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| Pfeiffer, B.. |
| Different strawberry varieties, available from organic propagation at that time were, planted in August 2004 and proofed about their suitability for organic cultivation, each variety was tested with and without biodegradable mulch film. Within the early ripening strawberry varieties ‘Clery’ had a middle yield and was susceptible for infections with leaf spot, losses of plants by Verticillium were seldom. This variety should be planted early to reach enough vigor in autumn. ‘Clery’ has an interesting potential in the phase of higher prices at the beginning strawberry season. ‘Darselect’ ripened shortly before ‘Elsanta’, the yield was lower, but the fruit-size bigger, so the picking could be done more quickly. ‘Elsanta’ showed in this trial under... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2008 |
URL: http://orgprints.org/13658/1/133%2D137.pdf |
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| Pfeiffer, B.; Eis, B.; Zimmer, J.; Fieger-Metag, N.. |
| Main topics of the research-project FuE 03OE088 of “Bundesprogramm Ökologischer Landbau” (30.04.2004-31.12.2006) were the testing of foliar fertilizers in organic apples and pears, optimizing lime sulphur for blossom thinning, looking for alternatives to lime sulphur for blossom thinning and looking at different combinations of thinning measures. Only the results of testing foliar fertilizers (carried out by KoGa Ahrweiler and OVB/ÖON Jork) and combinations of thinning measures (carried out by LVWO Weinsberg) are described in this article. Over three years only a small increase in yield was evaluated for the fertilizers Aminosol PS and Wuxal Ascofol (site Ahrweiler, apple variety ‘Elstar’). In Jork (apple variety ‘Holsteiner Cox’) yield could only... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2008 |
URL: http://orgprints.org/13741/1/324%2D329.pdf |
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| Pfeiffer, B.; Alt, S.; Schulz, C.; Hein, B.; Kollar, A.. |
| The intention of this research project, which was supported within the "Bundesprogramm Ökologischer Landbau", was to find alternatives for the control of Venturia inaequalis for the organic fruitgrower. Beside the investigations on reducing the ascospore potential on fallen leaves, experiments were conducted in laboratory, greenhouses and in orchard to test direct control of scab with different plant extracts, concentrations and methods of extraction. Extracts from Inula viscosa, Quillaja saponaria-bark, citrus-species (AGROMIL) and Saponaria officinalis revealed a distinct efficacy against apple scab in greenhouse studies on apple seedlings. ELOT-VIS, CHITOPLANT, COMCAT, MOOSEXTRAKT, SILIOPLANT und FZB 24 did not show sufficient efficacy with the... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2004 |
URL: http://orgprints.org/14452/1/20_Pfeiffer_101_107.pdf |
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| Pfeiffer, B.. |
| In organically cultivated orchards of the LVWO Weinsberg in the years 2006 and 2007 trials were carried out about new products and their efficacy against apple scab. In the year 2006 (variety ‘Gala’) Armicarb and BioPluss sprayed preventively during primary ascospore season could not convince, also not in combination with lime sulphur as stopapplication. Armicarb showed at ‘Gala’ a tendency to increase russetting of the fruits. In the year 2007 (Variety ‘Elstar’) different combinations of wetting sulphur with yuccasaponin and stop-applications (lime sulphur, Armicarb) were tested with focus on the time immediately after blossom. The effect of Armicarb as stop-application was weaker than of lime sulphur at an infection-period with extreme high... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2008 |
URL: http://orgprints.org/13640/1/041%2D046.pdf |
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| Belz, J.; Pfeiffer, B.. |
| The intention of this research project, which was supported within the "Bundesprogramm Ökologischer Landbau", was to investigate in 2003 the situation on organic apple farms of nutrition of leaves and fruits of the variety 'Topaz' and 'Elstar'. The contents of N, P, K, Ca and Mg were determined in the leaves in April, June and August, micronutrients like Fe, Mn, Zn, B and Cu in April and August. The number of flower-clusters per tree, the fruit-setting and the yield were investigated. There were great differences between the orchards, the yield per tree varied between 3 and 24 kg, depending from the age and height of the trees. Field trials were done to proof the effect of the foliar fertilizers Vinasse, Biokal, Phytoamin, Wuxal Ascofol and Humulus.... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2004 |
URL: http://orgprints.org/14529/1/28_Belz_150_156.pdf |
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