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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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| 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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| 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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| Larbi, M.; Gobat, J.-M.; Fuchs, J. G.. |
| Extracts of green waste compost have been shown to inhibit plant diseases. In this study, the factors influencing the mechanism of inhibition of apple scab (Venturia inaequalis) and grapevine downy mildew (Plasmopara viticola) were studied. Extracts were prepared from samples of 30 composts from commercial composting plants. Composts were extracted with 1:2 or 1:5 water for 2 or 7 days. Extracts were applied to seedling of apple and grapevine. The seedlings were artificially inoculated with V. inaequalis or P. viticola, respectively and incubated under controlled conditions. After inoculation, severity of diseases and lesion diameter were measured. The incubation time and the compost/water ratio did not influence the capacity of the extracts to protect the... |
| Tipo: Book chapter |
Palavras-chave: Crop health; Quality; Protection Composting and manuring. |
| Ano: 2006 |
URL: http://orgprints.org/10317/1/larbi%2Detal%2D2006%2Dorbit_conference.pdf |
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| Tamm, L.; Thürig, B.; Bongiorno, G.; Postma, J.; Fuchs, J. G.; Oberhänsli, T.. |
| Soils suppressive to soil-borne diseases have attracted the attention of farmers and researchers for decades and many suppressive soils have been described. Microorganisms and soil microbial communities involved in suppressiveness have been studied intensively, but the underlying mechanisms are still not well understood. Suppressiveness to soil- as well as air-borne diseases has been shown to be highly site-specific. We will review how suppressiveness can be influenced by agricultural practices. Suppressiveness destroyed e.g. by steam sterilisation of soils could only be partially restored on the short-term by re-inoculation of soils, and the success of re-inoculation depended on the soil matrix as well as on the inoculum used. Long-term management (e.g.... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil biology Crop health; Quality; Protection. |
| Ano: 2018 |
URL: http://orgprints.org/34926/1/2018ICPPPromotionalFlyer.pdf |
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| Fuchs, J. G.; Baier, U.; Berner, A.; Mayer, J.; Tamm, L.; Schleiss, K.. |
| Composts can influence soil fertility and plant health. These influences can be positive or negative, depending of the quality of the composts. Some practitioners already make use of the positive effects on plant health. For example, they use composts to protect their plants against soil borne diseases in substrate, or to detoxify and reactivate soil after steaming. In order to estimate the potential of Swiss composts to influence soil fertility and plant health positively, we analyzed one hundred composts representative of the different composting systems and qualities available on the market. The organic substance and the nutrient content of the composts varied greatly between the composts; the materials of origin were the major factor influencing... |
| Tipo: Book chapter |
Palavras-chave: Soil quality; Composting and manuring. |
| Ano: 2006 |
URL: http://orgprints.org/9218/1/fuchs%2Detal%2D2006%2Dorbit.pdf |
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