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| Registros recuperados: 816 | |
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| Thomsen, M.G.; Brandsæter, L.O.; Mangerud, K.; Riley, H.. |
| Timing, type and duration of tillage operations and cropping practices are of importance for reducing the regeneration of perennial weeds and also for minimizing the environmental impacts of such operations. In the present work and with reference to previous publications we find that, based on the knowledge gained on growth patterns, sensitivity to competition, growth potential of roots and mechanical and management measures it is possible to coordinate control of perennial weeds with considerations of yield and reduced environmental impact. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil tillage; Weed management. |
| Ano: 2013 |
URL: http://orgprints.org/24523/1/24523.pdf |
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| Hatcher, Lecturer Paul; Melander, Senior scientist Bo. |
| Physical, cultural and biological methods for weed control have developed largely independently and are often concerned with weed control in different systems: physical and cultural control in annual crops and biocontrol in extensive grasslands. We discuss the strengths and limitations of four physical and cultural methods for weed control: mechanical, thermal, cutting, and intercropping, and the advantages and disadvantages of combining biological control with them. These physical and cultural control methods may increase soil nitrogen levels and alter microclimate at soil level; this may be of benefit to biocontrol agents, although physical disturbance to the soil and plant damage may be detrimental. Some weeds escape control by these methods; we... |
| Tipo: Journal paper |
Palavras-chave: Weed management. |
| Ano: 2003 |
URL: http://orgprints.org/1469/1/Hatcher_Melander_WR.pdf |
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| FONTANELLI, DR. M.; FRASCONI, DR. C.; LULLI, DR. L.; ANTICHI, DR. D.; BIGONGIALI, DR. F.; CARLESI, DR. S.; BARBERI, PROF. P.; PERUZZI, PROF. A.. |
| Weed competition is one of the most serious problems in vegetable crops. Physical and cultural methods represent the only adoptable solutions in organic farming systems. A two-year (2006-08) on-farm research is being carried out to test innovative operative machines for physical weed control on a typical vegetable crop sequence in the Arno Valley (Pisa, Italy). In this work we present the first results, obtained on organic fresh market spinach (Spinacia oleracea). The new strategy is compared with the standard crop and weed management system, characterised by the use of biodegradable maize starch mulch, and with a system in which the use of improved physical methods is coupled with the use of a subterranean clover (Trifolium subterraneum) living mulch.... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Weed management; Technology assessment. |
| Ano: 2008 |
URL: http://orgprints.org/12315/1/Fontanelli_12315_ed.doc |
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| Bos, M.. |
| Jacobskruiskruid (Jacobaea vulgaris, synoniem: Senecio jacobaea) is een van oorsprong in de zeeduinen voorkomende plant die uitstekend is aangepast aan veranderende omstandigheden op verschralende zandgronden. Daardoor komt de plant sinds de jaren ’70 in toenemende mate voor in weilanden. Omdat Jacobskruiskruid giftig is, is de aanwezigheid in weiland ongewenst. Zodra het in grasland voorkomt, blijkt het echter slecht beheersbaar, zelfs niet met herinzaai. Deze studie voorziet in een overzicht van bestaande internationale kennis en ervaring rond de Jacobskruidaardvlo Longitarsus jacobaeae in de biologische bestrijding van Jacobskruiskruid. Met deze Nederlandse keversoort zijn in het buitenland reeds positieve ervaringen opgedaan, maar in Nederland is... |
| Tipo: Report |
Palavras-chave: Weed management. |
| Ano: 2010 |
URL: http://orgprints.org/17282/1/Bos%2C_M._2010%2D011_Biologie_van_JacobskruidaardvloLongitarsus_jacobaeae_%2D_Internetversie.pdf |
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| Rotchés-Ribalta, Roser; Armengot, Laura; Mäder, Paul; Mayer, Jochen; Sans, Francesc Xavier. |
| The intensification of farming practices has reduced weed infestations, but it has also led to a reduction in weed diversity and changes in species composition. These effects are well described for aboveground flora; however, it is less clear how these effects might be expressed in the soil weed seedbank. We evaluated the effects of different long-term farm management strategies on the weed seedbank abundance, diversity, and community composition in the DOK (bioDynamic, bioOrganic, and Konventionell) field trial established in 1978 at Therwil, Switzerland. The trial compares biodynamic, organic, and conventional farming systems, which mainly differ in fertilization, weed control strategies, and pest control. The species richness and seed abundance of the... |
| Tipo: Journal paper |
Palavras-chave: Soil quality; Weed management. |
| Ano: 2017 |
URL: http://orgprints.org/31248/1/rotches-ribalta-etal-2017-WeedScience-Vol65-p73-82.pdf |
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| Melander, Bo; Znova, Liubava; Green, Ole. |
| New camera technology capable of detecting crop rows now makes it possible to employ selective weed control in spring cereals. Cereals are normally grown at 125 mm inter-row spacing but even moderate extension of the spacing can make enough room for automatically steered inter-row hoeing; the technology is being employed on an increasing number of organic farms. However, intra-row weeds, i.e. those growing in the crop lines, are not controlled and increasing the inter-row spacing to ≥ 250 mm may cause a yield penalty. The aim of this study was to investigate the interaction between inter-row cultivation, inter-row spacing and nitrogen rate on weed and crop growth. Results encompass four years field experimentation with spring barley and spring wheat... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Weed management. |
| Ano: 2018 |
URL: http://orgprints.org/35060/1/EWRS_18_BME.pdf |
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| Kuht, Jaan; Talgre, Liina; Madsen, Helena; Eremeev, Viacheslav; Loit, Evelin; Luik, Anne. |
| Keskkonnasõbralik umbrohutõrje maheviljeluses koosneb viljavaheldusest, äestamisest, vaheltharimisest, multšimisest, liblikõieliste kasvatamisest külvikorras ja vahekultuuride (sh talviste kattekultuuride) kasvatamist (Thorup-Kristensen jt., 2003). Käesoleva uurimisega seotud varasemad tulemused näitasid, et talvistest vahekultuuridest rukis osutus umbrohtudele kõige kahjulikumaks, pärssides umbrohuseemnete idanevust. Mõnevõrra vähem toimis raihein, mida oli märgata järgnevates kultuurides - herne ja odra umbrohutaimede tiheduses (Barberi jt., 2014). Lisaks kasvutihedusele vähendasid talvised vahekultuurid ka umbrohtude biomassi (Madsen jt., 2015). Väiksem umbrohtude arvukus ja biomass mõjutavad ka mulla umbrohuseemnete varu. Käesoleva uurimistöö... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Production systems; Farming Systems; Soil; Weed management. |
| Ano: 2017 |
URL: http://orgprints.org/32516/1/Kuht%20et%20al%202017.pdf |
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| Rasmussen, Jesper; Nørremark, Michael. |
| The main drawback by using crop soil cover in weed harrowing research is that it is assessed by visual scores, which are biased and context dependent. This problem may be solved by using digital image analysis. In this paper a new image capture standard and digital image analysis procedure was used to illustrate three key issues in relation to weed harrowing; selectivity, resistance and recovery. All issues require reliable assessments of crop soil cover. Crop soil cover was deduced from assessments of leaf cover, which is defined as the proportion of pixels in digital images determined to be green. Objective assessments of leaf cover and crop soil cover showed that the selectivity of weed harrowing in winter wheat and spring barley was unaffected by... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Weed management. |
| Ano: 2007 |
URL: http://orgprints.org/10759/1/10759.pdf |
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| Zillger, Christine; Dehe, Margit; Postweiler, Karin; Hoos, Sabine. |
| Maßnahmen zur Unkrautregulierung im Ökologischen Landbau, in dem chemisch-synthetische Herbizide nicht eingesetzt werden, basieren v.a. auf den Zusammenhängen von Fruchtfolge, angepasster Bodenbearbeitung, sowie mechanischen (Striegel- und Hacktechniken) und thermischen Maßnahmen (Abflammen). Mit Hack- und Striegeltechniken zur direkten Bekämpfung werden i.d.R. gute Ergebnisse erreicht. Schwierigkeiten bereiten Unkräuter u.a. noch in Reihenkulturen mit Feinsämereien, wie sie im Feldgemüsebau und dem Anbau von Heil- und Gewürzkräutern vorkommen. Aber auch in späten und langsam wachsenden, spät deckenden Sommerkulturen wie in Mais und Sojabohnen stellt Unkrautwuchs ein Problem dar. In einem Praxis/Demonstrationsversuch im Biolandbetrieb Hofgemeinschaft... |
| Tipo: Report |
Palavras-chave: Weed management. |
| Ano: 2006 |
URL: http://orgprints.org/7535/1/MechUnkrautregulierung_2006.pdf |
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| Melander, Bo. |
| Intra-row weeds constitute a major challenge in organic row crops and research has mainly aimed at replacing laborious hand weeding with mechanization. A number of investigations have focussed on optimising the use of thermal and mechanical methods and this paper reviews the major results achieved for horticultural and agricultural row crops. Mechanical methods, such as weed harrowing, finger weeding and torsion weeding, have provided promising results in transplants. In direct-sown row crops, however, successful weed control requires a strategy where mechanical methods applied post-emergence are preceded by pre-emergence flaming for the control of early and problematic weed cohorts. New methods, such as robotic weeding for row crops with abundant spacing... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Weed management. |
| Ano: 2011 |
URL: http://orgprints.org/20608/3/20608.pdf |
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| Gerowitt, Bärbel; Hofmeijer, Merel A.J.. |
| Diese Studie ist Teil des Core Organic Plus Projekts PRODIVA - eine Zusammenarbeit von nordeuropäischen Unkrautforschungsgruppen im Ostseeraum. Übergeordnetes Ziel ist es, eine diverse und handhabbare Unkrautflora im Ökologischen Landbau zu sichern. Bundesweit hat Mecklenburg Vorpommern einen sehr hohen Anteil an Ökologischer Landwirtschaft. Nach wie vor sind Unkräuter eine Herausforderung in diesen Agrarsystemen. Agrobiodiversität zu fördern, hat in Deutschland einen zunehmenden Stellenwert. Vor diesem Hintergrund sollten Unkräuter einerseits in langfristig handhabbaren Größenordnungen bleiben, andererseits aber auch eine artenreiche Flora bilden. Wir haben untersucht, ob diese beiden Aspekte durch ein vielseitiges Management der Kulturpflanzen... |
| Tipo: Report |
Palavras-chave: Biodiversity and ecosystem services; Weed management. |
| Ano: 2018 |
URL: http://orgprints.org/34326/1/34326-14OE004-uni-rostock-gerowitt-2018-provida.pdf |
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| Hunger, Stefan; Pekrun, Carola; Claupein, Wilhelm. |
| Before introduction of herbicides shallow ploughing was a widespread method of stubble tillage. In June 1999 25 trials on 7 organic farms were set up in South Germany. Three treatments of stubble tillage were compared: 1. “Stoppelhobel” (shallow ploughing); 2. “non inversion” stubble tillage (mostly chisel); 3. “control” (no stubble tillage). Results are shown for the first 16 months after initiating the experiments. In spring 2000 significant differences were assessed between the treatments “control” on one hand and “Stoppelhobel” and “non inversion” on the other with respect to perennial weeds. The same results were recorded on the stubble 2000. For annual weeds treatments never differed significantly. Yields showed no significant differences in most... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Weed management; Soil tillage. |
| Ano: 2001 |
URL: http://orgprints.org/8986/1/Hunger1.pdf |
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| Melander, Bo; Heisel, Torben; Jørgensen, Martin Heide. |
| Steaming the soil prior to crop sowing has the potential of eliminating weed seedling emergence completely. Thus, steaming might be a perspective technique for intra-row weed control in non-herbicidal row crops of high value, where manual weeding can be very laborious. This paper presents some preliminary results with the effects of steaming on weed seedling emergence. The work is part of a joint project involving both biological and technical aspects of steaming. The overall objective is to develop an applicable technique for applying steam in bands corresponding to the intra-row area of a row crop. Band-steaming is expected to use much less energy as compared to current steaming techniques for arable usage. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Weed management. |
| Ano: 2002 |
URL: http://orgprints.org/1545/1/1545.pdf |
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| Anon,. |
| The Ministry is seeking to encourage an expansion of organic farming with a research programme to provide information of benefit to organic farmers and to policy makers. The lack of a reliable and effective weed control system that does not rely on herbicides, has been highlighted as the major problem in limiting the growth of organic farming in the UK. Studies have been made that are aimed specifically at developing organic weed control techniques. There has also been work on non-chemical methods for dealing with weeds in conventional systems. Research in weed biology, population dynamics, and competition modelling from conventional systems also provide valuable information for improving weed control strategies. In addition, research into novel and... |
| Tipo: Report |
Palavras-chave: Weed management. |
| Ano: 1998 |
URL: http://orgprints.org/10110/2/weeds_in_organic_arable_and_horticulture_OF0152.pdf |
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| Dvorak, Petr; Tomasek, Jaroslav; Hamouz, Karel; Kuchtova, Perla. |
| Surface mulch is an important factor of soil protection technology in the cultivation of potatoes. Presented herein are the results of three years (2009–2011) of field trials at two sites (Leškovice and Uhříněves), where two cultivars (Finka and Katka) were grown. Three mulching treatments (grass mulch after planting, grass mulch before germination and black polypropylene mulch textile) were used in the study. The weight of marketable tubers (tuber over 40 mm) and tuber size distribution were influenced significantly by mulching. The application of grass mulch on surface of the row ensured a 20.5–24.8% increase of weight of marketable tubers and higher occurrence of tubers over 56 mm (resp. tubers 56–60 mm and over 60 mm). There was no consistent effect of... |
| Tipo: Journal paper |
Palavras-chave: Production systems; Soil; Weed management. |
| Ano: 2015 |
URL: http://orgprints.org/29446/1/Dvo%C5%99%C3%A1k%20final%20version.pdf |
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| Registros recuperados: 816 | |
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