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| Registros recuperados: 32 | |
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| Tamm, L.; Smit, B.; Hospers, M.; Jannsens, B.; Burma, J.; Mølgaard, J.P.; Lærke, P.E.; Hansen, H.H.; Bertrand, C.; Lambion, J.; Finckh, M.; Schüler, C.; Lammerts van Bueren, E.; Ruissen, T.; Solberg, S.; Speiser, B.; S., Philip; M., Wolfe; Leifert, C. |
| Problemstellung/Ziele Die Kraut- und Knollenfäule (Phytophthora infestans) ist die Krankheit, die im biologischen (aber auch konventionellen) Kartoffelanbau in Europa die größten Probleme verursacht. Unter günstigen klimatischen Bedingungen breitet sich die Krankheit sehr rasch aus und kann große Ertragsausfälle verursachen. Innerhalb von Europa variiert der durch P. infestans verursachte wirtschaftliche Schaden stark zwischen den Regionen. Dies hängt von verschiedenen Faktoren ab, aber in biologisch bewirtschafteten Anbausystemen immt man an, dass die klimatischen Bedingungen, die verwendeten Sorten sowie die agronomischen Maßnahmen wie Bodenbearbeitung oder die Verwendung von Pflanzenschutzmitteln eine wichtige Rolle spielen. Die Reduktion oder das... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Root crops Crop health; Quality; Protection. |
| Ano: 2003 |
URL: http://orgprints.org/1918/1/tamm%2Det%2Dal%2D2003%2Dbio%2Dartoffel%2Deuropa%2Dinventar.pdf |
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| Tamm, L.; Smit, A.B.; Hospers, M.; Janssens, S.R.M.; Buurma, J.S.; Molgaard, J.-P.; Laerke, P.E.; Hansen, H.H.; Hermans, A.; Boedker, L.; Bertrand, C.; Lambion, J.; Finckh, M.R.; Schüler, Chr.; Lammerts van Bueren, E.; Ruissen, T.; Nielsen, B.J.; Solberg, S.; Speiser, B.; Wolfe, M.S.; Phillips, S.; Wilcoxon, S.J.; Leifert, C.. |
| In Europe, late blight, caused by Phytophthora infestans, is the most devastating disease affecting organic (and conventional) potato production. Under suitable environmental conditions the disease can spread rapidly and it can cause complete crop loss. The extent of damage due to late blight depends on several factors: in organic production systems these factors include climate, choice of variety, soil management and use of crop protection agents such as copper. Therefore, the extent of economic damage varies between European regions. Council Regulation (EEC) No 2092/91, amended by Commission Regulation (EC) No 473/2002 of 15 March 2002 regulates the use of copper in organic agriculture. Copper has been the single most important control agent in... |
| Tipo: Book |
Palavras-chave: Crop health; Quality; Protection Root crops. |
| Ano: 2004 |
URL: http://orgprints.org/2936/1/tamm%2Det%2Dal%2D2004%2Dblight%2Dmop%2Doe.pdf |
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| Tamm, L.; Smit, A. B.; Hospers, M.; Janssens, S.R.M.; Buurma, J.S.; Molgaard, J.-P.; Laerke, P.E.; Hansen, H. H.; Hermans, A.; Bodker, L.; Bertand, C.; Lambion, J.; Finckh, M.R.; Schüler, Chr.; Lammerts van Bueren, E.; Ruissen, T.; Nielsen, B. J.; Solberg, S.; Speiser, B.; Wolfe, M. S.; Phillips, S.; Wilcoxon, S. J.; Leifert, C.. |
| In Europe, late blight, caused by Phytophthora infestans, is the most devastating disease affecting organic (and conventional) potato production. Under suitable environmental conditions the disease can spread rapidly and it can cause complete crop loss. The extent of damage due to late blight depends on several factors: in organic production systems these factors include climate, choice of variety, soil management and use of crop protection agents such as copper. Therefore, the extent of economic damage varies between European regions. This report presents the results of a detailed survey that has been conducted in 7 European countries in the year 2001: (i) statistics on yields, farm gate prices, and production techniques, (ii) an analysis offarmer... |
| Tipo: Report |
Palavras-chave: Farm economics; Root crops. |
| Ano: 2004 |
URL: http://orgprints.org/25358/1/1340-late-blight.pdf |
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| Tamm, L.; Rentsch, C.; Guyer, U.; E., Mösinger. |
| Der Ersatz von Kupfer und anderen Pestiziden ist eine der dringlichen Aufgaben der Forschung im biologischen Landbau. Beim direkten Pflanzenschutz stehen fungizid wirkende Substanzen, Biocontrol-Organismen und Pflanzenstärkungsmittel zur Diskussion. Das Konzept der Pflanzenstärkung ist seit langem im biologischen Landbau bekannt. Beispielsweise werden Kompostextrakte, Brennesselextrakte, aber auch kommerzialisierte Produkte aus Reynoutria sachalinensis oder Backpulver eingesetzt. Unter den Resistenzinduktoren (Elicitoren) sind vor allem diejenigen von grossem Interesse, die Resistenz gegen Pathogene auslösen, die ansonsten mit Kupfer bekämpft werden (Tamm, 2000). Der Dünger Agro Biosol (Biochemie GmbH, A-Kundl) weist nebst einer Düngerwirkung auch... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2003 |
URL: http://orgprints.org/1016/1/tamm%2Dl%2Dpenicillium%2Dextrakt%2D2003.pdf |
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| Thürig, B.; Schärer, H.-J.; Ludwig, M.; James, E. E.; Langat, M. K.; Mulholland, D. A.; Kleeberg, I.; Tamm, L.. |
| Extracts from European Larch (Larix decidua) were shown to be efficient to control grapevine downy mildew (Plasmopara viticola) under controlled and field conditions. Larixyl acetate and larixol were identified as the active compounds. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Viticulture. |
| Ano: 2018 |
URL: http://orgprints.org/34881/1/Poster_NBFF_Larixyne_Thuerig_2018_ohne_Schnittmarken.pdf |
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| Fuchs, J. G.; Hedrich, T.; Hofer, V.; Koller, M.; Oberhaensli, T.; Ribera Regal, J.; Tamm, L.; Thuerig, B.; Schwarze, F.W.M.R.; Herforth-Rahmé, J.. |
| Vigorous seedlings are an important base for vegetable production. Beside the availability of appropriate amounts of nutrients, the health of seedlings is decisive. Soil-borne diseases are a challenging problem in organic seedling production. Here, we present results on the development of disease-suppressive growing media. Three aspects were examined: (i) use of different components of growing media (peat, coconut fiber, wood fiber, compost), (ii) influence of selected organic nitrogen fertilizers and (iii) use of different microorganisms (including commercial biocontrol agents (BCA)). Three plant-pathogen systems were used in this study: cucumber-Pythium ultimum, cress-Pythium ultimum and basil-Rhizoctonia solani. Green waste compost showed a good... |
| Tipo: Journal paper |
Palavras-chave: Composting and manuring Crop health; Quality; Protection. |
| Ano: 2017 |
URL: http://orgprints.org/33020/1/fuchs_etal_2017_actaHortic_Vol1164_p181-188.pdf |
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| Weibel, F.P.; Daniel, C.; Tamm, L.; Willer, H.; Schwartau, H.. |
| Europe is both a leading world market for and world producer of organic food. Growth of organically managed land and of domestic market values was strong in the past and continued during the financial recession, although at a slower rate. Many countries have specific plans for priority organic research and investment. Europe is a major producer of organic fruit crops, including a total of more than 900,000 ha consisting of 367,000 ha of olives, 92,700 ha of grapes, 187,000 ha of nuts, 94,800 ha of temperate fruit, 26,096 ha of berries, 31,800 ha of citrus, and 11,000 ha of subtropical fruit (2010). Western Europe added 4,000 ha of organic apples (Malus ×domestica) in 2010 and 2011 due to growth of the organic fruit market, a decline in conventional fruit... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Markets and trade; Fruit and berries. |
| Ano: 2013 |
URL: http://orgprints.org/23575/1/OrganicFruitEurope_WeibelEtal_2013.pdf |
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| Tamm, L.; Koepke, U.; Cohen, Y.; Leifert, C.. |
| The overall aims of organic and low input crop production include the economically viable and environmentally sound production of high quality food and feed. Technological bottlenecks in such systems include insufficient and instable yields and in some instances unsatisfactory processing, sensory and/or nutritional quality of the final product. Recently, concerns have also been raised that the intensive use of manures may lead to increased risk for contamination of food by enteropathogenic micro-organisms. Crop production in low input systems is based on key pillars, i.e. (i) a fertile soil which provides sufficient capacity to allow for plant growth while preventing soil-borne diseases, (ii) high quality, disease-free seeds and plant material, (iii) a... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover Food security; Food quality and human health. |
| Ano: 2007 |
URL: http://orgprints.org/10626/1/Tamm%2Detal%2D2007%2Dcrop_production_system.pdf |
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| Kasselaki, A. M.; Goumas, D.; Tamm, L.; Fuchs, J.; Cooper, J.; Leifert, C.. |
| Currently there is a lack of effective seed treatments for bacterial pathogens, with Cu-based compounds (the only chemical treatments permitted under organic farming standards) only providing partial control. The aim of this study was to quantify the effect of alternative treatments for the control of bacterial canker (Clavibacter michiganensis subsp. michiganensis), a major seed-borne bacterial disease in tomato. Treatments assessed were acidified nitrite (a treatment previously shown to control the seed-borne fungal disease Didymella lycopersici), antagonistic strains of Bacillus spp. and compost extracts, which were not previously evaluated as treatments for seed-borne diseases. Efficacy of treatments was determined in a seed disinfection assay.... |
| Tipo: Journal paper |
Palavras-chave: Vegetables Crop health; Quality; Protection. |
| Ano: 2011 |
URL: http://orgprints.org/19610/1/kasselaki%2Detal%2D2011%2Dclavibacter%2DNJAS.pdf |
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| Fuchs, J. G.; Fliessbach, A.; Mäder, Paul; Weibel, F.P.; Tamm, L.; Mayer, J.; Schleiss, K.. |
| To evaluate the influence of compost on soil fertility and plant growth, several medium term and long term field experiments with composts were conducted in different crops. In two maize experiments, one in a sandy and one in a loamy soil, the influence of different composts and digestates on soil parameters and plant growth were investigated. All products increased pH of the soil and improved the biological soil activity (e.g., enzymatic activities). Immature compost immobilized nitrogen and reduced plant growth. Organic nitrogen fertilizer added during cultivation, could compensate the growth depression. A full factorial experiment in a 2-years-old organic apple orchard was conducted from 2001-2007. The factors tested in all 9 possible combinations... |
| Tipo: Journal paper |
Palavras-chave: Soil quality; Composting and manuring; Fruit and berries. |
| Ano: 2014 |
URL: http://orgprints.org/36387/1/fuchs-etal-2014-ActaHort-1018-p39-46.pdf |
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| Tamm, L.; Fuchs, J.G.; Böger, N.; Mühletaler, L.; Amsler, A.; Levite, D.; Häseli, A.. |
| In der Schweiz stehen für die Bekämpfung von P. viticola Kupfer und Tonerdeprodukte wie Myco-San, Myco-Sin, und Ulmasud zur Verfügung. Die Praxis hat das Wirkungspotential gezeigt und es werden verschiedene Anwendungsstrategien angewandt. Der Einsatz von Tonerdeprodukten kann allerdings auch zu Phytotoxizität führen, die von der Anwendungsstrategie, Konzentration und Sorte abhängt. In dieser Studie (i) verglich das FiBL verschiedene Anwendungsstrategien mit und ohne Kupfer, (ii) untersuchte das aktive Prinzip und die Wirkungsweise der Tonerdeprodukte, und (iii) beschrieb den Einfluss von Umeltfaktoren wie Niederschlag auf die Wirkung. Die FiBL-Erfahrungen zeigen, dass Tonerdeprodukte wertvolle Kupferersatzprodukte sind in Situationen mit mittleren... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Viticulture. |
| Ano: 2004 |
URL: http://orgprints.org/2907/1/tamm%2Det%2Dal%2D2004%2Dintervitis.pdf |
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| Speiser, B.; Blake, F.; Micheloni, C.; Stopes, C.; Andersen, M.; Baker, B.; Bywater, S.; Canali, S.; Eriksen, R. Ø.; Gonzalvez, V.; Hozzank, A.; Jespersen, L. M.; Jørgensen, L. N.; Kelderer, M.; Kleeberg, H.; Koopmans, C.; Kromp, B.; Manstretta, M.; Maurer da Costa, A.; Monnier, MC.; Pauler, A.; Schmid, O.; Schreyer, A.; Slabe, A.; Tamm, L.; Trapman, M.; von Fragstein, P.. |
| This volume contains proposals for criteria for evaluation of plant protection products, fertilisers and soil conditioners1 to be used in organic agriculture. These ideas were developed in the course of the European Union (EU) Concerted Action project ‘ORGANIC INPUTS EVALUATION’ (QLK5-CT-2002-02565). For more information on this project see the end of this volume or visit the project website www.organicinputs.org. The documents in this volume are proposals elaborated by the project consortium and external experts. They were discussed with a broader audience at a public conference held in Brussels on October 13, 2005, and have been amended accordingly. Our proposals also include a “criteria matrix”, which is in Microsoft Excel format, and therefore stands... |
| Tipo: Report |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2005 |
URL: http://orgprints.org/8551/1/Speiser_etal_2005%2Da%2Dnew%2Dsystem_finalreport.pdf |
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| Speiser, B.; Tamm, L.; Schmid, O.. |
| Organic farmers may only use those plant protection products which are listed in Annex II B of the ‘Organic Regulation’ 2092/91 and also registered for use at national level. At present, new compounds may only be listed in Reg. 2092/91, if they do not come into direct contact with the crop (although in perennial crops, contact outside the growing season of the edible parts is possible), which is a major obstacle for progress. The EU-funded ORGANIC INPUTS EVALUATION project aims at making Reg. 2092/91 more flexible with regard to new products, while safeguarding the principles of organic farming. Registra-tion under the ‘Pesticide Directive’ 91/414 represents a considerable financial hurdle. The REBECA project will propose registration requirements which... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2006 |
URL: http://orgprints.org/7637/1/Speiser_Tamm_Schmid_2006.pdf |
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| Speiser, B.; Tamm, L.; Bale, J.; Fjelsted, A.; Hokkanen, H.; Menzler-Hokkanen, I.; Kuhlmann, U.; Strasser, H.; Hauschild, R.; Strauch, O.; Ehlers, R.U.. |
| The legal regulation of plant protection products (Dir. 91/414/ EEC) is a bottleneck in the market introduction of new microbial biocontrol agents, plant extracts and pheromones. In contrast, invertebrate biocontrol agents (“beneficials”) are not registered at EU level. The EU-funded project REBECA suggested improvements to accelerate the regulation process and make it more cost-effective, without compromises to the level of safety. Representatives of all stakeholder groups participated in the REBECA workshops. The EU Commission and Member States are encouraged to improve the registration of biocontrol organisms, plant extracts and semiochemicals at EU and/or national level. The full proposals can be found at www.rebeca-net.de. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2008 |
URL: http://orgprints.org/11518/1/speiser%2Detal%2D2008%2Disofar2008%2DPoster%2DRebeca.pdf |
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| Flier, W. G.; Kroon, L. P. N. M.; Hermansen, A.; van Raaij, H. M. G.; Speiser, B.; Tamm, L.; Fuchs, J. G.; Lambion, J.; Razzaghian, J.; Andrivon, D.; Wilcockson, S.; Leifert, C.. |
| Genetic variation and pathogenicity of Phytophthora infestans isolates collected from organic potato crops of the susceptible cv. Bintje and the moderately resistant cv. Santé were assessed in France, Norway, and the United Kingdom in 2001 and in Switzerland in 2001 and 2002. Population structures differed considerably between the four P. infestans populations. Those from France, Switzerland and the UK were mainly clonal populations showing restricted levels of genetic diversity, whilst those from Norway were mixed A1 and A2 mating type populations with high levels of genetic diversity, suggesting periodical sexual reproduction. Isolates collected from cv. Bintje were on average more aggressive than or comparable to isolates from cv. Santé. Race complexity... |
| Tipo: Journal paper |
Palavras-chave: Crop health; Quality; Protection Root crops. |
| Ano: 2007 |
URL: http://orgprints.org/11106/1/speiser%2Detal%2D2007%2Dplant_pathology_56.pdf |
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| Toenshoff, E. R.; Brunner, H.; Tamm, L.; Schärer, H.-J.; Oberhänsli, T.. |
| Candidatus Orchards of 30 to >100 years old fruit trees used for cider production are endangered by an accumulation of abiotic and biotic stress factors. Among biotic stress factors, diseases such as pear decline (PD) caused by the bacterial pathogen ' Phytoplasma ' contributes to a weakening and reduced life time of affected trees. Since direct treatment of this disease is not possible, approaches have gained attention, which might lead to an increased resilience against this pathogen, such as incisions of the cambium at the graft union at the stem base. Six 35 years old pear trees () of a Swiss cider production orchard, all affected by mild decline were chosen for this study. Four out of them were treated with 2-4 incisions per tree in February 2016.... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Fruit and berries Breeding; Genetics and propagation Crop health; Quality; Protection. |
| Ano: 2018 |
URL: http://orgprints.org/34874/1/Toenshoffetal-2018-ECOFruitConference2018-Proceeding-p43-49.pdf |
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| Speiser, B.; Tamm, L.; Amsler, T.; Lambion, J.; Bertrand, C.; Hermansen, A.; Ruissen, M. A.; Haaland, P.; Zarb, J.; Santos, J.; Shotton, P.; Wilcockson, S.; Juntharathep, P.; Ghorbani, R.; Leifert, C.. |
| Late blight of potatoes, caused by Phytophthora infestans, is particularly difficult to prevent or control in organic agriculture. In this study, the host resistance of selected varieties to foliar and tuber blight and their yield under organic growing conditions were assessed in trials carried out in four countries (Switzerland, France, England and Norway) in 2001 and 2002. The objective was to identify new, more resistant varieties which might replace some of the more susceptible varieties which are currently grown in organic agriculture. In each country, five test varieties were compared with two reference varieties, identical for all sites, and with two locally popular varieties. In addition, the effect of copper fungicides was assessed for all... |
| Tipo: Journal paper |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2006 |
URL: http://orgprints.org/8358/1/Speiser_etal_2006_late_blight.pdf |
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| Registros recuperados: 32 | |
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