Incrustation of seed of winter barley drugs and steroid glycosides Moldstim Ecostim leads to a change in photosynthetic activity of plants in fields. Under the influence of growth regulators are: increasing the leaf area of plants, leaf area index and indicators of photosynthetic capacity of leaf area, increase performance and Specific Leaf Weight and Net Assimilation Rate, increasing the concentration of plastid pigments in organs and whole plant and productivity decline of chlorophyll. A responsive variety for processing depends on their biological characteristics, as well as the intensity of meteorological conditions during the research.