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Field testing of strategies for fire blight control in organic fruit growing

Kunz, S.; Schmitt, A. and Haug, P. (2008) Field testing of strategies for fire blight control in organic fruit growing. In: Boos, Markus (Ed.) Ecofruit - 13th International Conference on Cultivation Technique and Phytopathological Problems in Organic Fruit-Growing: Proceedings to the Conference from 18thFebruary to 20th February 2008 at Weinsberg/Germany, Fördergemeinschaft Ökologischer Obstbau.e.V., D-Weinsberg, pp. 299-305.

[thumbnail of 299-305.pdf] PDF - German/Deutsch


In organic fruit growing effective control strategies are needed to prevent blossom infections by the fire blight pathogen Erwinia amylovora. Many potential control agents are under discussion and have been tested in vitro and in vivo. 19 out of 27 tested preparations showed a high efficacy against E. amylovora in vitro. Nevertheless, on detached apple blossoms only 7 of them led to a symptom reduction by more than 50%. In six field trials conducted according to the EPPO guideline PP1/166(3) BlossomProtect (82%), Myco-sin (65%) and Funguran (58%) had the highest efficiency. In 2006 and 2007, strategies to integrate BlossomProtect in spray schedules of organic apple production have been tested. The use of sulphur or lime-sulphur before or after BlossomProtect did not influence the efficiency of BlossomProtect, which showed that fire blight control is possible without compromising apple scab control. The addition of Cutisan to BlossomProtect reduced fruit russet. An alternating use of BlossomProtect and Myco-sin was shown to be possible.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:Fire blight, Erwinia amylovora, BlossomProtect, Myco-sin, Fruit russet, BÖL, BOEL, FKZ 03OE524/4, FKZ 03OE524/4F, FKZ 06OE336, Feuerbrandbekämpfung, ökologischer Obstbau
Subjects: Crop husbandry > Crop health, quality, protection
Crop husbandry > Production systems > Fruit and berries
Research affiliation: Germany > Federal Organic Farming Scheme - BOELN > Plants > Pflanzenschutz
Germany > University of Konstanz > Department of Biology
International Conferences > 2008: Ecofruit
Related Links:http://bundesprogramm-oekolandbau.de, http://bundesprogramm.de/fkz=03OE524/4, http://www.bundesprogramm.de/fkz=03OE524/4F, http://www.bundesprogramm.de/fkz=06OE336, http://orgprints.org/perl/search/advanced?addtitle%2Ftitle=&keywords=03OE524&projects=BOEL&_order=bypublication&_action_search=Suchen, http://orgprints.org/perl/search/advanced?addtitle%2Ftitle=&keywords=06OE336&projects=BOEL&_order=bypublication&_action_search=Suchen, http://www.ecofruit.net
Deposited By: Tagung, Ecofruit
ID Code:13719
Deposited On:24 Jul 2008
Last Modified:12 Apr 2010 07:37
Document Language:English
Refereed:Peer-reviewed and accepted

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