Fusarium head blight is one of the most important diseases on wheat which can cause numerous types of Fusarium genus. The most significant species that causes Fusarium head blight in USA, Canada and Europe is F. graminearum. The consequences of infection by Fusarium head blight are different, but the most common are: reduced yield, physiological and physico-chemical changes of grain and grain mycotoxin contamination. The aim of this study is to test occurrence of natural infection by Fusarium head blight depending of varieties, applied amount of nitrogen (0 kg/ha, 50 kg/ha, 100 kg/ha, 150 kg/ha) from fertilizer of ammonium nitrate (AN 33-35% N) and depending of seeding rate (300 grains/m², 500 grains/m², 700 grains/m², 900 grains/m²). Experiment was set up on Rimski Šančevi, Novi Sad, Serbia, on chernozem soil group. The study included 10 current and perspective varieties of winter wheat and triticale, which were created at the Institute of Field and Vegetable Crops in Novi Sad. Occurrence of Fusarium head blight was tested during the vegetation growing season 2012/2013 on nine winter wheat varieties (Arabeska, NS 40S, Zvezdana, NS Desetka, NS Avangarda, NS Futura, NS Ilina, Emina, Enigma) and one triticale variety (Odisej). The evaluation of the intensity of occurrence of infected ears was performed in phenophase of milk and wax maturity of wheat grain. The obtained results were statistically processed in the program Statistica 12 by using analysis of variance and Duncan's multiple range test. Tested varieties had low average number of infected ears by Fusarium head blight on area of Rimski Šančevi during 2013. Out of ten tested varieties, the highest average number of infected ears had Zvezdana (6.0) and the lowest variety Odisej (1.3). A higher level of correlation between the number of infected ears by Fusarium head blight and seeding rate was established at NS Futura variety. That indicates an increase of the number of infected ears with increasing seeding rate. Different amounts of the applied nitrogen for wheat top fertilization showed different effects to the occurrence of Fusarium head blight. The highest average number of infected ears is established at variety Zvezdana with 50 kg/ha of the applied nitrogen from fertilizer of ammonium nitrate. By increasing amounts of nitrogen, the number of infected ears increased at varieties NS 40S, NS Desetka, NS Futura and Enigma.

Fusarium head blight, seeding rate, fertilization

Presentation: oral