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.
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|
|Deposited On:||26 Jul 2006|
|Last Modified:||26 Aug 2010 12:21|
|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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