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Reduzierung des Ascosporenpotentials von Venturia inaequlis durch Förderung der Fallaub-Zersetzung

Krüger, Erika; Rasim, Sabine; Rehmet, Tanja and Zwermann, Petra (2000) Reduzierung des Ascosporenpotentials von Venturia inaequlis durch Förderung der Fallaub-Zersetzung. In: Boos, Markus (Ed.) 9. Internationaler Erfahrungsaustausch über Forschungsergebnisse zum Ökologischen Obstbau. Beiträge zur Tagung vom 3.- 4. Februar 2000 in Weinsberg/Germany, pp. 12-17.

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Summary

The aim of this study was to investigate the possible enhancement of leaf decomposition by means of different nitrogen containing products or mulching of leaves and the resulting reduction of the ascopore potential of Venturia inaequalis. For each treatment 30 scabbed leaves of 'Jonagold' were placed in wire-mesh cages with or without fleece to avoid or allow activity of earthworms, respectively. The leaves were treated as follows: untreated as a control, spraying or addition of: urea (46% N), Siapton (organic liquid fertiliser, 7% N), horn meal (organic fertiliser, 10-14% N), Radivit (decomposition enhancer, 9% N) and slightly rotted manure (0,5% N). All treatments were adjusted to a similar amount of N per m2. In addition leaves in one treatment were mulched.
The decomposition of leaves was strongly enhanced by mulching and use of Radivit in both years, irrespective of interference by earthworms. Application of urea enhanced decomposition of leaves only in the first year. In tendency, ascospore production was reduced by all treatments in comparison to the control. The lowest number of ascospores was obtained after mulching of leaves in both years. For all other treatments, the influence of the weather and application/distribution technique are discussed.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Subjects: Crop husbandry > Crop health, quality, protection
Crop husbandry > Production systems > Fruit and berries
Research affiliation: International Conferences > 2000: Ecofruit
Related Links:http://www.ecofruit.net
Deposited By: Tagung, Ecofruit
ID Code:14892
Deposited On:04 Aug 2009
Last Modified:12 Apr 2010 07:38
Document Language:German - Deutsch
Status:Published
Refereed:Peer-reviewed and accepted

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