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| Registros recuperados: 13 | |
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| Hallmann, Johannes; Rau, Florian; Puffert, Markus. |
| The root-knot nematode Meloidogyne hapla is a major pest in organic farming causing severe damage especially on vegetables. Common practices such as high cropping frequencies of legumes and low frequencies of cereals in association with unsatisfactory weed control are assumed to be major factors for nematode build-up. Due to the broad host spectrum of M. hapla strategies solely based on crop rotation are often not sufficient in controlling the nematode. A series of field experiments was conducted to develop more efficient control strategies. Based on the results a recommendation for reducing high nematode densities was developed which is build on black fallow throughout the main vegetation period buffered by additional measures such as previously growth of... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2007 |
URL: http://orgprints.org/9488/1/9488_Hallmann_Poster.pdf |
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| Hallmann, Johannes; Klinger, Sonja; Rau, Florian. |
| Plant parasitic nematodes are an increasing threat to organic farming in Germany. Especially taxa with broad host spectra and high multiplication rates such as Meloidogyne hapla and Pratylenchus spp. can cause severe damage up to total loss of the crop. The control of these nematodes is extremely difficult. Resistant cultivars are not available and only few non-host crops are known. Weed control is another important issue as most weeds are excellent hosts. In 2003 and 2004 two on-farm trials aimed at controlling M. hapla and Pratylenchus spp. were conducted in Niedersachsen, Germany. Results from these trials can be summarized as follows. For M. hapla, best control was achieved with black fallow and maize in combination with weed control. Fodder radish... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2005 |
URL: http://orgprints.org/3477/1/3477.pdf |
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| Hallmann, Johannes; Fittje, Susanne; Warnecke, Hermann; Buck, Holger; Rau, Florian; Krüssel, Stefan. |
| Pflanzenparasitäre Nematoden können in engen Gemüse-Fruchtfolgen erhebliche wirtschaftliche Schäden verursachen. Zu den Hauptschaderregern gehören Meloidogyne hapla und Pratylenchus spp. Gefördert werden diese Nematoden insbesondere durch den Anbau von Leguminosen. Im vorliegenden Forschungsvorhaben wurde untersucht, wie Leguminosen anzubauen sind, um einerseits Stickstoff zu fixieren, andererseits aber eine Vermehrung von M. hapla zu verhindern. Eine Lösung könnte der Anbau als überwinternde Leguminosen-Gründüngung darstellen. In dreijährigen Feldversuchen konnte gezeigt werden, dass es bei Aussaat der Leguminosen-Gründüngung ab Ende August nicht mehr zu einer Nematodenvermehrung vor Beginn der Winterruhe kommt. Im folgenden Frühjahr muss dann erst wieder... |
| Tipo: Report |
Palavras-chave: Crop combinations and interactions Vegetables Crop health; Quality; Protection. |
| Ano: 2012 |
URL: http://orgprints.org/20939/1/20939-06OE052-jki-hallmann-2012-pflanzenparasiteare-nematoden-gemuesebau.pdf |
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| Schmidt, Jan Henrik; Finckh, Maria R.; Hallmann, Johannes. |
| Pflanzenparasitäre Nematoden können in Abhängigkeit von Fruchtfolge und Bodenbewirtschaftung teils hohe Populationen aufbauen und dann bei anfälligen Kulturarten erhebliche Ertragsverluste verursachen. Dies betrifft insbesondere Arten mit einem breiten Wirtspflanzenspektrum, wie Vertreter der Gattungen Meloidogyne oder Pratylenchus. Im Rahmen des EU FP7 Projektes OSCAR (www.oscar-covercrops.eu) wurde der Einsatz von Minimalbodenbearbeitung, verschiedener Haupt- und Zwischenfrüchte bzw. Untersaaten sowie Düngung (Kompost, N-Dünger) auf pflanzenbauliche und bodenkundliche Parameter untersucht. Hierzu wurden an vier Standorten (Italien, Schweiz, Deutschland und Schweden) jeweils 2 Feldversuche durchgeführt. Jeder Feldversuch bestand aus einer 2-jährigen... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions Soil tillage Crop health; Quality; Protection. |
| Ano: 2016 |
URL: http://orgprints.org/29961/1/schmidt-etal-2016-jahrestagung_dpg-Arbeitskreis.pdf |
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| Hallmann, Johannes; Schmidt, Jan Henrik; Finckh, Maria Renate. |
| Agriculture has transformed over the past centuries dramatically to become highly dependent on non-renewable fossil fuels, synthetic fertilizers and plant protection agents. This often occurs at the cost of soil degradation and soil food web disturbance. Future agriculture must not only be productive but also provide ecosystem services such as carbon sequestration, pest and disease suppression, nutrient cycling and water storage to become sustainable in the long-term. Sustainability is especially fostered by reduced tillage and the presence of a permanent layer of plant residues. Under such conditions, soil compaction is reduced, soil structure improved, water infiltration enhanced, soil organic content increased and microbial activity stimulated. However,... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions. |
| Ano: 2015 |
URL: http://orgprints.org/28924/1/Ljubljana%20CropSustain%202015%2005.docx |
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| Hallmann, Johannes; Frankenberg, Andrea; Paffrath, Andreas; Schmidt, Harald. |
| In an attempt to evaluate the occurrence and economic importance of plant-parasitic nematodes in organic farming in Germany, a survey was conducted with the main emphasis on vegetable and cereal production systems. For vegetables, the survey included quantification and identification of plant-parasitic nematodes in soil samples and a questionnaire for growers querying production factors and damage levels. For cereals, the survey focused on quantification and identification of plant-parasitic nematodes in soil and plant samples. Overall, Pratylenchus and Tylenchorhynchus were the most prominent nematode genera under both production systems with an incidence of over 90% of the samples. Meloidogyne was detected in 51% of the samples in both systems. Other... |
| Tipo: Journal paper |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2007 |
URL: http://orgprints.org/15252/1/hallmann%2Detal%2D2007%2DNematology_Vol9_6__869%2D879.pdf |
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| Schmidt, Jan Henrik; Šišić, Adnan; Bacanovic, Jelena; Hallmann, Johannes; Finckh, Maria R.. |
| Plant parasitic nematodes may cause massive yield reductions in organic farming. Long rotations, often high amounts of weeds and a high frequency of legumes favour parasitic nematodes with a broad host range such as Meloidogyne spp. und Pratylenchus spp. The EU- Projekt OSCAR (Optimizing Subsidiary Crop Applications in Rotations) aims at improving soil conservation through minimum tillage combined with living mulches, cover crops and the use of suppressive composts. An experiment was set up with a rotation of 2-year grass-clover mix followed by wheat and then potatoes. Experimental factors were tillage, cover crops, and compost application. Until now Nematodes were sampled before and after wheat and before potatoes. Population dynamics over time were more... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions Cereals; Pulses and oilseeds Soil tillage Crop health; Quality; Protection. |
| Ano: 2014 |
URL: http://orgprints.org/29636/1/Brazilian_Congress_Schmidt.pdf |
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| Schmidt, Harald; Hallmann, Johannes. |
| Evaluating the problem of spotwise appearing cereal growth depressions 23 fields of 10 organic managed farms were investigated. Potential causes were soil nutrients and other chemical and physical soil properties as well as high abundance of the plant parasitic nematodes Heterodera avenae and Pratylenchus-, Tylenchorhynchus and Trichodorus species. In two on-farm field experiments different catch crops and a black fallow treatment caused a decrease of Pratylenchus and Tylenchorhynchus species. However, the yields of the following spring wheat were low, possibly due to H. avenae infestation. Fertilization with compost and potassium had no effect but the H. avenae resistant variety Isotta produced much higher yields. The conclusion drawn was that farmers... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Soil. |
| Ano: 2007 |
URL: http://orgprints.org/9594/1/9594_Schmidt_Vortrag.pdf |
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| Registros recuperados: 13 | |
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