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Mode of action of lime sulphur against apple-scab (Venturia inaequalis)

Zemmer, Franziska; Marschall, Klaus; Kelderer, Markus and Zelger, Roland (2002) Mode of action of lime sulphur against apple-scab (Venturia inaequalis). In: Boos, Markus (Ed.) 10th International Conference on Cultivation Technique and Phytopathological Problems in Organic Fruit-Growing and Viticulture. Proceedings to the Conference from 4th to 7th Feb. 2002 at Weinsberg/Germany, pp. 94-95.

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Summary

Since lime sulphur was accepted in the annex 2b of the European Regulation 2091/92, more and more fruit growers use it to control apple scab in organic orchards. Field trials were carried out at the Research Centre Laimburg to evaluate stop and curative treatments with the aim to reduce the number of treatments and improving their efficacy. In this diploma thesis microscopic observations were performed for a better understanding of the mode of action of lime sulphur on apple-scab. The results showed that lime sulphur can stop the scab infection until the formation of the appressorium. If the infection proceeds to the formation of the primary stroma, the efficacy of the treatments with lime sulphur was insufficient.

Summary translation

Schwefelkalk erlebt derzeit im Ökologischen Anbau eine Renaissance. Nachdem es 1997 in den Anhang 2b der EU-Verordnung 2091/92 aufgenommen wurde, setzen heute europaweit viele Ökoobstbauern wieder Schwefelkalk gegen Schorf ein. Um unnötige Spritzungen einzusparen und die Wirkung der Behandlungen zu verbessern, wurden seit 1997 am VZ Laimburg Freilandversuche mit gezielten (Oberhofer und Ramoser 1965) und kurativen Behandlungen durchgeführt (Kelderer et al. 2000, Rizzolli 2000, 2001). Die vorliegende Diplomarbeit sollte mittels mikroskopischer Untersuchungen von mit Schorf infizierten Blättern genauere Erkenntnisse über die Wirkungsweise von Schwefelkalk auf den Krankheitserreger ermöglichen.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:Apple, organic orchards, scab, Venturia inaequalis, lime sulphur
Subjects: Crop husbandry > Crop health, quality, protection
Crop husbandry > Production systems > Fruit and berries
Research affiliation: International Conferences > 2002: Ecofruit
Related Links:http://www.ecofruit.net
Deposited By: Tagung, Ecofruit
ID Code:14605
Deposited On:30 Oct 2008
Last Modified:12 Apr 2010 07:38
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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