Abstract
In the autumn of 1999, a greater occurrence of uredinia of the rust Puccinia perplexans was noticed on the leaves of a grass species (Alopecurus pratensis) in permanent grass stands in the central Bohemian Forest (location Zhůří, altitude 10501080 m). Three methods of grassland management were tested at the experimental site: (1) Mowing once a year, (2) Mulching once a year and (3) No management (fallow stand). Disease severity was evaluated in three terms during September and October 1999. The most severely attacked by the rust was A. pratensis in the mown stand. A smaller infection occurred in the mulched stand, and the smallest extent of attack was found in the unmanaged stand. In 1999, a mass occurrence of the rusts at the ure- dinial and incipient telial stages was recorded on various grass species: Puccinia coronata var. coronata on A. pratensis and Holcus mollis, Puccinia festucae on Festuca rubra, Puccinia graminis subsp. graminicola on Deschampsia cespitosa, P. perplexans on A. pratensis, Puccinia poarum on Poa pratensis. In the subsequent year (2000), the same rust species were found on the same host plants except for P. perplexans. The occurrence of this species was mostly influenced by climatic conditions.
Zusammenfassung
Im Herbst 1999 befiel der Rostpilz Puccinia perplexans das Grünlandgras Alopecurus pratensis auf Bergwiesen im zentralen Böhmerwald am Standort Zhůří (1050–1080 m. ü. M.) besonders stark. Daraufhin wurde der Einfluss dreier Bewirtschaftungsverfahren auf den Pilzbefall untersucht: (1) Mähen, jährlich; (2) Mulchen, jährlich; und (3) Brachwiese (keine Bewirtschaftung). Die Befallsstärke wurde im September und Oktober 1999 dreimal bonitiert. Die höchste Befallsstärke von P. perplexans an A. pretensis wurde auf gemulchten Wiesen, die geringste auf Brachwiesen festgestellt. Im Jahr 1999 traten folgende Rostpilze epidemisch in verschiedenen Stadien an Gräsern auf: Puccinia coronata var. coronata an A. pratensis und Holcus mollis, Puccinia festucae an Festuca rubra, Puccinia graminis subsp. graminicola an Deschampsia cespitosa, P. perplexans an A. pratensis und Puccinia poarum an Poa pratensis. Im folgenden Jahr 2000 wurden alle Rostpilze mit Ausnahme von P. perplexans, dessen Auftreten vorwiegend klimatisch bedingt war, an denselben Wirten gefunden.
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Voženílková, B., Marková, J., Klimeš, F. et al. The influence of mountain meadow management on the occurrence of Puccinia perplexans Plow.. J Plant Dis Prot 115, 167–171 (2008). https://doi.org/10.1007/BF03356259
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DOI: https://doi.org/10.1007/BF03356259