Determination of yielding, weed canopy infestation and Cercospora beticola (Sacc.) leaf infection of sugar beet under Dithane fungicide and two doses of Betanal and Fusilade herbicides was the aim of the investigation. The experiment was conducted on chernozem soil in East Lublin Region in the years 2000–2002. Four to six instances of spraying of Dithane fungicide the most limited the level of Cercospora beticola infection of leaves. That number of treatments influenced the crop yielding the most advantageously. The most yield-forming and weed controlling effect was gained by using a larger dose of herbicides.