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Ilona Szabó

Abstract

- Zoltán Igmándy (1925-2000), prominent Hungarian mycologist, worked as professor of forest protection at the University of West-Hungary Sopron. His main research area was the investigation of wood-inhabiting poroid fungi of Hungary, their occurrence and importance in forest pathology and wood protection. During his 40 years of scientific activity Igmándy created a rich fungal collection (herbarium Z. Igmándy) which includes the complete polypore mycota known to occur in Hungary until 1990. The paper provides a brief compendium of the collection, a list of species characterised by the number of specimens, number of sampling locations and enumeration of the hosts and substrata of the specimens.

Open access

Viktor Papp and Ilona Szabó

Abstract

From the economical point of view, the genus Ganoderma is one of the most important groups of Basidiomycetes due to their medicinal effects and also because they cause decay in a very wide range of tree species all over the world. In this study new data of the Hungarian Ganoderma species are published and the specimens in accessible Hungarian herbarium collections are processed and revised. The article includes the nomenclatural status, the morphological characters, the host preference, frequencies and the details of the fungarium samples of six Ganoderma species (Ganoderma adspersum, G. applanatum, G. carnosum, G. cupreolaccatum, G. lucidum, G. resinaceum) as well. In total 215 Ganoderma specimens are examined and 10 hosts of the six native Ganoderma species new for Hungary are presented. The Hungarian locality and time of the collection of the only Ganoderma carnosum (IZ3122) specimen and two new localities of this rare species is published here for the first time.

Open access

Judit Kovács, Ferenc Lakatos and Ilona Szabó

Abstract

The paper reports on the occurrence and impact of Phytophthora species in a declining eastern black walnut (Juglans nigra) stand in West Hungary. The health condition of the trees was investigated and soil samples were taken from the rhizosphere of the trees two times per year in 2011 and 2012 in order to isolate Phytophthora species. Altogether 20 trees were selected for investigations. The species identity of the isolates was determined by morphological and molecular methods. Phytophthora cactorum and Phytophthora plurivora were found as supposedly responsible for the decline of the trees. The abundance of the two species was changing at the different sampling times, presumably due to the different weather conditions. The intraspecific diversity of both species was estimated based on the ITS1-5.8S-ITS2 sequences of the isolates.

Open access

Judit Sárándi-Kovács, Ferenc Lakatos and Ilona Szabó

Abstract

This paper reports on the current situation of the Phytophthora species occurring in a declining common alder (Alnus glutinosa) stand in North-West Hungary. The stand was affected by a severe epidemic caused by Phytophthora alni in the late 1990s. The authors evaluated the health condition of the forest stand and collected soil samples from the rhizosphere of twenty selected trees two times per year in 2011 and in 2012 in order to isolate Phytophthora species. A diverse Phytophthora community was found in the soil consisting of eight species with different aggressiveness and with different ecological demands. Pathogenicity tests confirmed the role of the collected strains in the decline of the alder stand.