First Appearance of White Mould on Sunflower Caused by Sclerotinia Minor in the Republic of Macedonia

Karov, Ilija and Mitrev, Sasa and Masirevic, S. and Kovacevik, Biljana (2011) First Appearance of White Mould on Sunflower Caused by Sclerotinia Minor in the Republic of Macedonia. Hellia - International Scientific Journal, 34 (54). pp. 19-25. ISSN 1018 - 1806

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Abstract

Sclerottnia spp. a very destructive fungus causing "white mould" became one of the biggest problems in sunflower breeding in the Republic of Macedo­nia in 2010. Field monitoring in the region of Bitola show very high infection of around 20-30%. Two types of symptoms where observed during the field mon­itoring. First symptoms were observed on the leaves of the Infected plants in the form of wilting, prior to flowering stage. The most characteristic symptoms were observed. at the lower part of the stem in the form of a stem cancer. Big variable sclerotia in size and shape were observed inside the stem. The appear­ence of white mycelium on the infected lower parts of the plant was often observed during the wet weather. Other infected plants showed different symp­toms. The stem was longer and thinner than in uninfected plants and the pit was very small around 9 cm. Sclerotia observed inside the stem were not big­ ger than 2.5 mm. In vitro investigations confirmed the presence of ascomycetes Sclerotinia sclerattorum (Lib.) de Bary and Sclerotinia minor Jagger, for the first time In the Republic of Macedonia. In vitra Investigation of antifungal abillty of Pseudomonas mediterranea Cattara et al., 2002 against S. sclerottorum and S.minor showed that it can be a possible antifungal agent against these ascomycetes.

Item Type: Article
Subjects: Agricultural Sciences > Agricultural biotechnology
Divisions: Faculty of Agriculture
Depositing User: Ilija Karov
Date Deposited: 13 Nov 2012 15:35
Last Modified: 13 Sep 2013 08:49
URI: http://eprints.ugd.edu.mk/id/eprint/793

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