Some topics in tan spot epidemiology - characteristic and significance the sources of primary infection
Wakulinski, W. | Zamorski, Cz. | Nowicki, B. | Schollenberger, M. (Szkola Glowna Gospodarstwa Wiejskiego, Warszawa (Poland). Katedra Fitopatologii) | Kachlicki, P. (Polska Akademia Nauk, Poznan (Poland). Inst. Genetyki Roslin)
The aim of the studies was characteristic of the sources of primary infection for tan spot. During the period 1998-01 the development of ascomata and condimata of Pyrenophora tritici-repentis on naturally infected wheat and triticale straws was monitored. The process of pseudothecia formation was extending over the time. It started immediately after harvest and protothecia of the fungus was commonly occurred each year already in the fall. The first fruit bodies with maturated typically pigmented ascospores were observed in January 2001 and a February 1998 and 99. The percentage of pseudothecia with maturate ascospores successively increased richening maximum in April when the massive liberation of spores from asci occurred. After the total ascospore release on surface of empty ascomata aroused conidiophores with conidia which may also act as inoculum source. The present studies indicated also on infected by P. tritici-repentis and triticale seed as a source of inoculum for tan spot
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