Summary:

The aim of the study conducted in the years 2005-2006 was to determine the influence of sprinkler irrigation and four nitrogen fertilization doses (0, 40, 80, 120 kg N•ha-1) on health status of true millet cv. ‘Jagna' cultivated on a very light soil. Investigations covered estimation of infestation degree with: complex of pathogens on roots and in the case of stem base - Oculimacula spp., Rhizoctonia spp., Fusarium spp. and Bipolaris sorokiniana. On leaves there was observed the intensity of Phyllosticta leaf blight and other necrotic spots. Irrigation caused the significant increase of root rot and stem base infesta-tion with Fusarium spp. and B. sorokiniana. Health status of non-irrigated true millet was dependent mostly on rainfall. Lower intensity of most diseases was noted in the year characterized by lower rainfall amounts during the vegetation period of millet. The higher nitrogen dose resulted in the significant increase of infestation of millet roots and stem base with Oculimacula spp. The pathogenic fungi occurring on infected millet roots were mostly represented by Fusarium spp., especially F. solani, F. oxysporum and F. equiseti. Stem bases showed the occurrence of F. equiseti and B. sorokiniana. Presence of R. cerealis and R. solani in the damaged stem base and R. solani in roots was con-firmed with PCR assay.