Field experiments were conducted at the medium heavy luvisol under the unirrigated conditions at the locality with continental climate in the years 2002 and 2003. Foliar preparations ´Avit 35´ and ´Humix univerzál plus´ were sprayed at the sugar beet leaves during the vegetation. These liquid foliar preparations contain growth stimulators (humates, ethanolamine, ureasalicylate) enriched by macroelements and microelements. Two sugar beet varieties (STRUBEDIECKMANN) were involved in the experiment: a rhizomania sensitive one (´Swing´) and a rhizomania tolerant one
(´Takt´). The experimental locality was without BNYVV infection. Infl uence of foliar preparations in interaction with other factors (weather conditions, variety) on sugar beet yield and quality parameters (root yield, digestion, molasses forming substances, refi ned sugar yield) was evaluated in the experiment. Foliar preparations high signifi cantly increased the root yield and digestion in the year with suffi cient rainfalls and decreased molasses substances content in roots in both experimental years. There were high signifi cant differences in
digestion between the varieties. Rhizomania tolerant variety (´Takt´) reached better yield and quality parameters than the rhizomania sensitive variety (´Swing´) in conditions without rhizomania infection.
