Template-Type: ReDIF-Article 1.0 Author-Name: Jitka Stará Author-Workplace-Name: Department of Entomology, Division of Plant Medicine, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Author-Name: František Kocourek Author-Workplace-Name: Department of Entomology, Division of Plant Medicine, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Title: Flight pattern of Archips podana (Lep.: Tortricidae) based on data from pheromone traps Abstract: In 9 years of the period 1993-1999 and 2001-2003 the flight activity of Archips podana was investigated by pheromone traps placed in four apple orchards in Central and East Bohemia. The cumulative catches of A. podana males were plotted against time of the catch expressed in sum of degree-days (DD) above 10°C and approximated by Richards' function. Common parameters of Richards' function could be found for the overwintering generation of A. podana from all localities. The beginning, peak and end of flight activity of the overwintering generation of the A. podana population in Central and East Bohemia can be predicted by use of DD. Archips podana is usually bivoltine in the Czech Republic, rarely univoltine in cold years or cold localities. Construct the flight pattern of the summer generation could of A. podana not be constructed, because the course of flight of this generation in dependence on DD differed significantly in particular years and localities. Keywords: Archips podana, fruit tree tortrix moth, apple orchards, flight activity, monitoring, pheromone traps, flight pattern, degree-days Journal: Plant Protection Science Pages: 75-81 Volume: 40 Issue: 3 Year: 2004 DOI: 10.17221/1466-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/1466-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200403-0001.txt Handle: RePEc:caa:jnlpps:v:40:y:2004:i:3:id:1466-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Ján Praslička Author-Workplace-Name: Faculty of Natural Sciences, Constantine the Philosopher University in Nitra, Slovak Republic Author-Name: Timotej Miština Author-Workplace-Name: Faculty of Natural Sciences, Constantine the Philosopher University in Nitra, Slovak Republic Title: Effects of different field managements on the abundance of cereal aphids (Sternorrhyncha: Aphidoidea). Abstract: The abundance of cereal aphids on winter wheat tillers and ears was determined in two field managements (integrated and ecological) at Dolná Malanta, Slovakia, over the years 1999-2001. The overall average number of aphids detected per tiller in the integrated field management was 22.73, while in the ecological management that number was 15.67; there were thus 31.06% more aphids in the integrated field management. The average number of aphids detected per ear in the integrated field management was 3.64, and in the ecological field management the number was 2.51; again, there were 31.04% more aphids in the integrated field management. Keywords: cereal aphids, winter wheat, field managements Journal: Plant Protection Science Pages: 82-86 Volume: 40 Issue: 3 Year: 2004 DOI: 10.17221/1465-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/1465-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200403-0002.txt Handle: RePEc:caa:jnlpps:v:40:y:2004:i:3:id:1465-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Miroslav Švec Author-Workplace-Name: Department of Genetics, Comenius University, Bratislava, Slovak Republic Author-Name: Marta Miklovičová Author-Workplace-Name: Department of Genetics, Comenius University, Bratislava, Slovak Republic Author-Name: Valéria Šudyová Author-Workplace-Name: Department of Genetics, Comenius University, Bratislava, Slovak Republic Author-Name: Martina Hudcovicová Author-Workplace-Name: Department of Genetics, Comenius University, Bratislava, Slovak Republic Author-Name: Pavol Hauptvogel Author-Workplace-Name: Department of Genetics, Comenius University, Bratislava, Slovak Republic Author-Name: Ján Kraic Author-Workplace-Name: Department of Genetics, Comenius University, Bratislava, Slovak Republic Title: Powdery mildew resistance in some Aegilops species Abstract: Resistance to powdery mildew (Blumeria graminis (DC.) E. O. Speer f.sp. tritici Em. Marchal) in Aegilops crassa Boiss., Ae. ventricosa Tausch, Ae. biuncialis Vis., Ae. triuncialis L. and Ae. cylindrica Host was tested at the stage of primary leaves in the years 2000 and 2001. All plants of Ae. ventricosa, Ae. biuncialis and sample No. 9 of Ae. cylindrica repeatedly showed a susceptible reaction after being inoculated by all powdery mildew isolates used. In contrast, plants of Ae. crassa, sample No. 8 of Ae. cylindrica and all samples (No. 13, 21, 22, 24 and 26) of Ae. triuncialis were resistant to all isolates. Samples No. 5, 6, 7, 19 and 23 of Ae. cylindrica contained resistant and susceptible plants in both years. Virulence to these samples ranged from 3% to 18%. Cluster analysis using DNA microsatellite markers showed that the accessions are arranged in groups based on taxonomic relationship but not on basis of resistance. Plants susceptible to powdery mildew at the juvenile stage showed satisfactory adult plant resistance. Keywords: Blumeria graminis DC f.sp. tritici, Aegilops spp., disease resistance, virulence analysis, DNA polymorphism, genetic resources Journal: Plant Protection Science Pages: 87-93 Volume: 40 Issue: 3 Year: 2004 DOI: 10.17221/1471-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/1471-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200403-0003.txt Handle: RePEc:caa:jnlpps:v:40:y:2004:i:3:id:1471-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Jaroslav Salava Author-Workplace-Name: Institute of Crop Production, Prague-Ruzyně, Czech Republic Author-Name: Daniela Chodová Author-Workplace-Name: Institute of Crop Production, Prague-Ruzyně, Czech Republic Author-Name: Kateřina Nováková Author-Workplace-Name: Institute of Crop Production, Prague-Ruzyně, Czech Republic Title: The emergence of a atrazine resistant black nightshade (Solanum nigrum L.) biotype and molecular basis of the resistance Abstract: Seeds from atrazine resistant plants of black nightshade (Solanum nigrum L.) were collected at the railway station Prague-Vršovice, seeds from susceptible plants in Vyšehořovice (Prague East district). Tests on emergence showed that in both resistant and susceptible biotypes it was highest at a seeding depth of 1 mm, and that at the same seeding depth there were statistically significant differences in emergence between the resistant and susceptible biotypes. The resistance or susceptibility to atrazine was tested by both a chlorophyll fluorescence assay and spraying with atrazine. A region of the gene encoding D1 protein of photosystem II was sequenced and compared between the resistant and susceptible biotypes. Resistance to atrazine in the S. nigrum biotype from Vršovice was conferred by a glycine for serine substitution at residue 264 of the D1 protein. In the plants of the biotypes there was excellent correspondence between the presence of the mutation and herbicide resistance. The assay based on restriction analysis of PCR products can be used for rapid detection of the mutation in populations of black nightshade. Keywords: black nightshade, Solanum nigrum L., resistance, atrazine, chlorophyll fluorescence, emergence, genetic variation Journal: Plant Protection Science Pages: 94-100 Volume: 40 Issue: 3 Year: 2004 DOI: 10.17221/1470-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/1470-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200403-0004.txt Handle: RePEc:caa:jnlpps:v:40:y:2004:i:3:id:1470-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Luděk Šindelář Author-Workplace-Name: Institute of Experimental Botany, Academy of Sciences of the Czech Republic, Prague, Czech Republic Author-Name: Milada Šindelářová Author-Workplace-Name: Institute of Experimental Botany, Academy of Sciences of the Czech Republic, Prague, Czech Republic Title: Regulation of metabolic pathways PVY-RNA biosynthesis in tobacco: glycolytic pathway Abstract: Tobacco plants infected with potato virus Y were studied at the stage of acute infection. Key enzymes of the glycolytic pathway, their regulation and the content of involved intermediates were monitored. The activities of the key enzymes of the glycolytic pathway (6-phosphofructokinase, fructosebisphosphatase and pyruvate kinase), determined in both crude homogenates and after partial purification, did not differ from the activities found in healthy control tissues. In virus-infected tissues the content of ATP was higher than in the healthy control. The levels of ADP and AMP decreased soon after inoculation, but increased at the end of the experimental period. The content of inorganic phosphate was not influenced by infection. No difference in adenylate energy charge was observed between healthy and virus-infected tissues. This implies that the rates of the glycolytic pathway in vivo are not altered during the acute stage of infection. Keywords: ATP, ADP, AMP, fructosebisphosphatase, Nicotiana tabacum L. cv. Samsun, 6-phosphofructokinase, pyruvate kinase Journal: Plant Protection Science Pages: 101-106 Volume: 40 Issue: 3 Year: 2004 DOI: 10.17221/991-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/991-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200403-0005.txt Handle: RePEc:caa:jnlpps:v:40:y:2004:i:3:id:991-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Václav Stejskal Author-Workplace-Name: Department of Stored-Product Pest Control, Division of Plant Medicine, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Author-Name: Zuzana Kučerová Author-Workplace-Name: Department of Stored-Product Pest Control, Division of Plant Medicine, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Author-Name: Jan Lukáš Author-Workplace-Name: Department of Stored-Product Pest Control, Division of Plant Medicine, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Title: Evidence and symptoms of pasta infestation by Sitophilus oryzae (Curculionidae; Coleoptera) in the Czech Republic Abstract: Heavy infestation of pasta by the internally feeding pest Sitophilus oryzae (Coleoptera: Curculionidae) was recorded for the first time under field conditions in the Czech Republic. Symptoms of hidden infestation (eggs, larvae, pupae and adults) and a comparison of optical methods to detect them are described for the use by farmers, plant health and phytoquarantine inspectors. Photo-documentation is included. Keywords: Sitophilus oryzae, pasta, symptoms of infestation, photo-documentation Journal: Plant Protection Science Pages: 107-111 Volume: 40 Issue: 3 Year: 2004 DOI: 10.17221/971-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/971-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200403-0006.txt Handle: RePEc:caa:jnlpps:v:40:y:2004:i:3:id:971-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Pavel Bartoš Title: Doc. Ing. Jozef Huszár, DrSc., is sixty - Biographical Notice Journal: Plant Protection Science Pages: 112 Volume: 40 Issue: 3 Year: 2004 DOI: 10.17221/490-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/490-PPS.html File-Format: text/html Handle: RePEc:caa:jnlpps:v:40:y:2004:i:3:id:490-PPS