For good and sufficient application of phyto farmaceutical product is besides technicaly good sprayer, correct nozzle selection very important. In year 2017 a field trial was conducted on the Laboratory field of Biotechnical faculty in Ljubljana in which Lechler IDTA 120-03 C anti-drift nozzle with double asymmetrical flow was used. The special feature of this nozzle is an angle of front spray jet of 30o from vertical line and angle of back spray jet of 50o. Besides that, 60% of volume flow rate goes to front part and 40% of it goes to back part of nozzle. Spraying was carried out in the time of flowering of spring wheat with fungicide Prosaro. In trial three different pressures of spraying were used. The first pressure was 2,0 bar with water consumption of 166 l/ha, the second pressure used was 5,0 bar with water consumption of 262 l/ha and the last pressure was 8,0 bar with water consumption of 333 l/ha. On wheat head and leaves the deposit efficiency was analyzed with WSP and quantity of it with UV dye. The highest deposit quality was achieved with pressure of 5,0 bar both on head and leaves and the lowest quality was achieved with the spray pressure of 2,0 bar. Coverage of back site of wheat head was only 12% when using spray pressure of 2,0 bar. Quantity of deposit on back and front site of wheat head was much higher when pressure of spraying was 5,0 bar or 8,0 bar instead of 2,0 bar.
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