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| Georgakopoulos, D. G.; Fiddaman, P.; Leifert, C.; Malathrakis, N. E.. |
| Aims: Five bacterial strains belonging to Bacillus subtilis , Pseudomonas fluorescens and Ps . corrugata and two fungal strains belonging to Trichoderma viride and Gliocladium virens were evaluated for their efficacy in controlling sugar beet and cucumber damping-off caused by Pythium ultimum . Methods and Results: The in vitro antagonistic activity of bacteria against various Pythium spp. was evaluated with dual cultures in various media. Pseudomonas strains inhibited the pathogen better than Bacillus strains. To identify potentially useful antagonist combinations, dual compatibility of antagonists was also evaluated, based on growth in two liquid media containing substrate previously used by other antagonists. Four pairs of bacteria were selected. Sugar... |
| Tipo: Journal paper |
Palavras-chave: Crop health; Quality; Protection Soil biology. |
| Ano: 2002 |
URL: http://orgprints.org/10764/1/georgakopoulos_et_al_2002.pdf |
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| Schmidt, C. S.,; Agostini, F.,; Leifert, C.,; Killham, K.,; Mullins, C. E.,. |
| The effect of initial inoculum density of the antagonistic bacterial strains Pseudomonas fluorescens 135 and Pseudomonas corrugata 2140 (10(3) to 10(8) CFU per seed pellet) on sugar beet seedling colonisation, in situ bioluminescence and antagonistic activity towards Pythium ultimum was investigated. Populations of the bacteria colonising sugar beet root systems approached an apparent carrying capacity of 10(5) to 10(6) CFU per plant after 12 d growth, irrespective of inoculum density. This meant an up to 320-fold population increase at low inoculum densities and a decrease at high densities. Population densities of both bacteria and their corresponding in situ bioluminescence (resulting from luciferase enzyme expression from the inserted luxAB genes)... |
| Tipo: Journal paper |
Palavras-chave: Crop health; Quality; Protection Soil biology. |
| Ano: 2004 |
URL: http://orgprints.org/10763/1/Schmidt_et_al_inoculum_2004.pdf |
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| Avio, Dr. Luciano; Pellegrino, Dr. Elisa; Bonari, Prof. Enrico; Giovannetti, Prof. Manuela. |
| Arbuscular mycorrhizas are symbiotic associations that play a key role in plant nutrition by absorbing and translocating mineral nutrients from soil to host plants. Arbuscular mycorrhizal fungi, which are considered natural biofertilizers, show diverse levels of performance, depending on the ability of different isolates to promote plant growth and health. Here we investigated the performance of geographically different isolates of two fungal species, Glomus mosseae and G. intraradices, by assessing plant growth responses and P and N uptake in Medicago sativa, in order to select the most efficient fungi for this host plant. The four selected Glomus isolates significantly increased shoot dry weights and shoot N and P content of mycorrhizal plants, but their... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Soil biology. |
| Ano: 2008 |
URL: http://orgprints.org/11999/1/Avio_11999_ed.doc |
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| Ohne kupferhaltige Pflanzenschutzmittel ist derzeit kein Ökologischer Landbau von Wein, Hopfen und Kernobst möglich. Aus Literaturdaten über die Auswirkungen von kupferhaltigen PSM und Einträgen aus anderen kupferhaltigen Quellen in der Landwirtschaft auf Bodenorganismen lässt sich ableiten, dass Kupfer bei langjähriger Anwendung schädigend auf viele Arten von Bodenorganismen wirken kann. Ein valider Wert zur Festlegung eines Schwellenwertes oberhalb dessen mit unvertretbaren Auswirkungen auf das Bodenleben zu rechnen wäre, liegt nach dem derzeitigen Erkenntnisstand nicht vor, da bei einer Risikobetrachtung weitere Einflussgrößen wie z.B. Standortbedingungen, Bewirtschaftungsweise (Begrünung, Mulchen) und Pflanzenschutzintensität zu berücksichtigen sind.... |
| Tipo: Project description |
Palavras-chave: Crop health; Quality; Protection Soil biology. |
| Ano: 2010 |
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| Schmidt, C. S.; Agostini, F.; Simon, A. M.; Whyte, J.; Townend, J.; Leifert, C.; Killham, K.; Mullins, C.. |
| In five different soils originating from Scotland (Craibstone and Cruden Bay), Germany ( Magdeburg and Uelzen) and Greece (Tymbaki), Pseudomonas fluorescens B5 reached higher population sizes (4.7-5.7 log CFU/plant) on 12-day-old sugar beet seedlings than Bacillus subtilis MBI 600 (4.1 - 4.8 log CFU/ plant). Total population size per plant was not affected by soil type. In all five soils, the antagonists reached highest population densities in the hypocotyl and the upper 2 cm root section (P. fluorescens B5: 5.2-6.8 log(10) CFU/g plant fresh weight, Bacillus subtilis MBI 600: 5.2 - 6.1 log(10) CFU/g plant fresh weight) and declined to 0 - 3 log(10) CFU below 4 cm root depth. Colonisation by P. fluorescens B5 down the root was slightly increased in the... |
| Tipo: Journal paper |
Palavras-chave: Crop health; Quality; Protection Soil biology. |
| Ano: 2004 |
URL: http://orgprints.org/10761/1/Schmidt_et_al_2004.pdf |
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