Horticultural Science, 2010 (vol. 37), issue 4
Index of Volume 37Index
editors
Hort. Sci. (Prague), 2010, 37(4):I-II | DOI: 10.17221/896-HORTSCI 
Effect of dwarfing and semi dwarfing apple rootstocks on growth and productivity of selected apple cultivars
J. Kosina
Hort. Sci. (Prague), 2010, 37(4):121-126 | DOI: 10.17221/20/2010-HORTSCI
Fourteen clonal apple rootstocks (M.9, M.26, M.27, MM.106, J-TE-E, J-TE-F, J-TE-G, J-TE-H, J-OH-A, Jork 9, Pajam 1, Pajam 2, Burgmer M.9-751, and Burgmer M.9-984) were tested in two experimental orchards established in the Research and Breeding Institute of Pomology Holovousy using scion cultivars Golden Delicious, Melrose, Jonagold, Rubin, and Florina. Following characteristics were recorded: yield, trunk circumference, suckering. Rootstocks Jork 9, Pajam 1, Pajam 2, M.9-751, and M.9-984 produced better results than original rootstock M.9. Clone J-TE-E favourably affected fruit-bearing of the Rubin cultivar. The growth vigour of trees grafted on Pajam...
Tree vigour, cropping, and phenology of sweet cherries in two systems of tree training on dwarf rootstocks
J. Blažková, H. Drahošová, I. Hlušičková
Hort. Sci. (Prague), 2010, 37(4):127-138 | DOI: 10.17221/60/2010-HORTSCI
Five cultivars and four rootstocks (Gisela 5, P-HL-A, P-HL-B, and Tabel Edabriz) were evaluated on trees in fruiting stage trained like spindle and on trellis. Tree vigour was significantly related to cultivar, rootstock and to tree training. Spindles were generally more vigorous than trees on trellis with exception of cv. Kordia. In several cases special combinations of cultivar, rootstock, and method of tree training differed significantly from mean effects of the three factors. Time of flowering was significantly dependent on the cultivar and varied annually within 15 days. Time of fruit harvest was also influenced by the rootstock and in two cases...
Control of Hoplocampa testudinea using the extract from Quassia amara in organic apple growing
V. Psota, J. Ouředníčková, V. Falta
Hort. Sci. (Prague), 2010, 37(4):139-144 | DOI: 10.17221/76/2009-HORTSCI
In 2008 and 2009 the effects of quassin and neoquassin (oxygenated triterpenes) on apple sawfly (Hoplocampa testudinea Klug, 1814) were studied. In the Czech Republic, monitoring was carried out in small-plot trials and in one laboratory experiment. The extract containing quassin and neoquassin was made by boiling wood chips of a tropical shrub Quassia amara L. (Sapindales: Simaroubaceae). The experimental dosages were 3, 4.5, 6, and 9.25 kg of wood chips/ha. Spray treatment with the quassia extract was carried out just before most larvae hatched out. It was statistically proven that the extract from the wood of Q. amara reduced...
Effect of low oxygen storage conditions on volatile emissions and anaerobic metabolite concentrations in two plum fruit cultivars
J. Goliáš, P. Hic, J. Kaňová
Hort. Sci. (Prague), 2010, 37(4):145-154 | DOI: 10.17221/78/2009-HORTSCI
By harvest time, small amounts of acetaldehyde were accumulated in the flesh of plums, such as 0.31 mg/l for the cv. Stanley and 1.03 mg/l for the cv. Valjevka. This relative difference in concentrations remained constant throughout the whole period of storage in a regular atmosphere. The long-term effects of higher concentrations of CO2 are the same as for very low oxygen concentrations; and significant amounts of ethanol accumulate in the tissue. Out of a total number of 42 different odour compounds identified in the juice, there were 11 alcohols, 6 aldehydes, 17 esters, 2 terpenes, 3 organic acids, and 1 lactone. Very low oxygen atmospheres...
Potassium and calcium enrichment alleviate salinity-induced stress in hydroponically grown endives
N.G. Tzortzakis
Hort. Sci. (Prague), 2010, 37(4):155-162 | DOI: 10.17221/1/2010-HORTSCI
Salinity either of soil or of irrigation water causes disturbance in plant growth and nutrient balance and reduces crop yields. The effects of NaCl salinity and/or calcium or potassium level on the plant growth and severity of gray mold (Botrytis cinerea [De Bary] Whetzel) were investigated in endive (Cichorium endivia L., cv. Green Curled) grown with the nutrient film technique under greenhouse conditions during early spring. Plants were supplied with nutrient solutions containing 40 mmol/l of sodium chloride (NaCl) and/or 10 mmol/l potassium sulphate (K2SO4). Additionally, plants treated with foliar spray of...