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Nectria galligena as the cause of a collar rot disease in organically grown Topaz apple trees

Weber, Roland W. S. and Klopp, Karsten (2006) Nectria galligena as the cause of a collar rot disease in organically grown Topaz apple trees. [Nectria galligena als Ursache einer Kragenfäule-ähnlichen Krankheit bei der Apfelsorte Topaz im ökologischen Obstbau.] In: Boos, Markus (Ed.) ecofruit - 12th International Conference on Cultivation Technique and Phytopathological Problems in Organic Fruit-Growing: Proceedings to the Conference from 31st January to 2nd February 2006 at Weinsberg/Germany, Fördergemeinschaft Ökologischer Obstbau e.V. (FÖKO), Weinsberg, Germany, pp. 121-124.

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Symptoms resembling collar rot were detected in organically managed Topaz trees aged 3-10 years, occur-ring one to several years after planting of the orchard. Trees were killed within the same growing season in which symptoms were first observed. The disease commonly progressed as a complete covered canker at the base of the tree trunk. Isolation attempts were negative for Phytophthora and other Oomycetes, but con-sistently yielded Nectria galligena. The possibility of latent (endophytic) infections of N. galligena as the cause of delayed collar rot symptoms is briefly discussed.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:apple, canker, collar rot, endophyte, Nectria galligena, Topaz
Subjects: Crop husbandry > Crop health, quality, protection
Crop husbandry > Production systems > Fruit and berries
Research affiliation: Germany > Fördergemeinschaft Ökologischer Obstbau - FÖKO
International Conferences > 2006: Ecofruit
Related Links:http://www.ecofruit.net, http://www.foeko.de/ecofruit.htm
Deposited By: Boos, Markus
ID Code:8840
Deposited On:26 Jul 2006
Last Modified:26 Aug 2010 12:21
Document Language:English
Refereed:Peer-reviewed and accepted
Additional Publishing Information:The proceedings are available as paperback at Fördergemeinschaft Ökologischer Obstbau e.V. (FÖKO), Traubenplatz 5, D-74189 Weinsberg, www.foeko.de

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