Technology 2013; 86 : 536-545.

DELELE MA, NGCOBO MEK, GETAHUN ST, CHEN L, MELLMANN J, OPARA LU. Studying airflow and heat transfer characteristics of a horticultural produce packaging system using a 3-D CFD model. Part II: Effect of package design. Postharvest Biology and Technology 2013; 86 : 546-555.

FAWOLE OA, MAKUNGA NP, OPARA UL. Antibacterial, antioxidant and tyrosinase-inhibition activities of pomegranate fruit peel methanolic extract. BMC Complementary and Alternative Medicine 2012; 12 : Art. 200.

FAWOLE OA, OPARA LU. Changes in physical properties, chemical and elemental composition and antioxidant capacity of pomegranate (cv. Ruby) fruit as five maturity stages. Scientia Horticulturae 2013; 150 : 37-46.

​FAWOLE OA, OPARA LU. Developmental changes in maturity indices of pomegranate fruit: A descriptive review. Scientia Horticulturae 2013; 159 : 152-161.

FAWOLE OA, OPARA LU. Effects of maturity status on biochemical content, polyphenol composition and antioxidant capacity of pomegranate fruit arils (cv. 'Bhagwa'). South African Journal of Botany 2013; 85 : 23-31.

FAWOLE OA, OPARA LU. Effects of storage temperature and duration on physiological responses of pomegranate fruit. Industrial Crops and Products 2013; 47 : 300-309.

FAWOLE OA, OPARA LU. Fruit growth dynamics, respiration rate and physic-textural properties during pomegranate development and ripening. Scientia Horticulturae 2013; 157 : 90-98.

FAWOLE OA, OPARA LU. Harvest discrimination of pomegranate fruit: Postharvest quality changes and relationships between instrumental and sensory attributes during shelf life. Journal of Food Science 2013; 78(8) : S1264-S1272.

FAWOLE OA, OPARA LU. Seasonal variation in chemical composition, aroma volatiles and antioxidant capacity of pomegranate during fruit development. African Journal of Biotechnology 2013; 12(25) : 4006-4019.

FREIBOTH HW, GOEDHALS-GERBER LL, VAN DYK FE, DODD MC. Investigating temperature breaks in the summer fruit export cold chain: A case study. Journal of Transport and Supply Chain Management 2013; 7(1) : Art.#99.

JOOSTE MM. Have your plum...and eat it!. New Voices in Science 2013; 1 : 28.

JOOSTE MM. How to stop plums from going brown. Farmers Weekly 2013; 27 September : 28.

JOOSTE MM. Verkoel pruime eerder stapsgewys. Landbouweekblad 2013; 20 September : 60-64.

JOOSTE MM. Wees slim wanneer jy pruime stoor. South African Fruit Journal 2013; 12(6) : 53.

HO QT, CARMELIET J, DATTA AK, DEFRAEYE T, DELELE MA, HERREMANS E, OPARA LU, RAMON H, TIJSKENS E, VAN DER SMAN R, VAN LIEDEKERKE P, VERBOVEN P, NICOLAI BM. Multiscale modeling in food engineering. Journal of Food Engineering 2013; 114 : 279-291.

LOUW ED, THERON KI. The effects of ripening and cold storage on the volatile profiles of three Japanese plum cultivars (Prunus salicina Lindl.) and one interspecific plum-apricot cultivar. Journal of Agricultural Science 2012; 4(11) : 257-275.

LOUW ED, THERON KI. Using near-infra red (NIR) spectroscopy to predict quality in plums. South African Fruit Journal 2013; 12(4) : 81-84.

MAGWAZA LS, FORD HD, CRONJE PJR, OPARA LU, LANDAHL S, TATAM RP, TERRY LA. Application of optical coherence tomography to non-destructively characterise rind breakdown disorder of 'Nules Clementine' mandarins. Postharvest Biology and Technology 2013; 84 : 16-21.

MAGWAZA LS, OPARA LU, CRONJE PJR, LANDAHL S, TERRY LA. Canopy position affects rind biochemical profile of 'Nules Clementine' mandarin fruit during postharvest storage. Postharvest Biology and Technology 2013; 86 : 300-308.

MAGWAZA LS, OPARA LU, TERRY LA, LANDAHL S, CRONJE PJR, NIEUWOUDT HH, HANSSENS A, SAEYS W, NICOLAI BM. Evaluation of Fourier transform-NIR spectroscopy for integrated external and internal quality assessment of Valencia oranges. Journal of Food Composition and Analysis 2013; 31 : 144-154.

MAKEREDZA B, SCHMEISSER M, LÖTZE E, STEYN WJ. Water stress increases sunburn in 'Cripps' Pink' apple. Hortscience 2013; 48(4) : 444-447.

MDITSHWA A, FAWOLE OA, AL-SAID F, AL-YAHYAI R, OPARA LU. Phytochemical content, antioxidant capacity and physicochemical properties of pomegranate grown in different microclimates in South Africa. South African Journal of Plant and Soil 2013; 30(2) : 81-90.

NGCOBO MEK, DELELE MA, CHEN L, OPARA LU. Investigating the potential of a humidification system to control moisture loss and quality of 'Crimson Seedless' table grapes during cold storage. Postharvest Biology and Technology 2013; 86 : 201-211.

NGCOBO MEK, DELELE MA, OPARA LU, MEYER CJ. Performance of multi-packaging for table grapes based on airflow, cooling rates and fruit quality. Journal of Food Engineering 2013; 116 : 613-621.

NGCOBO MEK, PATHARE PB, DELELE MA, CHEN L, OPARA LU. Moisture diffusivity of table grape stems during low temperature storage conditions. Biosystems Engineering 2013; 115 : 346-353.

NJOMBOLWANA N, ERASMUS A, VAN ZYL JG, DU PLOOY W, CRONJE PJR, FOURIE PH. Effects of citrus wax coating and brush type on imazalil residue loading, green mould control and fruit quality retention of sweet oranges. Postharvest Biology and Technology 2013; 86 : 362-371.

OPARA LU, AL-YAHYAI R, AL-WAILI N, AL-SAID F, AL-ANI M, MANICKAVASAGAN A, AL-MAHDOURI A. Postharvest responses of 'Malindi' Cavendish banana to various storage conditions. International Journal of Fruit Science 2013; 13 : 373-388.

OPARA LU, MDITSHWA A. A review on the role of packaging in securing food system: Adding value to food products and reducing losses and waste. African Journal of Agricultural Research 2013; 8(22) : 2621-2630.

OPARA LU. Editorial: Postharvest – proposal to standardise the terminology. International Journal of Postharvest Technology and Innovation 2013; 3(2) : 105-108.

OPARA LU. Perspective: Investing in research and promoting trade are critical for Africa's agricultural transformation. International Journal of Postharvest Technology and Innovation 2013; 3(1) : 97-103.

OPARA LU. Professor Emeritus Adel A Kader (1941 – 2012): A golden era in postharvest education, research and practice. International Journal of Postharvest Technology and Innovation 2013; 3(1) : 1-4.

OPARA LU. Successful mechanisation of smallholder agriculture – opportunities for cooperation and partnership between Africa and Japan. Agricultural Mechanization in Asia, Africa and Latin America 2013; 44(4) : 27-30.

OPARA LU. The role of universities in transforming African agriculture for economic development – producing knowledge farmers and entrepreneurial leaders. International Journal of Postharvest Technology and Innovation 2013; 3(2) : 207-215.

PATHARE PB, OPARA LU, AL-SAID F. Colour measurement and analysis in fresh and processed food: A review. Food and Bioprocess Technology 2013; 6 : 36-60.

SCHMEISSER M, JACOBS G, STEYN WJ. Elucidation of seasonal pigmentation patterns in the involucral leaves of Leucadendron 'Safari Sunset'. South African Journal of Plant and Soil 2013; 30(3) : 139-146.

SCHMEISSER M, JACOBS G, STEYN WJ. The function of regreening in yellow female Leucadendron (Proteaceae). South African Journal of Plant and Soil 2013; 30(3) : 147-155.

​TURKETTI SS, LÖTZE E. Visual identification of damage associated with lenticels in apples after cold storage. South African Fruit Journal 2013; 12(2) : 63.


Publications 2012

​BERGMAN H, CROUCH EM, CROUCH IJ, JOOSTE MM, MAJONI TJ. Update on the possible causes and management strategies of flesh browning disorders in 'Cripps' Pink' apples. South African Fruit Journal 2012; 11(1) : 56-59.

CALEB OJ, MAHAJAN PV, OPARA UL, WITTHUHN RC. Modelling the respiration rates of pomegranate fruit and arils. Postharvest Biology and Technology 2012; 64 : 49-54.

CALEB OJ, OPARA UL, WITTHUHN RC. Modified atmosphere packaging of pomegranate fruit and arils: A Review. Food and Bioprocess Technology 2012; 5 : 15-30.

DELELE MA, VOSTERMANS B, CREEMERS P, TSIGE AA, TIJSKENS E, SCHENK A, OPARA UL, NICOLAI BM, VERBOVEN P. CFD model development and validation of a thermonebulisation fungicide fogging system for postharvest storage of fruit. Journal of Food Engineering 2012; 108: 59-68.

DELELE MA, VOSTERMANS B, CREEMERS P, TSIGE AA, TIJSKENS E, SCHENK A, OPARA UL, NICOLAI BM, VERBOVEN P. Investigating the performance of thermonebulisation fungicide fogging system for loaded fruit storage room using CFD model. Journal of Food Engineering 2012;109 : 87-97.

DUVENHAGE AJ, JOOSTE MM, JOHNSON SA. Irradiation as a postharvest quarantine treatment for a new pluot cultivar. Scientia Horticulturae 2012; 147 : 64-70.

FAWOLE OA, MAKUNGA NP, OPARA UL. Antibacterial, antioxidant and tyrosinase-inhibition activities of pomegranate fruit peel methanolic extract. BMC Complementary and Alternative Medicine 2012; 12 : 200-211.

FAWOLE OA, OPARA UL, THERON KI. Chemical and phytochemical properties and antioxidant activities of three pomegranate cultivars grown in South Africa. Food and Bioprocess Technology 2012; 5 : 2934-2940.

FAWOLE OA, OPARA UL. Composition of trace and major minerals in different parts of pomegranate (Punica granatum) fruit cutivars. British Food Journal 2012; 114(11) : 1518-1532.

GERBER HJ, STEYN WJ, THERON KI. Determination of the optimal shoot length and pruning strategies in 'Bourjasotte Noire' fig. Acta Horticulturae 2012; 940 : 89-95.

HOFFMAN EW, JACOBS G. Developing inflorescences of Protea 'Carnival' reduce the responsiveness of non-flowering shoots to Benzyladenine induction of flowers 'out of season'. Acta Horticulturae 2012; 937 : 777-782.

LÖTZE E. A comparison between two, locally produced seaweed biostimulants regarding nutrient and alginic acid composition and biological rooting response. South African Fruit Journal 2012; 11(4) : 70-72.

LÖTZE E, BERGH O. Are chilling unit calculations still relevant for the SA fruit industry?. South African Fruit Journal 2012; 11(4) : 65-67.

LÖTZE E, BERGH O. Evaluating the Streif index against commercial subjective predictions to determine the harvest date of apples in South Africa. South African Journal of Plant and Soil 2012; 29(2) : 53-56.

LOUW ED, THERON KI. Volatile dynamics during maturation, ripening and cold storage of three Japanese plum cultivars (Prunus salicina Lindl.). Postharvest Biology and Technology 2012; 40 : 13-24.

MAGUYLO K, COOK NC, THERON KI. Environment and position of first bud to break on apple shoots affects lateral outgrowth. Trees-Structure and Function 2012; 26 : 663-675.

MAGWAZA LS, OPARA UL, NIEUWOUDT HH, CRONJE PJR, SAEYS W, NICOLAI BM. NIR spectroscopy applications for internal and external quality analysis of citrus fruit - A review. Food and Bioprocess Technology 2012; 5 : 425-444.

MAGWAZA LS, OPARA UL, TERRY LA, LANDAHL S, CRONJE PJR, NIEUWOUDT HH, MOUNEM MOUAZEN A, SAEYS W, NICOLAI BM. Prediction of 'Nules Clementine' mandarin susceptibility to rind breakdown disorder using Vis/NIR spectroscopy. Postharvest Biology and Technology 2012; 74 : 1-10.

NGCOBO MEK, DELELE MA, OPARA UL, ZIETSMAN CJ, MEYER CJ. Resistance to airflow and cooling patterns through multi-scale packaging of table grapes. International Journal of Refrigeration-Revue Internationale Du Froid 2012; 35 : 445-452.

NGCOBO MEK, DELELE MA, PATHARE PB, CHEN L, OPARA UL, MEYER CJ. Moisture loss characteristics of fresh table grapes packed in different film liners during cold storage. Biosystems Engineering 2012; 113(4) : 363-370.

NGCOBO MEK, OPARA UL, THIART GD. Effects of packaging liners on cooling rate and quality attributes of table grape (cv. Regal Seedless). Packaging Technology and Science 2012; 25 : 73-84.

PATHARE PB, OPARA UL, VIGNEAULT C, DELELE MA, AL-SAID FA. Design of packaging vents for cooling fresh horticultural produce. Food and Bioprocess Technology 2012; 5 : 2031-2045.

STEYN WJ. The physiology and functions of fruit pigments: An ecological and horticultural perspective. Horticultural Reviews 2012; 39 : 239-271.

TURKETTI SS, CURRY E, LÖTZE E. Role of lenticel morphology, frequency and density on incidence of lenticel breakdown in 'Gala' apples. Scientia Horticulturae 2012; 138 : 90-95.

WILSDORF RE, THERON KI, LÖTZE E. Evaluating the effectiveness of different strategies for calcium application on the accumulation of calcium in apple (Malus X domestica Borkh. 'Braeburn') fruit. Journal of Horticultural Science & Biotechnology 2012; 87(6) : 565-570.

Publications 2011

​ALLDERMAN LA, STEYN WJ, COOK NC. Growth regulator manipulation of apple bud dormancy progressions under conditions of inadequate winter chilling. South African Journal of Plant and Soil 2011; 28(2) : 103-109.

CRONJE PJR, BARRY GH, HUYSAMER M. Fruiting position during development of 'Nules Clementine' mandarin affects the concentration of K, Mg and Ca in the flavedo. Scientia Horticulturae 2011; 130(4) : 829-837.

CRONJE PJR, BARRY GH, HUYSAMER M. Postharvest rind breakdown of 'Nules Clementine' mandarin is influenced by ethylene application, storage temperature and storage duration. Postharvest Biology and Technology 2011; 60(3) : 192-201.

DZIKITI S, VERREYNNE JS, STUCKENS J, STREVER AE, VERSTRAETEN WW, SWENNEN RL, THERON KI, COPPIN P. Seasonal variation in canopy reflectance and its application to determine the water status and water use by citrus trees in the Western Cape, South Africa. Agricultural and Forest Meteorology 2011; 151(8) : 1035-1044.

KANGUEEHI GN, STASSEN PJC, THERON KI, WOOLDRIDGE J. Macro and micro element requirements of young and bearing apple trees under drip fertigation. South African Journal of Plant and Soil 2011; 28(2) : 136-141.

LÖTZE E, SADIE A, THERON KI. Development of a Pre-Harvest Prediction Model for Ripening of 'Forelle' Pears (Pyrus communis L.). Acta Horticulturae 2011; 909 : 693-698.

MIDGLEY SJE, LÖTZE E. Climate Change in the Western Cape of South Africa: Trends, Projections and Implications for Chill Unit Accumulation. Acta Horticulturae 2011; 903 : 1127-1134.

STEYN WJ, MANNING N, MULLER M, HUMAN JP. Physical, Sensory and Consumer Analysis of Eating Quality and Appearance of Pear Genotypes among South African Consumers. Acta Horticulturae 2011; 909 : 579-586.

STUCKENS J, SWENNEN RL, COPPIN P, DZIKITI S, VERREYNNE JS, VERSTRAETEN WW. Extracting Physiological Info from a Hyperspectral Time Series of a Citrus Orchard. Acta Horticulturae 2011; 919 : 11-18.

THERON KI. Size Matters: Factors Influencing Fruit Size in Pear. Acta Horticulturae 2011; 909 : 545-555.

THERON KI. Sud Africa, la coltura si rinnova guardando all' esportazione. Rivista di Frutticoltura 2011; LXXIII(9) : 38-42.

THERON KI. The Pear Industry in South Africa. Chronica Horticulturae 2011; 51(4) : 19-22.

THERON KI, CHABIKWA TG, LÖTZE GFA. Evaluation of 6-Benzyladenine (BA) and Naphthylacetamide (NAD) as Post-Bloom Thinning Compounds for 'Early Bon Chrétien' Pear. Acta Horticulturae 2011; 909 : 387-393.

THERON KI, GERBER HJ, STEYN WJ. Effect of hydrogen cyanamide, mineral oil and thidiazuron in combination with tip pruning on bud break, shoot growth and yield in 'Bourjasotte Noire', 'Col de Damme Noire' and 'Noire de Caromb' figs. Scientia Horticulturae 2011; 128(3) : 239-248.

Publications 2010

AL-SAID FA, OPARA LU, AL-YAHYAI R. Physico-chemical and textural quality attributes of pomegranate cultivars (Punica granatum L.) grown in the Sultanate of Oman. Journal of Food Engineering 2009; 90 : 129-134.

BARRY GH, LE ROUX S. Preharvest Foliar Sprays of Prohexadione–calcium, a Gibberellinbiosynthesis Inhibitor, Induce Chlorophyll Degradation and Carotenoid Synthesis in Citrus Rinds. Hortscience 2010; 45(2) : 242-247.

DODD MC, CRONJE PJR, TAYLOR MA, HUYSAMER M, KRUGER F, LÖTZE E, VAN DER MERWE K. A review of the post-harvest handling of fruits in south Africa over the past twenty five years. South African Journal of Plant and Soil 2010; 27(1) : 97-116.

DZIKITI S, VERREYNNE JS, STUCKENS J, SOMERS B, VERSTRAETEN W, SWENNEN R, COPPIN P. Hyperspectral remote sensing: prospects and challenges for monitoring fruit production. South African Fruit Journal 2010; 55 : 58.

DZIKITI S, VERREYNNE JS, STUCKENS J, STREVER AE, VERSTRAETEN WW, SWENNEN R, COPPIN P. Determining the water status of Satsuma mandarin trees [Citrus Unshiu Marcovitch] using spectral indices and by combining hyperspectral and physiological data. Agricultural and Forest Meteorology 2010; 150 : 369-379.

FOUCHE JR, ROBERTS SC, MIDGLEY SJE, STEYN WJ. Peel Color and Blemishes in 'Granny Smith' Apples in Relation to Canopy Light Environment. Hortscience 2010; 45(6) : 899-905.

GRAHAM S, STEPHENS IA, JACOBS G. Effect of carbohydrate supplementation on Leucospermum chilling injury. Acta Horticulturae 2010; 869 : 219-222.

GERBER HJ, STEYN WJ, THERON KI. The optimum one-year-old Shoot Length To Optimize Yield and Fruit Size of Three Fig (Ficus carica L.) Cultivars. Hortscience 2010; 45(9) : 1321-1326.

HOFFMAN EW, JACOBS G. Phenology of and heat unit requirements for growth in Protea 'Carnival' induced by Benzyladenine-containing growth regulators. Acta Horticulturae 2010; 869 : 71-80.

JACOBS G. System for production of out-of-season Protea cut flowers. Acta Horticulturae 2010; 869 : 59-62.

LE ROUX S, BARRY GH. Vegetative Growth Responses of Citrus Nursery Trees to Various Growth Retardants. Horttechnology 2010; 20(1) : 197-201.

LÖTZE E, THERON KI, JOUBERT J. Assessment of Pre-Harvest Physiological Infiltration methods for predicting commercial Bitter Pit in 'Braeburn' and 'Golden Delicious'. Acta Horticulturae 2010; 868 : 347-352.

LOUW ED, THERON KI. Robust prediction models for quality parameters in Japanese plums (Prunus salicina L.) using NIR spectroscopy. Postharvest Biology and Technology 2010; 58 : 176-184.

NIEUWOUDT G, JACOBS G. Time of pruning affects yield, flowering time and flower quality of Protea 'Pink Ice'. Acta Horticulturae 2010; 869 : 63-70.

OPARA LU, AL-ANI MR. Antioxidant components in fresh-cut and whole fruit and vegetables. British Food Journal 2010; 112(8) : 797-810.

OPARA LU, AL-ANI MR. Effects of cooking methods on carotenoids content of Kingfish. British Food Journal 2010; 112(8) : 811-820.

OPARA LU, JACOBSON D, AL-SAADY NA. Analysis of genetic diversity in banana cultivars (Musa cvs.) from the South of Oman using AFLP markers and classification by phylogenetic, hierarchical clustering and principal component analyses. Biomedical and Life Sciences 2010; 11(5) : 332-341.

SCHMEISSER M, STEYN WJ, JACOBS G. Regreening of involucral leaves of female Leucadendron (Proteaceae) after flowering. Australian Journal of Botany 2010; 58(7) : 586-596.

SOMERS B, DELALIEUX S, VERSTRAETEN W, VAN DEN EYNDE A, BARRY GH, COPPIN P. The Contribution of the Fruit Component to the Hyperspectral Citrus Canopy Signal. Photogrammetric Engineering and Remote Sensing 2010; 76(1) : 37-47.

STUCKENS J, SOMERS B, ALBRIGO GL, DZIKITI S, VERSTRAETEN W, SWENNEN R, VERREYNNE JS, COPPIN P. Off-nadir viewing for reducing spectral mixture issues in citrus orchards. Photogrammetric Engineering and Remote Sensing 2010; 76(11) : 1261-1274.

VAN SCHOOR L, DENMAN SJS, COOK NC. Characterisation of apple replant disease under South African conditions and potential biological management strategies. Scientia Horticulturae 2009; 119 : 153-162.

VERREYNNE JS, MUPAMBI G. Effects of 2,4-D on the Size of the navel-End Opening and Fruit Quality of 'Washington' Navel Orange. Acta Horticulturae 2010; 884 : 745-751.

​WINDELL NE, STEPHENS IA, JACOBS G, HOFFMAN EW. Effect of Ethanol vapour on leaf blackening of selected Protea species. Acta Horticulturae 2010; 869 : 135-142.