Template-Type: ReDIF-Article 1.0 Author-Name: Lenka Širlová Author-Workplace-Name: Department of Virology, Division of Plant Medicine, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Author-Name: Josef Vacke Author-Workplace-Name: Department of Virology, Division of Plant Medicine, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Author-Name: Michala Chaloupková Author-Workplace-Name: Department of Virology, Division of Plant Medicine, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Title: Reaction of selected winter wheat varieties to autumnal infection with Wheat dwarf virus Abstract: The response of 25 registered winter wheat varieties to autumnal infection with Wheat dwarf virus (WDV) was studied in small plot trials in two years. The materials were infected by vectors, leafhopper Psammotettix alienus Dahlbom, 1851 from three-leaf stage to tillering. The symptoms expression was monitored in spring and plant height, weight of above ground biomass and grain yield were observed in summer. All tested varieties were evaluated as susceptible and divided into three groups: varieties Banquet and Svitava with 87.3-93.1% grain yield reduction as moderately susceptible, varieties Clever, Drifter, Niagara and Rialto with 95.6-97.68% grain yield reduction as susceptible and varieties Apache, Batis, Bill, Complet, Contra, Corsaire, Ludwig, Mladka, Nela, Record, Rheia, Semper, Sepstra, Solara, Sulamit, Tower, Trend, Vlasta and Winsdor with 99.7-100% grain yield reduction as very susceptible. Statistically significant differences were observed between moderately susceptible and susceptible varieties as well as very susceptible ones in absorbency values by means of DAS-ELISA. Keywords: Wheat dwarf virus (WDV), winter wheat, resistance Journal: Plant Protection Science Pages: 1-7 Volume: 41 Issue: 1 Year: 2005 DOI: 10.17221/2732-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/2732-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200501-0001.txt Handle: RePEc:caa:jnlpps:v:41:y:2005:i:1:id:2732-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Kamil Karut Author-Workplace-Name: Department of Plant Protection, Agricultural Faculty, Çukurova University, Adana, Turkey Author-Name: Chang-Chi Chu Author-Workplace-Name: USDA-ARS, Western Cotton Research Laboratory, Phoenix, Arizona, USA Author-Name: Thomas J. Henneberry Author-Workplace-Name: USDA-ARS, Western Cotton Research Laboratory, Phoenix, Arizona, USA Author-Name: Cengiz Kazak Author-Workplace-Name: Department of Plant Protection, Agricultural Faculty, Çukurova University, Adana, Turkey Title: Determination of seasonal activity of the sweetpotato whitefly (Homoptera: Aleyrodidae) and leafhoppers (Homoptera: Cicadellidae) by plastic cup traps on the Çukurova Plain, Turkey. Abstract: The flight activities of adult sweetpotato whitefly, Bemisia tabaci, and leafhoppers were monitored by plastic cup traps at Boğali, Taşçi, Haciali, Doğankent and Balcali in the Çukurova Plain, Turkey, in 2001 and 2003. Activity of B. tabaci, expressed as numbers of adults caught in traps, was low from May to early July in both years. Numbers of B. tabaci caught at Tasçi were higher than at Boğali from 10 July and 21 August in 2001. Its numbers were also higher at Doğankent than at Haciali and Balcali during August of 2003. The numbers of leafhopper adults caught fluctuated greatly in both years. Numbers remained low until late June, followed by gradual increases in July and August at Boğali and Taşçi in 2001. In contrast, numbers of adults caught were higher at Haciali, Doğankent and Balcali from May through July in 2003, followed by lower catches during the remainder of the season. Daily minimum temperatures in July and August were positively correlated with higher trap catches of both B. tabaci and leafhoppers. Keywords: sweetpotato whitefly, leafhoppers, seasonal activity, Turkey Journal: Plant Protection Science Pages: 8-13 Volume: 41 Issue: 1 Year: 2005 DOI: 10.17221/2735-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/2735-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200501-0002.txt Handle: RePEc:caa:jnlpps:v:41:y:2005:i:1:id:2735-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Alphonsus Mbonu Oparaeke Author-Workplace-Name: Department of Crop Protection, Institute for Agricultural Research, Ahmadu Bello University, Samaru-Zaria, Nigeria Author-Name: Michael Chidozie Dike Author-Workplace-Name: Department of Crop Protection, Institute for Agricultural Research, Ahmadu Bello University, Samaru-Zaria, Nigeria Author-Name: Christopher Iheanyi Amatobi Author-Workplace-Name: Department of Crop Protection, Institute for Agricultural Research, Ahmadu Bello University, Samaru-Zaria, Nigeria Title: Field evaluation of extracts of five Nigerian spices for control of post-flowering insect pests of cowpea, Vigna unguiculata (L.) Walp. Abstract: The insecticidal efficacy of aqueous extracts of five Nigerian spices (Piper guineense Schum and Thonn., Aframomum melegueta (Roscoe), Xylopia aethiopica (Dunal) A. Rich., Zingiber officinale L. and Capsicum annuum L.) was tested in a field study for the control of two important post-flowering insect pests, Maruca vitrata Fab. (Lepidoptera: Pyralidae) and Clavigralla tomentosicollis Stal. (Hemiptera: Coreidae) of cowpea. The extracts were applied at 10% (w/v) and sprayed every week for 4 weeks. P. guineense, followed by A. melegueta, significantly reduced (P < 0.01) abundance of the pests and decreased the damage to cowpea pods. Grain yields were significantly higher in plots treated with P. guineense and A. melegueta extracts compared to plots treated with other extracts. This technology is cheap, safe, environmentally friendly and easy to adopt by limited resource farmers in third world countries. Keywords: spices, extracts, Maruca vitrata, Clavigralla tomentosicollis, control, cowpea Journal: Plant Protection Science Pages: 14-20 Volume: 41 Issue: 1 Year: 2005 DOI: 10.17221/2737-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/2737-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200501-0003.txt Handle: RePEc:caa:jnlpps:v:41:y:2005:i:1:id:2737-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Jindra Štolcová Author-Workplace-Name: Department of Entomology, Division of Plant Medicine, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Title: Insect injury and mortality of seedlings of field penny-cress (Thlaspi arvense L.). Abstract: During 1997-1999 the injury caused by insect herbivors and mortality of plants of field penny-cress (Thlaspi arvense L.) was studied on an early fallow field at Prague-Ruzyně. The highest abundance of the weed (102 plants per m2) was recorded in 1999, the lowest (27 plants/m2) in 1998. Nearly all plants (100% in 1997 and 1998, 94% in 1999) were injured by flea beetles (Phyllotreta spp.). Injury was greatest (> 50%) in younger seedlings. Mortality was low in 1997 (17.1%) and 1999 (15.8%), but high in 1998 (94%) because of concurrent drought. Herbivory and drought may kill a large proportion of seedlings and thus change the composition of the weed community. Keywords: field penny-cress, Thlaspi arvense L., phytophagous insect, flea beetle, Phyllotreta spp., herbivory, mortality, fallow, secondary succession Journal: Plant Protection Science Pages: 21-26 Volume: 41 Issue: 1 Year: 2005 DOI: 10.17221/2736-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/2736-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200501-0004.txt Handle: RePEc:caa:jnlpps:v:41:y:2005:i:1:id:2736-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Václav Kůdela Author-Workplace-Name: Department of Bacteriology, Division of Plant Medicine, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Author-Name: Václav Krejzar Author-Workplace-Name: Department of Bacteriology, Division of Plant Medicine, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Title: Occurrence of fruit doubles in the 2004 season associated with heat and drought stress in previous year - New and Unusual Report Abstract: A higher than normal incidence of fruit doubles occurred in the Czech Republic in the 2004 season. Fruit doubles or twinning was most frequently observed among plum fruits sold in town markets, in mirabelle in small gardens in Prague and environs, and in apple, variety James Grieve, on the experimental plots of the Research Institute of Crop Production, Prague-Ruzyně. In other cases, only the terminal fruits were fully developed, usually in one apple spur, while basal fruits were retarded. Based on meteorological data and literature reports, it can be concluded that the higher incidence of fruit doubles in the CR in 2004 is correlated with heat and drought stress in 2003. The period between August 3 and August 15, 2003, was the time during which differentiating and developing flower buds might have been stressed and injured. In this period, there were high temperatures (30 to 38.9°C) each day and trees suffered water stress. Keywords: environmental disorder, fruit doubles, Prunus domestica L., Prunus insititia convar. syriaca, Malus domestica L., Czech Republic Journal: Plant Protection Science Pages: 27-32 Volume: 41 Issue: 1 Year: 2005 DOI: 10.17221/2734-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/2734-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200501-0005.txt Handle: RePEc:caa:jnlpps:v:41:y:2005:i:1:id:2734-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Václav Kůdela Author-Workplace-Name: Production, Prague-Ruzyně, Czech Republic Author-Name: Ivana Šafránková Author-Workplace-Name: Faculty of Agriculture, Mendel University of Agriculture and Forestry Brno, Czech Republic Author-Name: Václav Krejzar Author-Workplace-Name: Production, Prague-Ruzyně, Czech Republic Author-Name: Josef Korba Author-Workplace-Name: Production, Prague-Ruzyně, Czech Republic Title: First report of Pseudomonas savastanoi pv. nerii on oleander in the Czech Republic Abstract: The bacterium Pseudomonas savastanoi pv. nerii was identified as the causal agent of parenchymatous galls on leaves of potted oleander plants grown at Brno, Moravia, in 2004. The plants had originated from cuttings made from firm shoots of a supposedly asymptomatic plant grown in and introduced from the Mediterranean region. The Biolog GN microplate system was used to identify the isolated bacterial strains. Successful inoculation of Nerium oleander seedlings proved the pathogenicity of the isolates. This is the first record of P. savastanoi pv. nerii in the Czech Republic. : Keywords: bacterial knot of oleander, Pseudomonas savastanoi pv. nerii, Nerium oleander, Czech Republic Journal: Plant Protection Science Pages: 33-37 Volume: 41 Issue: 1 Year: 2005 DOI: 10.17221/2733-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/2733-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200501-0006.txt Handle: RePEc:caa:jnlpps:v:41:y:2005:i:1:id:2733-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Pavel Špryňar Author-Workplace-Name: Department of Botany, Faculty of Science, Charles University, Prague, Czech Republic Title: First records of the rhododendron leafhopper (Graphocephala fennahi) (Hemiptera: Auchenorrhyncha: Cicadellidae) from the Czech Republic Abstract: In summer and autumn of 2004 the cicadellid leafhopper species Graphocephala fennahi was detected in the Czech Republic for the first time as a new alien insect species feeding on Rhododendron. The species is native to North America and was introduced in the 1930's to Great Britain and in the 1970's to continental Europe, where its invasion and relationship to the rhododendron bud blast disease have been studied in detail. At present, the Czech populations of G. fennahi appear to be restricted to the Prague city area and near surroundings, but further spread of G. fennahi can be expected. Keywords: Homoptera, insect invasions, ornamental horticulture, plant-animal interactions Journal: Plant Protection Science Pages: 38-41 Volume: 41 Issue: 1 Year: 2005 DOI: 10.17221/2731-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/2731-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200501-0007.txt Handle: RePEc:caa:jnlpps:v:41:y:2005:i:1:id:2731-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: Jiří Háva Author-Workplace-Name: Private Entomological Laboratory and Collection, Prague, Czech Republic Title: Trogoderma longisetosum and Trogoderma variabile (Coleoptera, Dermestidae) as two new stored product pests for the Czech Republic Abstract: A revision of material from the stored product pest collection of the Research Institute of Crop Production, Prague, was carried out. While so far five species of Trogoderma (all synanthropic) have been known from the Czech Republic, the revision revealed two new species and two new stored product pests for the Czech Republic: T. longisetosum and T. variabile. A key to determine T. longisetosum and T. glabrum is given. Faunistic records of the former quarantine species T. granarium are listed. Keywords: faunistics, Coleoptera, Dermestidae, Trogoderma, determination key, Czech Republic Journal: Plant Protection Science Pages: 42-45 Volume: 41 Issue: 1 Year: 2005 DOI: 10.17221/2738-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/2738-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200501-0008.txt Handle: RePEc:caa:jnlpps:v:41:y:2005:i:1:id:2738-PPS