Horticultural Science, 2012 (vol. 39), issue 2
Rootstock effect on the performance of sweet cherry cv. LapinsOriginal Paper
J. Lanauskas, N. Uselis, D. Kviklys, N. Kvikliené, L. Buskiené
Hort. Sci. (Prague), 2012, 39(2):55-60 | DOI: 10.17221/50/2011-HORTSCI 
Twelve clonal rootstocks of sweet cherry grafted with the cv. Lapins were tested. Each graft combination included 18 trees divided into six randomized blocks. The trees were spaced at 5 × 3 m and trained as spindles. Tree vigour, yield, fruit size, fruit quality and yield efficiency were evaluated for eleven subsequent years. According to trunk diameter, the most vigorous rootstocks were Gi 497/8, Gi 154/7, Gisela 4 and P-HL-A; 32-41% larger compared with the standard Gisela 5. The highest cumulative yield per tree and yield efficiency were recorded on the rootstocks Gi 154/7 and Gisela 4. The lowest yield was recorded on Damil, Gi 209/1, Gi 195/20,...
Changes in chemical properties of soil and sour cherry as a result of sewage sludge application
I. Angin, R. Aslantas, M. Kose, H. Karakurt, G. Ozkan
Hort. Sci. (Prague), 2012, 39(2):61-66 | DOI: 10.17221/4/2011-HORTSCI
This study, aimed at assessment of the effects of different sewage sludge application rates on heavy metal accumulation in the soil and in sour cherry leaves was carried out in the years 2005-2007. The rates applied were 0.0, 2.5, 5.0, 7.5, 10.0 and 12.5 kg of dry matter per tree. Eighteen uniform one-year-old Kütahya sour cherry trees on Prunus mahaleb rootstock were used. Sewage sludge not only improved soil chemical properties but also resulted in an increase of nutrient content in cherry leaves. Sewage sludge application increased heavy metal content of soils. However, this increase did not exceed the critical values and was not reflected...
Microelements content in leaves of raspberry cv. Willamette as affected by foliar nutrition and substrates
Ž. Karaklajić-Stajić, I.S. Glišić, Dj. Ružić, T. Vujović, M. Pešaković
Hort. Sci. (Prague), 2012, 39(2):67-73 | DOI: 10.17221/80/2011-HORTSCI
Raspberry (Rubus idaeus L.) cultivar Willamette has long been the most commonly grown raspberry cultivar in Serbia, which is owing to high adaptability of the cultivar to respective agro-environmental conditions. Massive dieback of full bearing plantings is a major problem in raspberry growing hence quality planting material is a must when establishing new raspberry plantings. The study was conducted under protected conditions (in screenhouse) on plants obtained by micropropagation in vitro. In order to achieve optimal vegetative potential, plants were grown for two consecutive years (2004-2005) on two substrates (Steckmedium and...
Diminished UV radiation reduces the spread and population density of Macrosiphum euphorbiae (Thomas) [Hemiptera: Aphididae] in lettuce crops
S. Legarrea, B.M. Diaz, M. Plaza, L. Barrios, I. Morales, E. Viñuela, A. Fereres
Hort. Sci. (Prague), 2012, 39(2):74-80 | DOI: 10.17221/79/2011-HORTSCI
UV-absorbing covers reduce the incidence of injurious insect pests and viruses in protected crops. In the present study, the effect of a UV-absorbing net (Bionet) on the spatio-temporal dynamics of the potato aphid on lettuce plants was evaluated. A field experiment was conducted during three seasons in two identical tunnels divided in four plots. A set of lettuce plants were artificially infested with Macrosiphum euphorbiae adults and the population was estimated by counting aphids on every plant over 7 to 9 weeks. Insect population grew exponentially but a significantly lower aphid density was present on plants grown under the UV-absorbing...
Comparison between conventional and organic weed management: growth and yield of leek (Allium porrum L.)
A. Karkanis, D. Bilalis, A. Efthimiadou, N. Katsenios
Hort. Sci. (Prague), 2012, 39(2):81-88 | DOI: 10.17221/162/2011-HORTSCI
Leek is a weak competitor against weeds. A field experiment was conducted to determine the effects of herbicides and mulching on weed flora, growth and yield of a leek crop. A randomized complete block design was employed with five replicates per treatment (control, mulching with barley straw, post-transplant application of the herbicide oxyfluorfen at 360 g a.i./ha and pre-transplant application of pendimethalin at 1,650 g a.i./ha). The order of weed sensitivity to mulches was black nightshade (72-85%), venice mallow (80%) > redroot pigweed (70-74%), barnyardgrass (67-77%) > jimsonweed (65%) > common purslane (42-45%). Oxyfluorfen had the...
Attractiveness of flowering plants for natural enemies
T. Kopta, R. Pokluda, V. Psota
Hort. Sci. (Prague), 2012, 39(2):89-96 | DOI: 10.17221/26/2011-HORTSCI
The set of 7 flowering plant species (Anethum graveolens, Calendula officinalis, Centaurea cyanus, Fagopyrum esculentum, Foeniculum vulgare, Tagetes patula and Vicia faba) was compared for their attractiveness to natural enemies such as ladybeetles (Coccinellidae), hoverflies (Syrphidae), ichneumon wasps (Ichneumonidae) and predatory bugs (Orius spp.) during the years 2008-2010. The trial was held in an organic open field located at the Faculty of Horticulture of Mendel University in Brno, Lednice, Czech Republic. The software Canoco (RDA analysis) was used in order to see the relations between plant and insect communities....
Promotive effects of 5-aminolevulinic acid on photosynthesis and chlorophyll fluorescence of tomato seedlings under suboptimal low temperature and suboptimal photon flux density stress - Short communication
Xiaoqing Guo, Yansu Li, Xianchang Yu
Hort. Sci. (Prague), 2012, 39(2):97-99 | DOI: 10.17221/122/2011-HORTSCI
Effects of 5-aminolevulinic acid (ALA) on photosynthetic characteristics of tomato grown under suboptimal conditions were investigated to evaluate the potential value of ALA spraying in vegetables. The net photosynthetic rate (Pn), stomatal conductance (Gs), maximum quantum efficiency of photosystem II (Fv/Fm), coefficient of photochemical quenching (qP), antenna transformation efficiency (Fv'/Fm'), light compensation point (LCP), CO2 compensation point (CCP) and chlorophyll (chl) contents of tomato stressed by suboptimal temperature (17°C/12°C) and suboptimal photon flux density (250 μmol/m2s) were decreased, but intercellular...
An Obituary Notice
M. Valšíková
Hort. Sci. (Prague), 2012, 39(2):100 | DOI: 10.17221/5909-HORTSCI
Karel Kopec, horticultural scientist; ⃰ March 9, 1929 - † April 9, 2012