Efficiency of Giberelonand Cytodef-100 phytohormones in the crop structure and productivity of sunflower in edaphoclimatic conditions of the Republic of Tatarstan

The studies were carried out to assess the effect of foliar dressing with Cytodef-100 and Giberelonphytohormones on fruit elements gross yield sunflower oil in edaphoclimatic conditions Republic Tatarstan. study was conducted crops Avenger hybrid Tatarstan 2019–2021. agrochemical indicators typical gray-forest soil as follows: humus content according Tyurin – 3.0%, mobile phosphorus 160 exchange potassium 145 mg/kg Kirsanov. medium response close neutral (pH 6.6). results show that total diameter heads increases from 10.9 cm control sample 13.3 joint use 3 agrochemicals phase 4-8 leaves: Euro-Lightningherbicide (1.2 kg/ha) + (150 g/ha) Giberelon (50 g/ha). At same time, empty part has a clear downward trend: 2.2 1.7 latter version. increase marketable products due combined antistress drug Giberelonphytohormone solution combination chemical weeding 15.2% compared (spraying Euro-Lightning without Agrosintez LLC products.