Template-Type: ReDIF-Article 1.0 Author-Name: Iveta Pánková Author-Workplace-Name: Division of Plant Medicine - Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Author-Name: Blanka Kokošková Author-Workplace-Name: Division of Plant Medicine - Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Title: Sensitivity and specificity of monoclonal antibody Mn-Cs1 for detection and determination of Clavibacter michiganensis subsp. sepedonicus, the causal agent of bacterial ring rot of potato Keywords: bacterial ring rot of potato, Clavibacter michiganensis subsp. sepedonicus, DAS-ELISA Journal: Plant Protection Science Pages: 117-124 Volume: 38 Issue: 4 Year: 2002 DOI: 10.17221/4866-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/4866-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200204-0001.txt Handle: RePEc:caa:jnlpps:v:38:y:2002:i:4:id:4866-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Jiří Svoboda Author-Workplace-Name: Division of Plant Medicine - Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Author-Name: Jaroslav Polák Author-Workplace-Name: Division of Plant Medicine - Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Title: Distribution, variabiality and overwintering of Zucchini yellow mosaic virus in the Czech Republic Abstract: The incidence of Zucchini yellow mosaic virus (ZYMV) was monitored in the south Moravian region of the Czech Republic during 1997-2001. Crops of gherkin, squash, zucchini and cucumbers were found infected with ZYMV, manifested by symptoms of severe stunting and yellowing with deformed leaves and fruits. Twenty to eighty percent of infected plants were recorded. Six isolates of ZYMV from four localities were differentiated on indicator plants; three of them were maintained as being typical for differences in pathogenicity. Overwintered weed species were tested for the presence of the virus. ZYMV was detected by ELISA in one plant of Tripleurospermum maritimum out of 46 tested, and in two plants of Stellaria media out of 29 tested in 2001. Such tests were repeated in 2002, and ZYMV was detected in three plants of T. maritimum out of 45 tested, in three plants of S. media out of 52, and in two plants of Trifolium repens out of 17 tested. The virus was successfully transmitted from T. maritimum, S. media and T. repens to indicator plants of Cucurbita pepo convar. giromontiina. Back-transmission of ZYMV was proved by ELISA, electron microscopy and symptoms. T. maritimum was found to be a new natural host of ZYMV. Keywords: ZYMV, incidence, vegetables, weeds, virus reservoirs, differentiation of strains Journal: Plant Protection Science Pages: 125-130 Volume: 38 Issue: 4 Year: 2002 DOI: 10.17221/4867-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/4867-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200204-0002.txt Handle: RePEc:caa:jnlpps:v:38:y:2002:i:4:id:4867-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Jiří Kindl Author-Workplace-Name: Prague, Czech Republic Author-Name: Blanka Kalinová Author-Workplace-Name: Prague, Czech Republic Author-Name: Jona Freise Author-Workplace-Name: Prague, Czech Republic Author-Name: Werner Heitland Author-Workplace-Name: Prague, Czech Republic Author-Name: Sylvie Augustin Author-Workplace-Name: Prague, Czech Republic Author-Name: Sylvan Guichard Author-Workplace-Name: Prague, Czech Republic Author-Name: Nikos Avtzis Author-Workplace-Name: Prague, Czech Republic Author-Name: Aleš Svatoš Author-Workplace-Name: Prague, Czech Republic Title: Monitoring the population dynamics of the horse chestnut leafminer Cameraria ohridella with a synthetic pheromone in Europe Abstract: A monitoring system for Cameraria ohridella males based on a synthetic sex pheromone was tested in the Czech Republic, Germany, France and Greece. From the obtained data on the insect phenology we concluded that in Central Europe C. ohridella typically has three generations per year. The pheromone monitoring can be used to detect the pest when it appears in uninfested areas and is also suitable to determine population densities. Keywords: horse chestnut leafminer, Cameraria ohridella, Lepidoptera, Gracillariidae, female sex pheromone traps, monitoring, population density Journal: Plant Protection Science Pages: 131-138 Volume: 38 Issue: 4 Year: 2002 DOI: 10.17221/4868-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/4868-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200204-0003.txt Handle: RePEc:caa:jnlpps:v:38:y:2002:i:4:id:4868-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Josef Šedivý Author-Workplace-Name: 2 JOSEF ŠEDIVÝ and JAN VAŠÁK Author-Name: Jan Vašák Author-Workplace-Name: 2 JOSEF ŠEDIVÝ and JAN VAŠÁK Title: Differences in flight activity of pests on winter and spring oilseed rape Abstract: For 6 years the flight activity of pests on winter and spring oilseed rape was studied from spring till harvest, using yellow traps. In all years the flight intensity was higher in winter rape than in spring rape. The dominant insect pests of winter oilseed rape were Ceutorhynchus obstrictus, C. napi, C. pallidactylus, Dasineura brassicae, Meligethes aeneus, Phyllotreta atra and Ph. nigripes; subdominant were Athalia rosae, Brevicoryne brassicae and Psylliodes chrysocephala. In spring rape the dominant species were Brevicoryne brassicae, Ceutorhynchus obstrictus, Dasineura brassicae, Meligethes aeneus, Phyllotreta atra and Ph. nigripes; subdominant were Athalia rosae, Ceutorhynchus napi, C. pallidactylus and Psylliodes chrysocephala. Dasineura brassicae was not evaluated from trap catches. The damage by D. brassicae is higher to pods on axillary branches than on the main inflorescence. The occurrence of pests on spring rape was tied to a unsuitable phenophase of the plants at the time of flight activity and to the suitability of food. Winter rape requires a higher intensity of chemical treatment against pests than spring rape. Keywords: winter oilseed rape, spring oilseed rape, pests, yellow trap, flight activity, variability Journal: Plant Protection Science Pages: 139-144 Volume: 38 Issue: 4 Year: 2002 DOI: 10.17221/4869-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/4869-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200204-0004.txt Handle: RePEc:caa:jnlpps:v:38:y:2002:i:4:id:4869-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Pavel Lauterer Author-Workplace-Name: Entomological Department - Moravian Museum, Brno-Slatina, Czech Republic Title: Citrus flatid planthopper - Metcalfa pruinosa (Hemiptera: Flatidae), a new pest of ornamental horticulture in the Czech Republic Abstract: In late August of 2001 a population of Metcalfa pruinosa (Say, 1830) consisting of several dozens of adults and larvae was observed in a nursery of ornamentals at Brno-Bystrc. The species occurred mostly on young twigs of cultivars of Thuja occidentalis L., Juniperus communis L. and Sorbus aucuparia L. but also Lilium spp. and singly on other various wood and herbal ornamental plants. The damage was rather of an aesthetic kind: young twigs were covered by 5-10 cm long spots of waxy fluff produced by the larvae. The pest is native to North America and was introduced in the late 1970's to Italy, from where it spread to southern France, Slovenia and southern Austria. The Brno population might have been imported, in the egg stage, on ornamental shrubs from Italy. The polyphagous pest is very common in Southern Europe, causing damage especially on fruit trees by the secretion of honeydew that, being colonised by Capnodiaceae moulds, inhibits the transpiration. The species could stay permanently in theCzechRepublic or could be repeatedly imported again. Keywords: citrus flatid planthopper, Metcalfa pruinosa, ornamental horticulture, first record, Czech Republic Journal: Plant Protection Science Pages: 145-148 Volume: 38 Issue: 4 Year: 2002 DOI: 10.17221/4870-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/4870-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200204-0005.txt Handle: RePEc:caa:jnlpps:v:38:y:2002:i:4:id:4870-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Jindra Štolcová Author-Workplace-Name: Division of Plant Medicine - Research Institute of Crop Production, Prague-Ruzynì, Czech Republic Title: Secondary succession on an early abandoned field: vegetation composition and production of biomass Abstract: During 1996-2000 the secondary succession on a field left fallow was investigated. The experimental area was divided into a ploughed and an unploughed part. Both parts were divided into 5 × 5 m plots that were either left intact (control), mowed in June or July, or superficially cultivated in June. The position of the plots was identical each year. In successive years total dry matter production decreased in all experimental plots; in unploughed plots more than in ploughed ones. The spread of Cirsium arvense (L.) Scop. was increased by ploughing and superficial cultivation. Ploughing stimulated the spread of perennial dicotyledonous plants more than mowing in June and July. Superficial cultivation increased the spread of perennial dicotyledonous plants in the first years. Later on the proportion of perennial dicotyledonous plants decreased and after 5 years the plots were dominated by Anisantha sterilis (L.) Nevski. The incidence of Elytrigia repens (L.) Desv. was highest in the 5th year on unploughed control plots. The spread of perennial monocotyledonous plants was lowest in ploughed and superficially cultivated plots. Keywords: fallow-field, ploughing, weeds, biomass, monocotyledonous plants, dicotyledonous plants, perennial, annual, secondary succession Journal: Plant Protection Science Pages: 149-154 Volume: 38 Issue: 4 Year: 2002 DOI: 10.17221/4871-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/4871-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200204-0006.txt Handle: RePEc:caa:jnlpps:v:38:y:2002:i:4:id:4871-PPS Template-Type: ReDIF-Article 1.0 Author-Name: J. Polák Title: RNDr. Zdenko Polák, CSc. - 70 years - Biographical Notice Journal: Plant Protection Science Pages: 155-156 Volume: 38 Issue: 4 Year: 2002 DOI: 10.17221/4872-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/4872-PPS.html File-Format: text/html Handle: RePEc:caa:jnlpps:v:38:y:2002:i:4:id:4872-PPS