Template-Type: ReDIF-Article 1.0 Author-Name: editors Title: Index of volume 42 Journal: Horticultural Science Pages: I-II Volume: 42 Issue: 4 Year: 2015 DOI: 10.17221/8568-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/8568-HORTSCI.html File-Format: text/html Handle: RePEc:caa:jnlhor:v:42:y:2015:i:4:id:8568-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: W. Warabieda Author-Workplace-Name: Research Institute of Horticulture in Skierniewice, Skierniewice, Poland Title: Effect of two-spotted spider mite population (Tetranychus urticae Koch) on growth parameters and yield of the summer apple cv. Katja Abstract: The effect of two-spotted spider mite populations (Tetranychus urticae Koch) on the yield and growth parameters of the early-season apple cv. Katja was evaluated during a 3-year study. In the case of the colonisation of apple trees exceeding 1,462, 2,760 and 1,548 cumulative mite days (CMDs) in the subsequent years of research, a significant reduction of the cumulative yield (14 kg/tree) and of the cumulative trunk cross sectional area increase (5.7 cm2) was observed. No significant effect of spider mites on the average weight of the fruit was observed, while the pest affected fruit colouration. The calculated values of economic injury level were 60.5, 155.5 and 51.8 CMDs in subsequent years of the study, respectively. These values are much lower than the action threshold recommended in Poland and elaborated for the European red mite - Panonychus ulmi (Koch) on apple trees. The results suggest that the tolerance of early-season apple cultivars to T. urticae may be lower when compared to late-season varieties infested with P. ulmi; therefore, the decision to implement pest management for two-spotted spider mite should be taken at a lower infestation threshold than previously thought. Keywords: economic injury level, action threshold Journal: Horticultural Science Pages: 167-175 Volume: 42 Issue: 4 Year: 2015 DOI: 10.17221/259/2014-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/259/2014-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-201504-0002.txt Handle: RePEc:caa:jnlhor:v:42:y:2015:i:4:id:259-2014-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: G. Đurić Author-Workplace-Name: Genetic Resources Institute, Faculty of Agriculture, University of Banja Luka, Banja Luka, Republika Srpska, Bosnia and Herzegovina Author-Workplace-Name: Genetic Resources Institute, University of Banja Luka, Banja Luka, Republika Srpska, Bosnia and Herzegovina Author-Name: M. Žabić Author-Workplace-Name: Genetic Resources Institute, Faculty of Agriculture, University of Banja Luka, Banja Luka, Republika Srpska, Bosnia and Herzegovina Author-Name: M. Rodić Author-Workplace-Name: Genetic Resources Institute, University of Banja Luka, Banja Luka, Republika Srpska, Bosnia and Herzegovina Author-Name: S. Stanivuković Author-Workplace-Name: Genetic Resources Institute, University of Banja Luka, Banja Luka, Republika Srpska, Bosnia and Herzegovina Author-Name: B. Bosančić Author-Workplace-Name: Genetic Resources Institute, Faculty of Agriculture, University of Banja Luka, Banja Luka, Republika Srpska, Bosnia and Herzegovina Author-Name: B. Pašalić Author-Workplace-Name: Genetic Resources Institute, Faculty of Agriculture, University of Banja Luka, Banja Luka, Republika Srpska, Bosnia and Herzegovina Title: Biochemical and pomological assessment of European pear accessions from Bosnia and Herzegovina Abstract: The research on 10 old and indigenous pear cultivars was conducted during 2012 and 2013 in Bosnia and Herzegovina. The following characteristics were determined: fruit weight, fruit length and width, stalk length and width, fruit flesh firmness; soluble solids content and total dry matter content of the fruit juice; pH, titratable acidity, vitamin C, total phenolics, total flavonoids and antioxidant activity of the fruit cell juice. On the basis of the Principal Component Analysis (PCA) of pomological fruit characteristics the studied cultivars were divided into four main groups. Based on the PCA of biochemical traits the studied cultivars can be divided into three groups. Extremely high phenolic content in the cvs Mioljnjača, Žutica, Poljakinja, Karamut and Gradišćanka recommends them for their inclusion in a breeding programme. The cvs Mioljnjača and Poljakinja are also characterised by large and firm fruit and since the antioxidant capacity affects the duration of fruit storage, it is expected that these traditionally grown varieties can survive longer and keep their valuable nutritional ingredients longer. Keywords: fruits, antioxidant activity, Principal Component Analysis Journal: Horticultural Science Pages: 176-184 Volume: 42 Issue: 4 Year: 2015 DOI: 10.17221/53/2015-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/53/2015-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-201504-0003.txt Handle: RePEc:caa:jnlhor:v:42:y:2015:i:4:id:53-2015-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: V. Sarropoulou Author-Workplace-Name: Laboratory of Pomology, Department of Horticulture, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece Author-Name: K. Dimassi-Theriou Author-Workplace-Name: Laboratory of Pomology, Department of Horticulture, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece Author-Name: I. Therios Author-Workplace-Name: Laboratory of Pomology, Department of Horticulture, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece Title: Medium strength in inorganics and PVP concentration effects on cherry rootstocks in vitro rooting Abstract: The effects of two strength media (full and half) in inorganics and five polyvinylpyrrolidone (PVP) concentrations combined with 1 mg/l indole-3-butyric acid on the in vitro rooting of the CAB-6P, Gisela 6 and M × M 14 cherry rootstocks were investigated. For the CAB-6P, root number (5.80) was greatest by adding 5 g/l PVP to the half strength medium and 1 g/l PVP resulted in 80% rooting percentage. For Gisela 6, 1 g/l PVP in half strength medium led to the highest root number (6.30) as well as the highest rooting percentage (90.91%). On the contrary, root length was maximum (36.17 mm) in the full strength medium without adding PVP. In M × M 14, root number was maximum (8.33) in the PVP-free full strength medium, rooting percentage was 100% by adding 5 g/l PVP to either full or half strength medium and root length was greatest by incorporating 1 or 2.5 g/l PVP into the half strength medium. PVP seems to be a promising rooting agent in tissue culture systems. Keywords: antioxidants, auxins, callus formation, plant tissue culture, rhizogenesis Journal: Horticultural Science Pages: 185-192 Volume: 42 Issue: 4 Year: 2015 DOI: 10.17221/359/2014-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/359/2014-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-201504-0004.txt Handle: RePEc:caa:jnlhor:v:42:y:2015:i:4:id:359-2014-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: A. Stachowiak Author-Workplace-Name: Department of Dendrology and Nursery Production, Faculty of Horticulture and Landscape Architecture, Poznań University of Life Sciences, Poznań, Poland Author-Name: M. Bosiacki Author-Workplace-Name: Department of Plant Nutrition, Faculty of Horticulture and Landscape Architecture, Poznań University of Life Sciences, Poznań, Poland Author-Name: S. Świerczyński Author-Workplace-Name: Department of Dendrology and Nursery Production, Faculty of Horticulture and Landscape Architecture, Poznań University of Life Sciences, Poznań, Poland Author-Name: M. Kolasiński Author-Workplace-Name: Department of Dendrology and Nursery Production, Faculty of Horticulture and Landscape Architecture, Poznań University of Life Sciences, Poznań, Poland Title: Influence of rootstocks on different sweet cherry cultivars and accumulation of heavy metals in leaves and fruit Abstract: Two seedling rootstocks of Mahaleb cherry (Prunus mahaleb L.) from a German type cv. Alpruna marked as No. 2 and No. 6 were selected for their semi-dwarfing properties from biotypes growing at the Rural Experimental Station in Baranowo belonging to the University of Life Sciences in Poznan, Poland. In an orchard experiment in 2012-2013, growth and yield of eight- and nine-year old trees of the cvs Regina, Summit and Vanda were studied. These cultivars were grafted on Mahaleb cherry No. 2 and No. 6 and were compared to the control rootstock Mazzard (Prunus avium L.) cv. Alkavo. The Mahaleb cherry biotypes significantly decreased the trunk cross-sectional area and the crown volume of the trees. The cultivars grafted on Mahaleb cherry biotypes No. 2 and No. 6 had more flowers and they gave a higher yield. The yield efficiency for cultivars grafted on these rootstocks was higher than for rootstock Mazzard. Significant differences of the concentration of the elements were found for Fe, Cu, Zn in fruit and for Fe, Cu and Cr in leaves. Presence of Pb and Cr was not detected in sweet cherry fruit. Keywords: new rootstocks, Prunus mahaleb, orchard, fruit tree, flowering, growth, yield Journal: Horticultural Science Pages: 193-202 Volume: 42 Issue: 4 Year: 2015 DOI: 10.17221/141/2014-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/141/2014-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-201504-0005.txt Handle: RePEc:caa:jnlhor:v:42:y:2015:i:4:id:141-2014-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: M. Lewandowski Author-Workplace-Name: Research Institute of Horticulture, Skierniewice, Poland Author-Name: E. Żurawicz Author-Workplace-Name: Research Institute of Horticulture, Skierniewice, Poland Author-Name: K. Pruski Author-Workplace-Name: Department of Plant & Animal Sciences, Faculty of Agriculture, Dalhousie University, Truro, Canada Title: Effects of the growing season extension on Polish primocane-fruiting raspberry cultivars Abstract: Three primocane-fruiting raspberry cvs, Polana, Polka and Polesie, were evaluated for their performance under various early spring coverings during the 2010-2013 growing seasons. Three cultivation techniques were compared: covering plants with perforated plastic cover, covering plants with fibre cover (in early spring, for a period of about 1 month), mowing of young canes in the middle of May; the control combination were plants without covers and not mown. During each growing season, plant growth vigour, yielding and fruit quality (soluble solids and vitamin C content) were assessed. The use of low covers (perforated plastic cover and fibre cover) advanced the fruit ripening of the tested cultivars by about 2 weeks. The covers of raspberry plants also increased significantly yield of the early fruit (harvested in July and August) compared with the control. The investigated techniques can be recommended for implementation and use on commercial raspberry plantations to force early fruiting and thus increase their production potential in the summer-autumn period. Keywords: Rubus idaeus L., perforated plastic cover, fibre cover, shoot mowing, yield, fruit quality Journal: Horticultural Science Pages: 203-208 Volume: 42 Issue: 4 Year: 2015 DOI: 10.17221/306/2014-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/306/2014-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-201504-0006.txt Handle: RePEc:caa:jnlhor:v:42:y:2015:i:4:id:306-2014-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: L. Růžek Author-Workplace-Name: Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: M. Růžková Author-Workplace-Name: Central Institute for Supervising and Testing in Agriculture, Brno, Czech Republic Author-Name: M. Koudela Author-Workplace-Name: Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: L. Bečková Author-Workplace-Name: Department of Crop Production, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: D. Bečka Author-Workplace-Name: Department of Crop Production, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: Z. Kruliš Author-Workplace-Name: Institute of Macromolecular Chemistry AS CR, Prague, Czech Republic Author-Name: E. Šárka Author-Workplace-Name: Department of Carbohydrates and Cereals, University of Chemistry and Technology Prague, Prague, Czech Republic Author-Name: K. Voříšek Author-Workplace-Name: Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: Š. Ledvina Author-Workplace-Name: Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: B. Šalounová Author-Workplace-Name: Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: J. Venyercsanová Author-Workplace-Name: Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic Title: Biodegradation of composites based on maltodextrin and wheat B-starch in compost Abstract: The study is focused on the microbial and chemical parameters of green compost in which composites based on acetylated wheat B-starch and maltodextrin (patented procedure) were biodegraded and also on the parameters of lettuce grown on this compost before and after the biodegradation. With a load of up to 1 g of composites per 1 l of compost, and with a storage period of 0, 7-14, 15-20 and 21-147 days, mixture of compost wiped off the surface both of well-preserved composites and of the immediate surroundings of their residues was evaluated. Microbial biomass, basal respiration (BR), metabolic quotient, dehydrogenase and arylsulfatase activity (ARS) and the parameters of the lettuce growth on this compost did not show any negative changes. On the contrary acetylated wheat B-starch and maltodextrin stimulated both ARS and BR. ARS showed the most rapid onset among all tests. The height of the aboveground parts of the lettuce (Lactuca sativa L. var. capitata) grown on green compost was significantly better, compared to commercial peat-based substrates. Keywords: biodegradable plastics, acetylated maltodextrin, lettuce, arylsulfatase Journal: Horticultural Science Pages: 209-214 Volume: 42 Issue: 4 Year: 2015 DOI: 10.17221/219/2014-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/219/2014-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-201504-0007.txt Handle: RePEc:caa:jnlhor:v:42:y:2015:i:4:id:219-2014-HORTSCI Template-Type: ReDIF-Article 1.0 Author-Name: T. Bohinc Author-Workplace-Name: Department of Agronomy, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia Author-Name: D. Žnidarčič Author-Workplace-Name: Department of Agronomy, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia Author-Name: S. Trdan Author-Workplace-Name: Department of Agronomy, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia Title: Comparison of field efficacy of four natural fungicides and metiram against late blight (Phytophthora infestans [Mont.] de Bary) on tomato - Short Communication Abstract: Fungicidal activity of asaronaldehyde, soybean lecithin, garlic extract, salicylic acid, and metiram against late blight on tomato was investigated in a field block experiment. Significantly the lowest severity index was detected on plants treated with metiram, while there were no significant differences among plants treated with different natural substances. Mean mass of healthy tomatoes was the highest on plants treated with metiram. It was assumed that severity index was mainly influenced by abiotic factors, especially rain. None of the natural fungicides tested showed satisfactory efficacy against the late blight, therefore new environmentally friendly substances should be studied with the aim of their implementation into sustainable field-grown tomato production. Keywords: abiotic factors, biotic factors, Lycopersicum esculentum, Phytophthora infestans, natural substances, yield Journal: Horticultural Science Pages: 215-218 Volume: 42 Issue: 4 Year: 2015 DOI: 10.17221/366/2014-HORTSCI File-URL: http://hortsci.agriculturejournals.cz/doi/10.17221/366/2014-HORTSCI.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/hor-201504-0008.txt Handle: RePEc:caa:jnlhor:v:42:y:2015:i:4:id:366-2014-HORTSCI