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| Dorn, Brigitte; Musa, Tomke; Krebs, Heinz; Fried, Padruot; Forrer, Hans-Rudolf. |
| In laboratory, growth chamber, micro-plot and small-plot field trials, 53 copper-free preparations (CFPs) were examined for their potential to control potato late blight (PLB) caused by Phytophthora infestans (PI). In-vitro, 43% of the CFP inhibited the germination of sporangia or the mycelial growth of the pathogen completely. In growth chamber trials, 21% of them reduced PI foliar blight of tomato seedlings by at least 80%. In contrast, in small-plot field trials with potatoes under practice like applications, none of the CFPs sufficiently controlled the disease. Even in micro-plot field trials with applications twice a week the efficacies did not exceed 60%. With in-vitro tests we showed that the reason for the insufficient performance of the... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2009 |
URL: http://orgprints.org/14095/1/Dorn_14095.pdf |
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| Wittwer, Raphaël; Dorn, Brigitte; Mouron, Patrik; Lips, Markus; van der Heijden, Marcel. |
| There is an increased interest in Europe to develop organic farming systems with reduced tillage intensity. Besides technical and agronomical aspects, the profitability of these systems has to be viable for farmers to achieve a successful implementation in practice. A long-term trial was set up in 2009 at the research station Agroscope Reckenholz-Tänikon (ART) to compare conventional and organic farming systems with and without ploughing including a full cost calculation to assess the profitability of the different systems. First results show that the highest benefit was obtained under organic cultivation under Swiss legislation. Moreover, production costs were reduced with the adoption of conservation tillage. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farm economics; Soil tillage. |
| Ano: 2013 |
URL: http://orgprints.org/21242/1/21242_RaphaelWittwer.doc |
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| Forrer, Hans-Rudolf; Musa, Tomke; Krebs, Heinz; Dorn, Brigitte. |
| Phytophthora infestans, the cause of late blight, is the most devastating pathogen in potatoes world-wide. To replace copper fungicides in organic potato production, we examined preparations based on plant extracts, micro-organisms, and other natural compounds for their effect on late blight in field trials as well as in vitro and in vivo. Most of this work we realised as participants of the EU project Blight-MOP. The majority of the preparations effectively inhibited P. infestans in vitro or in vivo on tomato plants. However, under field conditions and with applications once a week, commercial and experimental copper-free preparations failed to sufficiently control late blight. In contrast, copper fungicides applied according to the decision support... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2006 |
URL: http://orgprints.org/7513/1/_org_joint_congress_010306.pdf |
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| Dorn, Brigitte; Jossi, Werner; van der Heijden, Marcel. |
| In large-plot field trials leguminous cover crops were examined under conservation tillage systems in organic farming conditions for their ability to suppress weeds. Cover crops were directly drilled after wheat harvest into the field. Suitability of cover crop was estimated by assessing their growth, soil coverage, biomass, biomass of weeds, mulch layer and yield of the main crop, which was either maize or sunflower. Fast growing cover crops, which had a high biomass, reduced weed growth most. Any cover crops grown reduced weed biomass significantly compared to the control without cover crop. Effects on the main crops will be determined after harvest in autumn 2010. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Weed management. |
| Ano: 2011 |
URL: http://orgprints.org/17405/3/Dorn_17405.pdf |
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