Abstract
The three years experiments based on parsley roots of cultivars: Omega, Berlińska and Vistula. Nitrogen fertilizer was used in different levels (0, 100, 200, 300 and 400 kg/ha). Results of autumn analysis indicate that differentiated nitrogen fertilizing has no significant effect on health status of parsley roots. Spring examinations showed increase percentage of ill roots. Lower root infestation of each cultivar was in the combinations: 100 kg/ha and control without nitrogen fertilizations. Omega showed the best soundness. Experiments indicated that cultivar plays a more significant role than nitrogen fertilizing level. From ill parsley roots, the most often were isolated fungi: Alternaria radicina, Fusarium ave-naceum and F. oxysporum during spring; bacteria and fungi species: Sclerotinia sclerotiorum, Rhizoctonia solani and Alternaria radicina.
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