The article is devoted to highlighting the results of field studies conducted during 2019-2021 on the influence of multifunctional growth-regulating drugs with a fungicidal effect Architect tm and Helafit Combi on the productivity and optimization of water consumption of high-oleic sunflower hybrids in non-irrigated conditions of the steppe zone of Ukraine. The study was carried out under non-irrigated conditions in the experimental field of the "Mykolaiv DSDS IZZ NAAS" state institution of Ukraine (GPS: 46.980168, 32.148075) on southern low-humus chernozems. The program of scientific research provided for the foundation of a two -factor field experiment, in which sunflower hybrids were studied, namely Hector and Oplot (originator-V. Y. Yuryev Institute of crop production); DSL403 and P64GE133 (manufacturer Corteva, Brevant) and 8X477KL (manufacturer Dow Seeds). In the experiment, multifunctional growth -regulating preparations of chemical origin, i.e. Architect tm , and biological origin, i.e. Helafit Combi, were used. They were introduced in the form of foliar treatments of sunflower hybrids in the Phase 6-8 of real leaves with a rate of 1 l/ha. The weather conditions in 2019-2021 can be classified as medium -arid, typical for this growing zone, but the most favorable year was 2021. As for the temperature indicators, the average monthly air temperature for the study years was higher than the corresponding long-term average data. The results of three-year field studies showed that foliar treatments of sunflower hybrids of high-oleic type with Architect and Helafit Combi multifunctional preparations had a positive effect on improving growing conditions and increasing plant resistance to stress from high temperatures and lack of moisture. The study preparations contribute to a more economical use of soil moisture for the formation of a crop unit, as evidenced by a decrease in the water consumption coefficient for all the studied hybrids. The lowest water consumption coefficient of 1283 m 3 /t was found in the P64GE133 hybrid under the conditions of treatment of sunflower plants with a Helafit Combi combined preparation of biological origin. Foliar treatment of plants with combined growth-regulating preparations led to optimization of water consumption of agrocenosis in general.
Aim. Investigate the influence of treatment of maize plants with restrictive biological products on the formation of productivity of lines - parent components to optimize the elements of cultivation technology. Methods. 3-factor field experiment; measuring and weighing - to determine the structure of the crop; methods of mathematical statistics (analysis of variance, rectilinear and curvilinear correlation and regression). Results. Studies have shown that for the maximum manifestation of the sign "mass of 1000 grains" the optimal density is 70,000 plants ha-1. The increase in yield is positively influenced by the increase in the weight of 1000 seeds, which is due to both the genotype of the lines and the use of biologically active drugs Bio-gel, Helafit-combi. With the use of the drug Bio-gel laboratory germination increased by an average of 1.5 %, with the use of the drug Helafit-combi seed germination increased by 2.4 %. Conclusions. The maximum yield of the parent component DK 247 was observed at a density of 80 thousand plants/ha and treatment with the drug Helafit-combi - 4.89 t/ha. Mid-late lines - parent components DK 411 and DK 445 showed the highest yields at densities of 70,000 plants ha-1 and treatment with Helafit®-combi - 4.65 and 6.30 t/ha, respectively.