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Balla I.,Research Institute for Fruitgrowing and Ornamentals | Mansvelt L.,ARC Institute for Fruit
Methods in Molecular Biology | Year: 2013

Peach (Prunus persica (L.) Batsch) is one of the most popular stone fruits, commercially produced largely in Mediterranean and, to a lesser extent, in continental climatic conditions. Several breeding programs with different aims release annually large numbers of new cultivars. Micropropagation offers a suitable method to provide the growers of sufficient quantities of rootstocks, as well as of pathogen-free planting material of old and new cultivars. An effective four-step micropropagation procedure for cultivar and rootstock production is described here, based on the use of modified MS and WPM media. The health status of the initial shoot tips is very important, also because the growth and proliferation rate of shoot cultures from virus-infected clones are generally very poor. Proliferation and elongation phases depend on the major macro-elements, as well as the content and ratio of plant growth regulators. It is important to grow the cultures at 22 C, as hyperhydricity may develop at higher temperatures. Although sucrose is the most common carbon source used during proliferation and rooting, for some peach cultivars and rootstocks the replacement of sucrose (10 g/L) with glucose (20 g/L) in the rooting medium improves the rooting and survival rates of plants in the acclimatization phase. The rooting rate of the rootstock "Cadaman" is improved with the chelated form of iron FeEDDHA at 150 mg/L. Rooted plants are acclimatized in greenhouse under high humidity conditions. © 2013 Springer Science+Business Media New York.

Baric B.,University of Zagreb | Pajac Zivkovic I.,University of Zagreb | Matosevic D.,Croatian Forest Research Institute | Subic M.,Croatian Agricultural Advisory Service | And 2 more authors.
Poljoprivreda | Year: 2015

Walnut husk fly (WHF), Rhagoletis completa Cresson 1929 is an invasive species spreading quickly and damaging walnuts in Croatia and neighbouring countries. We researched distribution of this pest in the continental part of Croatia, flight dynamics in Međimurje County and its influence on quality of walnut kernels. CSALOMON® PALz traps were used for monitoring the spread and flight dynamics of R. completa. Weight and the protein content of kernels and the presence of mycotoxin contamination were measured. Walnut husk fly was found in six counties (Istria County: pest reconfirmation, Zagreb County, The City of Zagreb, Varaždin County, Međimurje County and Koprivnica-Križevci County). The presence of the fly was not confirmed on one site in Koprivnica-Križevci County (locality Ferdinandovac) and in the eastern part of Croatia (Vukovar-Srijem County: Vinkovci locality). The flight dynamics showed rapid increase in number of adults only a year after the introduction into new area. The weight of infested kernels was 5.81% lower compared to not infested. Protein content was 14.04% in infested kernels and 17.31% in not infested kernels. There was no difference in mycotoxins levels. Additional researches on mycotoxin levels in stored nuts, ovipositional preferences of walnut husk fly and protection measures against this pest are suggested. © 2015, Faculty of Agriculture in Osijek. All rights Reserved.

Bujdoso G.,Research Institute for Fruitgrowing and Ornamentals | Bujdoso G.,Corvinus University of Budapest | Toth-Markus M.,Central Food Research Institute | Daood H.,Central Food Research Institute | And 2 more authors.
Acta Alimentaria | Year: 2010

Eight registered Hungarian walnut cultivars were tested for composition and sensory properties. The samples were collected at the Experimental Fields of the Research Institute for Fruitgrowing and Ornamentals in Ird-Elvira major. Proximate composition, fatty acids, minerals (P, Na, Ca, Mg, Ca, Fe and Se), polyphenols and vitamins (C, E) were determined in four consecutive years 2003-2006. The tested cultivars have an oil content, which falls within the upper range of the literature values. Polyphenols, iron and selenium contents are also high while the values for potassium and phosphorus are in the lower part of the given range. In our case, the crop years make a larger difference in the composition than the cultivars. Tiszacsécsi 83 is the only cultivar slightly differing from the others in lower mineral and protein content. © 2010 Akadémiai Kiadó, Budapest.

Steger-Mate M.,Corvinus University of Budapest | Ficzek G.,Corvinus University of Budapest | Kallay E.,Research Institute for Fruitgrowing and Ornamentals | Bujdoso G.,Research Institute for Fruitgrowing and Ornamentals | And 2 more authors.
Acta Alimentaria | Year: 2010

The variation of some compositional quality parameters in connection with ripening time in the case of four sour cherry varieties ( Prunus cerasus L. Mill.) was studied. Our aim was to optimize the harvest time on the basis of antioxidant capacity. The experiments were carried out in the Ird-Elvira orchards of the Research Institute for Fruitgrowing and Ornamentals (cultivars Irdi botermo, Kántorjánosi 3) and in orchards of the Agárd Frucht Ltd. in Agárd (cultivars Irdi jubileum, Maliga emléke). Anthocyanin, polyphenol and vitamin C contents as well as the water-soluble dry matter content of fruits were measured.According to the results of quality parameter measurements it can be stated, that in case of the studied cultivars the optimal picking time for industrial processing is the second picking. At this time the anthocyanin, polyphenol and water-soluble dry matter content of the cultivars are optimal. In general, at the end of the ripening period the fruits shrink, fruit weight and juiciness decreases as a consequence of water loss, therefore determining optimal harvest time for the desired utilization purpose is very important. According to our results, out of the four studied cultivars, Irdi jubileum has the highest values regarding anthocyanin and polyphenol contents. © 2010 Akadémiai Kiadó, Budapest.

Apostol J.,Research Institute for Fruitgrowing and Ornamentals
Acta Horticulturae | Year: 2014

The Hungarian sweet and sour cherry breeding program began in 1950, and has released 12 sweet and 9 sour cherry varieties. The sweet cherry varieties released in the last 10 years include: 'Alex' (1997), 'Kavics' (1999), 'Vera' (2002), 'Rita' (2004), 'Sandor' (2004), 'Petrus' (2004), 'Aida' (2006), 'Carmen' (2006), 'Paulus' (2008) and 'Annus' ('Anita') (2010). During this time, there has also been one sour cherry released: 'Piramis' (2004), and there is one sour cherry candidate variety: 'Dukat'.

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