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Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 801
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Agertidsel Organic Eprints
Rasmussen, Ilse Ankjær.
Det er vigtigt at kombinere forebyggende metoder med de muligheder der er for direkte bekæmpelse. Men man skal også være klar over, at et enkelt års bekæmpelse næppe vil gøre det af med tidselproblemet...
Tipo: Web product Palavras-chave: Weed management.
Ano: 2009 URL: http://orgprints.org/18753/1/18753.pdf
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Agertidsler har fanden skabt - eller har han? Organic Eprints
Frank Hansen, Lisbeth.
Bekæmpelse af agertidsler
Tipo: Report chapter Palavras-chave: Weed management.
Ano: 2017 URL: http://orgprints.org/35112/1/Agertidsler%20har%20fanden%20skabt%20-%20eller%20har%20han.pdf
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Agronomic and economic evaluation of weed management methods in organic herb and vegetable production systems Organic Eprints
Kristiansen, Mr P; Sindel, Dr B; Jessop, Dr R.
Weed management is reported to be a major constraint in organic agriculture. Organic growers also report a lack of information about non-chemical weed control. A series of field trials was conducted in lettuce (Lactuca sativa L.) and echinacea (Echinacea purpurea (L.) Moench) crops to evaluate a range of weed control methods commonly used in organic herb and vegetable production systems. The criteria for evaluating the methods were weed growth, crop yield and cost effectiveness. Hand weeding, tillage and organic mulches (hay and pelletised paper) were effective to very effective at suppressing weeds. In general, good weed suppression was correlated with good crop yields; however, crop yields were reduced by tillage and paper mulch. Deducting the cost of...
Tipo: Conference paper, poster, etc. Palavras-chave: Vegetables; Weed management.
Ano: 2003 URL: http://orgprints.org/567/1/geelong_paper.pdf
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Alien species in the Finnish weed flora Organic Eprints
Hyvönen, Terho; Jalli, Heikki.
The present study aimed at assessing the invasion of alien weed species in Finland based on a review of their occurrence in the Finnish weed flora. The evaluation was conducted for the three phases of the invasion process, i.e. introduction, naturalization and invasion. The literature review revealed that 815 alien weed species occur in Finland of which 314 are regarded as naturalized. Based on their occurrence in different climate zones, the risk of naturalization of new harmful alien weed species was deemed low for those species not currently found in Finland, but higher for species occurring as casual aliens in Finland. In the latter group, 10 species of concern were detected. Exploration of the distribution patterns of naturalized species within...
Tipo: Journal paper Palavras-chave: Weed management.
Ano: 2011 URL: http://orgprints.org/19440/1/hyvonen.pdf
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'All models are wrong - but some are useful' - a report from an EWRS workshop on modelling weed population dynamics Organic Eprints
Rasmussen, I.A.; Bastiaans, L.; Holst, N.; Grundy, A.; Melander, B..
A three-day workshop on modelling weed population dynamics partially sponsored by the European Weed Research Society (EWRS) was held in October 2006 at Research Centre Flakkebjerg. 24 participants attended the workshop from 8 countries, mainly Europe and USA. The aim of the workshop was to gather some of those active and interested in the field, i.e. most of the participants had either published papers on weed population dynamic models or had a model under development. By gathering these people, it was our hope to learn from each other and possibly benefit by increasing the knowledge and use of each other's work. The EWRS saw the workshop as an opportunity to interconnect some of the work going on in (at least) three working groups: Weed Seed Germination...
Tipo: Conference paper, poster, etc. Palavras-chave: Weed management.
Ano: 2007 URL: http://orgprints.org/11348/1/WeedDynamics_keynote_Rasmussen_rev2.doc
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Allelopathic effects of Rumex obtusifolius leaf extracts against native grassland species Organic Eprints
Zaller, Johann G.
In perennial grasslands R. obtusifolius (broad-leaved dock) is often surrounded by certain plant species. Thus, it is hypothesized for the current study that Rumex can affect their neighbouring plant species by allelopathic interactions. To test this hypothesis, in a series of laboratory and field experiments aqueous extracts of green R. obtusifolius leaves were sprayed on seeds of 14 herbaceous plant species (graminoids, non-leguminuous forbs and leguminuous forbs) commonly native to perennial grasslands and its effects on seed germination compared with those with tap water spraying. An allelopathic effect was defined as inhibitory influence of Rumex extracts on seed germination relative to tap water. Generally, results of the laboratory experiments...
Tipo: Journal paper Palavras-chave: Weed management.
Ano: 2006 URL: http://orgprints.org/18277/1/Zaller_2006JPDP.pdf
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Almindelig kvik Organic Eprints
Melander, Bo.
Biologien hos alm. kvik.
Tipo: Web product Palavras-chave: Weed management.
Ano: 2009 URL: http://orgprints.org/16232/1/16232.pdf
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Alpbewirtschaftung veränderten Rahmenbedingungen anpassen Organic Eprints
Schürmann, Stefan.
Der Arbeitskräftemangel wirkt sich auf den Alpen besonders stark aus, weil dort sehr viel Handarbeit anfällt. Mit einer geschickten Weidenutzung und geeigneten Rassen können die Problempflanzen zurückgedrängt werden. Auf einer Alpvisite oberhalb Ollon werden Lösungen diskutiert.
Tipo: Web product Palavras-chave: "Organics" in general; Weed management.
Ano: 2018 URL: http://orgprints.org/34701/1/Schuermann-2018-Alpbewirtschaftung-veraenderten-Rahmenbedingungen-anpassen.pdf
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Aluskasveista apua luomuviljan rikkakasvintorjuntaan? Organic Eprints
Salonen, Jukka; Känkänen, Hannu.
Rikkakasvien torjunta ja viljelykasvien riittävä ravinteiden saanti ovat luomutuotannon suuria haasteita. Esitelmässä tuotiin esille aluskasvien mahdollisuuksia rikkakasvien hallinnassa. Aluskasveista näyttää olevan enemmmän hyötyä ravinteiden tuottajana/sitojana kuin rikkakasvien kasvun hillitsijänä. Pitkäaikaiset vaikutukset halutaan vielä selvittää kenttäkoesarjan jatkuessa.
Tipo: Conference paper, poster, etc. Palavras-chave: Crop combinations and interactions; Weed management.
Ano: 2018 URL: http://orgprints.org/32533/1/MTP2018_Salonen_p27.pdf
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Aluskasveja rikkakasvien kiusaksi Organic Eprints
Salonen, Jukka.
Luomuviljelijöille suunnatun luentopäivän esitelmämateriaali, jossa esitellään aluskasvien mahdollisuuksia rikkakasvien hallnitaan viljanviljelyssä. Esitys perustuu Luonnonvarakeskuksen kenttäkokeisiin Jokioisilla v. 2015-2016.
Tipo: Teaching resource Palavras-chave: Crop combinations and interactions; Weed management.
Ano: 2017 URL: http://orgprints.org/31404/1/JukkaSalonen_Aluskasveja-rikkakasvien-kiusaksi.pdf
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Aluskasvien mahdollisuudet luomuviljan rikkakasveja vastaan. Organic Eprints
Salonen, Jukka.
Hanke-esittely ProAgrian viljelijöille, aluksi ppt-esityksenä sisätiloissa (liite) ja koekentillä Jokioisilla. Luonnonvarakeskuksen (Luke) luomupelloilla Jokioisilla aloitettiin keväällä 2015 kaksi kenttäkoetta, joissa tarkastellaan erilaisten aluskasvien ja niiden seosten soveltuvuutta rikkakasvien hallintaan viljavaltaisessa viljelykierrossa. Koealueiden esikasvina oli apila/heinä-nurmi, joka kylvettiin 2013 kaura-suojaviljaan. Vuonna 2015 aluskasvit kylvettiin joko heti Wolmari-ohran kylvön jälkeen tai ohrakasvustoon heinäkuussa. Aluskasveja oli yhteensä 16 kasvilajia ja 18 lajiketta. Niitä sekoittamalla saatiin 8 erilaista vaihtoehtoa, joiden tavoitteena on joko typen sidonta (palkokasvit) tai keruu (heinät). Seoksina kylvettiin sekä...
Tipo: Teaching resource Palavras-chave: Weed management.
Ano: 2016 URL: http://orgprints.org/30628/1/LUKEKASesittely_JOKpellonpiennar210916_esitys.pdf
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Aluskasvien vaikutus luonnonmukaisesti viljellyn ohran ja rikkakasvien kasvuun. Organic Eprints
Koppelmäki, Kari.
Rikkakasvit ovat yksi suurimmista luomuviljelyn satoa rajoittavista tekijöistä. Tavallisesti luomutiloilla käytetyllä mekaanisella rikkakasvin torjunnalla on useita negatiivia ympäris-tövaikutuksia. Peitekasvien viljely on vaihtoehto mekaaniselle rikkakasvien hallinnalle ja samalla se tukee monia muita maataloudelle annettuja ympäristötavoitteita. Pohjoisissa oloissa yleisin tapa toteuttaa peitekasvien viljelyä on kylvää ne satokasvin aluskasviksi. Tässä tutkimuksessa selvitettiin aluskasvien vaikutusta ohran (Hordeum vulgare) ja rikkakasvien kasvuun Jokiosissa sijaitsevilla koekentillä. Lintupajussa oli kaksi erillistä koeasetelmaa, joista toinen oli lannoittamaton ja toinen naudan lietelannalla lannoitettu (50 N kg/ha) koeasetelma. Kokeessa oli neljä...
Tipo: Thesis Palavras-chave: Crop combinations and interactions; Weed management.
Ano: 2016 URL: http://orgprints.org/31144/1/Kari_Koppelmaki_Thesis_9_2016.pdf
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Ampfer erfolgreich kontrollieren Organic Eprints
Finze, Jana; Böhm, Herwart.
Ampfer breitet sich im ökologisch bewirtschafteten Grünland zunehmend aus. Das Institut für ökologischen Landbau der Bundesforschungsanstalt für Landwirtschaft in Trenthorst führte daher im Rahmen eines Projektes des Bundesprogramms Ökologischer Landbau Versuche zur Regulierung von Ampfer im Grünland durch (Direkte Kontrolle mittels manuellem Ampferstechen, maschinellem Ampferstechen mit der Wurzelziehmaschine WUZI und Abflammen jeweils mit und ohne Nachsaat sowie Auswirkungen des Beweidungsmanagements) und befragte bundesweit 156 ökologisch wirtschaftende Landwirte. Die Umfrage zeigte, dass fast die Hälfte der Betriebe Probleme mit Ampfer im Grünland haben, bei weiteren zwanzig Prozent sind diese Probleme sogar besonders gravierend. Jeder Betrieb hat auf...
Tipo: Journal paper Palavras-chave: Pasture and forage crops; Weed management.
Ano: 2004 URL: http://orgprints.org/3520/1/Ampfer%2DBioland01%2D04.pdf
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Ampfer im Grünland erfolgreich kontrollieren - Ein praktischer Leitfaden für den ökologischen Landbau Organic Eprints
Bundesforschungsanstalt für Landwirtschaft, FAL.
Insbesondere die großblättrigen Ampfer-Arten Stumpfblättriger Ampfer (Rumex obtusifolius L.) und Krauser Ampfer (Rumex crispus L.) sind als lästiges Unkraut im Grünland bekannt. Durch ihren Blattreichtum verdrängen sie die Futtergräser, besitzen jedoch selbst einen sehr geringen Futterwert. Gemindert wird die Futterqualität durch den niedrigen Energeigehalt bzw. Zuckergehalt und den relativ hohen Gehalt an Oxalsäure.
Tipo: Other Palavras-chave: Weed management.
Ano: 2004 URL: http://orgprints.org/15135/1/boehm%2DBLE%2DFlyer_Ampfer_au%C3%9Fen.pdf
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Ampfer ohne Chemie bekämpfen Organic Eprints
Böhm, Herwart.
Neue Strategien gegen den hartnäckigen Platzräuber stellt Dr. Herwart Böhm, FAL, Institut für ökologischen Landbau, Trenthorst, vor.
Tipo: Newspaper or magazine article Palavras-chave: Weed management.
Ano: 2005 URL: http://orgprints.org/15133/1/boehm-2005-topagrar-Ampfer_ohne_Chemie.pdf
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Ampfer- und Distelbekämpfung im Ökolandbau Organic Eprints
Verschwele, Arnd; Böhm, Herwart.
Für die Regulierung von Wurzelunkräutern im Ökologischen Landbau stehen bislang keine zufriedenstellenden Strategien zur Verfügung. Seitens der Praxis und der Öko-Beratung wird jedoch immer wieder die Entwicklung solcher Strategien gefordert. Ziele des Vorhabens im Rahmen des Bundesprogramms Ökologischer Landbau waren zum einen die Durchführung einer bundesweiten Situationsanalyse auf ökologisch bewirtschafteten Betrieben zur Verbreitung und Regulierung der Ampfer-Arten und der Ackerkratz-Distel, zum anderen die genaue Spezifizierung des Forschungsbedarfes zur Regulierung dieser ausgewählten Wurzelunkräuter.
Tipo: Conference paper, poster, etc. Palavras-chave: Weed management.
Ano: 2004 URL: http://orgprints.org/15136/1/Verschwele_Boehm_2004%2DKurzfassung%2DStatus%2DSeminar%2D05%2D03%2D2004.pdf
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Ampfer- und Distelbekämpfung im Ökologischen Landbau Organic Eprints
Böhm, Herwart; Verschwele, Arnd.
Perennial weeds like Rumex spp. and Cirsium arvense are still difficult to control in organic farming systems. The presented results were part of a cooperative project within the Federal Organic Farming Scheme (BÖL) dealing with the control of perennial weeds. Aim of the project was to evaluate present strategies for controlling perennial weeds in organically managed farms and to determine new recommendations. A nation-wide survey of over 150 organic farmers in Germany showed, that ca. 30 % of the arable land is infested with the Canadian thistle (Cirsium arvense). Most of the farmers (n=140) have problems with C. arvense as well as Rumex spp. and/or Agropyron repens. The impact of soil tillage and crop rotation on controlling C. arvense in organic farming...
Tipo: Conference paper, poster, etc. Palavras-chave: Weed management.
Ano: 2004 URL: http://orgprints.org/8747/1/07_B%C3%B6hm_fertig.pdf
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Ampferkontrolle mittels Heissdampfinjektion Organic Eprints
Latsch, Roy; Sauter, Joachim; Kaeser, Alexandra.
A control method for broad-leaved dock (Rumex obtusifolius) with hot steam was tested in grasslands in Switzerland. More than 700 plants were treated with a mixture of hot water and steam at a temperature of 120°C and a pressure of 30 bar. The aim was to identify an optimum heating time, so that the plant mortality rate was more than 80 %. The necessary diesel and water consumption for the heating were measured. The success of the method is strongly related to the soil moisture. The results show, that the intended mortality rate of 80 % at a soil moisture of 30 % can be realized at a calculated heating time of 30 seconds. For this treatment 2.4 litre of water and 0.046 litre of diesel were needed.
Tipo: Conference paper, poster, etc. Palavras-chave: Crop husbandry; Weed management.
Ano: 2011 URL: http://orgprints.org/17768/3/Latsch_17768.pdf
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An investigation into the relationship between preceding break crops and weed populations in barley crops in organic ley/arable rotations Organic Eprints
Litterick, Audrey M; Watson, Christine A; Robson, Melissa C.
This report was presented at the UK Organic Research 2002 Conference. The relationship between weed populations and cereal crops following nine organic break crops was investigated in field trials in Warwickshire, Aberdeenshire and Ceredigion in 2001. Weed biodiversity was high on all sites and varied between sites in terms of species present. Severity of weed infestation differed significantly between sites and between cereals following different break crops. The impact of break crop species on the incidence and severity of the weed burden in the following cereal is discussed in relation to the field trials at the three sites.
Tipo: Conference paper, poster, etc. Palavras-chave: Weed management; Farming Systems.
Ano: 2002 URL: http://orgprints.org/8408/1/litterick_Break_crops_weeds_barley.pdf
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Analysis and Definition of the close-to-crop Area in Relation to Robotic Weeding Organic Eprints
Nørremark, Michael; Griepentrog, Hans W..
The objective of this paper is to analyse and define the field conditions close to the crop plants of sugar beet (Beta vulgaris L.). The aim is to use this study for the choice and development of new physical weeding methods to target weeds at individual plant scale level. It was found that the close to crop area is like a ring structure, comprising an area between an inner- and outer-circle around the sugar beet seedling. Physical weeding should not be applied to the area within the inner circle. The radius of the inner circle increases with the appearance of young beet leaves during the growth season. It was also found, that no weeds were germinating within 1 cm around individual sugar beet seedlings. Therefore this distance should be added to the...
Tipo: Conference paper, poster, etc. Palavras-chave: Weed management.
Ano: 2004 URL: http://orgprints.org/4834/1/4834.pdf
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