Plant Protection Science, 2014 (vol. 50), issue 3
Susceptibility of ten red clover (Trifolium pratense) cultivars to six viruses after artificial inoculationOriginal Paper
Jana Fránová, Hana Jakešová
Plant Protect. Sci., 2014, 50(3):113-118 | DOI: 10.17221/71/2013-PPS 
Seedlings of Trifolium pratense L. cultivars were mechanically inoculated with Czech isolates of Alfalfa mosaic virus (AMV), Clover yellow mosaic virus (ClYMV), Clover yellow vein virus (ClYVV), Red clover mottle virus (RCMV), White clover mosaic virus (WClMV), and a newly discovered member of the Cytorhabdovirus genus. WClMV infected 75.4% of clover seedlings; cv. Rezista was the most susceptible (93.3%), while cv. Fresko was the least susceptible (58.3%). RCMV infected 59.6% of plants; the most susceptible was cv. Tempus (77.6%), the least susceptible cv. Sprint (38.3%). While WClMV infected...
Differential phenolic accumulation in two Hypericum species in response to inoculation with Diploceras hypericinum and PseudomonasputidaOriginal Paper
CÜneyt Çirak, Jolita Radusiene, Hasan Murat Aksoy, Rimute Mackinaite, Zydrunas Stanius, Necdet Camas, Mehmet Serhat Odabas
Plant Protect. Sci., 2014, 50(3):119-128 | DOI: 10.17221/67/2012-PPS
The genus Hypericum L. (St. John's-wort, Hypericaceae) has received scientific interest in recent years, because it is a source of a variety of bioactive compounds including the phenolics. We determine whether the typical phenolic constituents of Hypericum plants, namely chlorogenic acid, rutin, hyperoside, isoquercetine, quercitrine, and quercetine, may be implicated as part of an inducible plant defence response in two St. John's-wortspecies, Hypericum perforatum L. and Hypericum triquetrifolium Turra. To achieve this objective, greenhouse-grown plantlets were inoculated with the fungal pathogen Diploceras...
Effect of flight activity of stem weevils (Ceutorhynchus napi, C. pallidactylus) and application time on insecticide efficacy and yield of winter oilseed rapeOriginal Paper
Tomáš Spitzer, Pavel Matušinský, Dagmar Spitzerová, Jan Bílovský, Jan Kazda
Plant Protect. Sci., 2014, 50(3):129-134 | DOI: 10.17221/21/2013-PPS
During 2010-2012, we monitored flight activity of male and female stem weevils (Ceutorhynchus napi, C. pallidactylus) using yellow water traps, the effectiveness of various application dates for the insecticide thiacloprid (72 g active ingredient/ha), and the influence on yield. The first occurrence of beetles in traps was recorded after soil temperature at 5 cm reached 8°C in all experimental years. In all years, males of C. pallidactylus dominated in the traps and the times of beetles' first occurrence. The most effective applications of thiacloprid at the stated rate were 14 days (2010), 6 days (2011), and 1 day (2012) after peak...
Sublethal effects of spinosad on some biochemical and biological parameters of Glyphodes pyloalis Walker (Lepidoptera: Pyralidae)Original Paper
Frouzan Piri, Ahad Sahragard, Mohammad Ghadamyari
Plant Protect. Sci., 2014, 50(3):135-144 | DOI: 10.17221/50/2013-PPS
The susceptibility of G. pyloalis larvae to spinosad was studied using the leaf dip method. Treatment with doses of spinosad sublethal concentrations (LC10, LC20, LC30, LC40 of 0.026, 0.045, 0.065, 0.090 ppm, respectively) was applied. A significant difference in the effects was observed between the sublethal concentrations (LC10, LC20, LC30, and LC40) and the control in the content of carbohydrate and glycogen, and between the control vs. LC30 and LC40 in the content of protein. A significant decrease in glutathione S-transferase...
Effects of buprofezin and imidacloprid on the functional response of Eretmocerus mundus MercetOriginal Paper
Fariba Sohrabi, Parviz Shishehbor, Moosa Saber, Mohammad Said Mosaddegh
Plant Protect. Sci., 2014, 50(3):145-150 | DOI: 10.17221/64/2012-PPS
Eretmocerus mundus Mercet is one of the key natural enemies of Bemisia tabaci (Gennadius). In this study, the sublethal effects of LC25 of imidacloprid and field-recommended concentration of buprofezin on the functional response of E. mundus to different densities of second instar B. tabaci nymphs were evaluated. The results revealed a type III functional response in the control and imidacloprid treatment. The type III functional response was altered into a type II by buprofezin. Although imidacloprid did not alter the type of functional response of E. mundus compared to the control, it negatively...
Floral herbivory of an invasive slug on a native weedOriginal Paper
Alois Honěk, Zdenka Martinková
Plant Protect. Sci., 2014, 50(3):151-156 | DOI: 10.17221/75/2013-PPS
Effects of floral herbivory (grazing flowers) by slugs on production and quality of seeds of herbaceous plants have been rarely quantified. We studied consequences of grazing by an invasive slug Arion lusitanicus (Mabille) for inflorescences of dandelion (Taraxacum officinale Weber ex Wiggers). In May 2008, a grassy site in Prague-Ruzyně (Czech Republic) was densely populated by dandelion inflorescences. Of the 40% of the flowers grazed by the slug, 70% died before seed dispersal and seed was eaten from 10% of the closed mature inflorescences. Viability of seeds from inflorescences that survived slug grazing was...
Spread dynamics of Abutilon theophrasti in Central EuropeOriginal Paper
Swen Follak, Ulrike Aldrian, Michael Schwarz
Plant Protect. Sci., 2014, 50(3):157-163 | DOI: 10.17221/55/2013-PPS
The spread pattern of Abutilon theophrasti (velvetleaf) in Austria, the Czech Republic, and Slovakia was analysed based on an exhaustive distribution data set (389 records). Cumulative number of all records showed a continuous increase since its introduction in the 19th century and > 1970 its spread gained momentum with an exponential increase > 2000. In fields, the species remained rare until 2000. Since then, A. theophrasti has invaded fields much more frequently (78% of all records in fields > 2000) and it was mainly found in sugar beet and maize. Approximately a total of 188 000 ha of the agricultural area...