| 1. |
- Abouhatab, Assem, et al.
(author)
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Determinants of import demand for Egyptian potatoes in Germany and the United Kingdom
- 2016
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In: Acta Horticulturae. - 0567-7572 .- 2406-6168. ; 1132, s. 39-48
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Conference paper (other academic/artistic)abstract
- The European Union (EU) is the major import market for Egyptian fresh potatoes. Germany and the United Kingdom (UK) jointly imported about 44% of Egyptian potato exports to the EU during the period 1994-2012. This study sought to identify the determinants of import demand for Egyptian potatoes in these two countries. A general differentiated demand system approach was used to estimate conditional potato import demand per country. For each country, it was assumed that the system of conditional import demand equations for potatoes is specified according to the sources of origin and also depends on all imported potato prices and total import potato expenditure. When estimated econometrically, this import demand model allows conditional price and expenditure elasticities to be derived. The econometric results indicated that with an estimated elasticity of 1.95, Egyptian potato exports responded significantly to total expenditure on imported potatoes by Germany. On the other hand, Egyptian potato exports to Germany did not exhibit significant price responses. In all cases but one, estimated conditional uncompensated price elasticities were not statistically different from zero. However, more interesting results were obtained concerning the price responses of Egyptian potato exports to the UK, whereby the conditional (uncompensated) direct elasticity of potato imports from Egypt to the UK (-0.71) showed an inelastic response to its own price. Furthermore, Egyptian potato exports seemed to compete on the UK market with potatoes originating from Israel and France, while they displayed complementarity with Dutch imports.
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| 2. |
- Abouhatab, Assem, et al.
(author)
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Exchange rate uncertainty and Egyptian exports of horticultural commodities into the EU
- 2019
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In: Acta Horticulturae. - 0567-7572 .- 2406-6168. ; 1258, s. 11-18
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Conference paper (peer-reviewed)abstract
- This paper investigates the impact of exchange rate volatility on Egyptian exports of fresh fruit and vegetables (FFVs) to their major importing markets in the EU. Using quarterly data covering the period 1994-2016, we examine the determinants of Egypt’s exports of FFVs to the EU, and then derive the long-term effects of exchange rate volatility on the FFV exports. The empirical results show that exchange rate volatility has a long-run significant effect on Egypt’s FFV exports to the EU. Overall, the findings highlight the importance of exchange rate volatility in understanding the behavior of Egyptian exports of FFVs to the EU. Thus, the design and implementation of exchange rate policies and export promotion programs in Egypt should take into consideration the stability and level of the real exchange rate.
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| 3. |
- Ahmadi Afzadi, Masoud, et al.
(author)
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Genetics of resistance to blue mould in apple: inoculation-based screening, transcriptomics and biochemistry
- 2016
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In: Acta Horticulturae. - 0567-7572 .- 2406-6168. ; 1127, s. 55-60
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Conference paper (peer-reviewed)abstract
- Blue mould caused by Penicillium expansum is a major contributor to loss of marketable fruit during storage. Damage is also aggravated by the prohibition of postharvest fungicides in many countries, and in organic production everywhere. Robust data on levels of resistance to this disease are crucial for further research and for breeding of improved cultivars. Inoculation of fruit with fungal spores and estimation of the diameter of resulting lesions after cold storage demonstrated significant variation among cultivars. In addition, cultivars with high firmness at harvest and little softening, i.e., loss of firmness during storage, had less susceptibility, as also did late-ripening cultivars. In another part of the study, a possible association between lesion diameter and chemical contents in fruit flesh and fruit peel of 23 cultivars was investigated. Content of different quercetins and procyanidin B2 was positively associated with the level of tolerance. Samples taken after inoculation showed stronger association with the chemical contents than did samples of control fruit, suggesting that disease development had triggered a defence reaction. In a third part of the study, gene regulation in apple fruit after inoculation was evaluated in two relatively resistant and two relatively susceptible cultivars using an AryANE chip covering 60K apple transcripts. Validation of the most highly up-and down-regulated genes was undertaken using qPCR. Some genes related to disease resistance, biosynthesis of flavonoids and to cell-wall structure were identified as most likely to be responsible for differences in susceptibility to blue mould. These results will be used to search for candidate genes that can be used in marker-assisted selection in apple breeding.
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| 6. |
- Alsanius, Beatrix
(author)
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Vision of COST BioGreenhouse
- 2017
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In: Acta Horticulturae. - 0567-7572 .- 2406-6168. ; 1164, s. 1-8
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Conference paper (peer-reviewed)abstract
- Good food is the basis of a healthy, active life. Horticulture provides fresh commodities rich in minerals, fibres and bioactive compounds, and thereby contributes to a healthy diet. Integrated and organic horticultural production, either indoors or outdoors, contribute to food provisioning. For food and nutrition security, food must be: 1) present in sufficient quantities, 2) physically, economically and socially accessible and affordable, 3) nutritious, with a quality that meets dietary needs and preferences, 4) safe and 5) supported by an adequate environment regarding sanitation, health service and care. To pursue the ambition of developing organic horticulture in greenhouses and high tunnels into an active player within the food system and foodservice, a shift in paradigm is needed - organic protected horticulture needs to redefine itself from being a resource provider/supplier, mainly focusing on production systems and environment, to being an active player in the arena of grand global challenges and human health-integrating societal aspects, e.g., well-being. Organic greenhouse horticulture not only addresses, but also delivers, key solutions in some areas of conflicts, such as land, water and energy use and recycling of resources. In addition, it offers opportunities for empowerment of rural and urban areas. Most research on organic horticulture considers organic greenhouse production systems and production environments. The BioGreenhouse vision considers interactivities between the environmental and societal sphere of food. Innovative organic approaches are a critical precondition for improvement. The potential of organic greenhouse horticulture needs to be brought to the awareness of policy makers. Research to explore the multilevel and multidisciplinary as well as multistakeholder interactions of organic production in greenhouses and high tunnels must be encouraged, by all necessary means.
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| 8. |
- Bergstrand, Karl-Johan, et al.
(author)
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Growth control of ornamental and bedding plants by manipulation of photoperiod and light quality
- 2016
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In: Acta Horticulturae. - 0567-7572 .- 2406-6168. ; 1134, s. 33-39
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Conference paper (peer-reviewed)abstract
- Altering the light regime is a sound and non-polluting way of controlling the growth of greenhouse-grown pot and bedding plants, and a promising way of eliminating the use of chemical plant growth regulators (PGRs), which are now becoming less available and more questioned by consumers. Modern greenhouses often have blackout screens, originally installed for flower regulation purposes but which can also be used for growth regulation. Modern light emitting diode (LED) light sources can be designed to provide narrow-band light (NBL), which can affect growth and elongation of plants if given in addition to natural sunlight, or as daylight extension (end-of-day or pre-day treatments). Two different approaches were used: short photoperiods in combination with pre-day and end-of-day NBL treatments, and short photoperiods combined with simultaneous addition of NBL and natural light. The plants used were Calibrachoa, Pelargonium, Euphorbia, and Chrysanthemum. A light regime with 620 nm light given before the period of natural light and 525 nm light given at the end of the natural light effectively controlled elongation in both Calibrachoa and Pelargonium. Supplementation of natural sunlight with a small portion of 660 nm light significantly reduced plant height in Euphorbia, but not in Chrysanthemum. It was concluded that management of photoperiod and light quality is very promising for replacing PGRs within greenhouse production of ornamental and bedding plants.
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