Health status of cereals in dependence on the organic fertilizationZdrowotność zbóż w zależności od nawożenia organicznego

The study was carried out on experimental plots in Tomaszkowo (53.7 N, 20.4 E) near Olsztyn in 2007–2008. A long-term, strict experiment was set up in 1972 according to the random plot design with six replications. Pig liquid manure and farmyard manure were used in the experiment. Phosphorus and potassium applied in the amount of 1/2 dose half of the plots of pig liquid manure and farmyard manure. The control object was not fertilized. The study included spring barley and winter. The highest occurrence of disease was on the treatment fertilized with higher dose of liquid manure, while the lowest in the control object. Fungi of the genus Fusarium constituted the most threat to cultivated cereals. F. oxysporum, F. culmorum and F. equiseti were most frequently isolated from the stem base.