Identification of physiological races of Colletotrichum lindemuthianum occuring in Slovenia

Authors

  • Alenka Munda
  • Jelka Šuštar-Vozlič

DOI:

https://doi.org/10.14720/abs.45.1.16622

Keywords:

bean anthracnose, Colletotrichum lindemuthianum, common bean, physiological races

Abstract

Bean anthracnose, the most important fungal disease of common bean in Slovenia, is caused by a mitosporic fungus Colletotrichum lindemuthianum (Sacc. et Magnus) Briosi et Cav. The most appropriate measure to control the disease is growing of resistant cultivars. Breeding for resistance is limited by the existence of several physiological races of the pathogen and continuous development and introduction of new ones. It is necessary to constantly monitor the occurrence and dynamic of physiological races existing in certain area. With this aim, 47 isolates were obtained from several bean accessions in different bean growing areas in Slovenia. The fungus was isolated from infected pods and leaves. A set of 12 internationally accepted differential bean cultivars was inoculated with spore suspension obtained from single spore isolates. Plant reaction was screened following I - 10 severity scale. Four physiological races of the pathogen were identified. Using the binary nomenclature system they were assigned to races 23, 55, 103 and 131. The most frequent and widespread were races 55 and 23, named also lambda and delta. The research will continue by screening the autochthonous bean germplasm for susceptibility towards the existing races.

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Published

01.07.2002

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Original Research Paper

How to Cite

Šuštar-Vozlič, J. (2002). Identification of physiological races of Colletotrichum lindemuthianum occuring in Slovenia (A. Munda , Trans.). Acta Biologica Slovenica, 45(1), 3-7. https://doi.org/10.14720/abs.45.1.16622

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