Weed control is one of the most important factors for a successful crop production and therefore the prevention of weed–crop competition at an early stage plays a very important role. From the beginning of the growing season until a plant height of 25–30 cm potato is very susceptible to weed infestation.Results of the three–year herbicide efficacy investigation Dual 960EC + Prometrin SC 500; Basagran 600 SL + Prometrin SC 500 and Sencor WP 70 + Fusilade super combined with mechanical weed control on the potato yield have presented. Investigated herbicide combinations have influenced weed species and number decrease. Regarding control plot without herbicide application, all investigated combinations have shown significant increase of potato yield. The highest average yields in three years period have achieved by the combination Sencor WP 70 0.8 kg ha –1 + Fusilade super 2.5 lha –1 (28.2 t ha –1 ), that represented significant increase regarding most of the investigated variants.Statistical significance of herbicide efficacy and investigated year interaction have affected by the different effects of applied herbicide combination on potato yield, depending various meteorological conditions.

weeds; herbicides; potato; yield

Presentation: oral