EN
Spray liquids proprieties (dynamic, static tension, contact angle) of herbicides and growth retardants mixture were better in their activities in comparison to undividual components of spray liquids. The effectiveness of herbicides applied with retardants dependend on active ingredients of herbicide. They provided similar or better weed control of Apera spica-venti compared to treatments with herbicides used alone. Mix application of fenoxaprop-P-ethyl with growth regulators better reduced winter wheat height and crop lodging than propoxycarbazone sodium used with CCC or PCa and growth regulators used alone. The additive effect of the fenoxaprop-P-ethyl and retardants influence was affirmed on the basis of conducted investigations on the winter wheat stalk height. The mixtures of herbicides with growth retardants did not have any negative influence on winter wheat plants cultivar Korweta.