The realization of the genetic potential of seed productivity of new varieties of oil flax considering the modern resource-saving technologies of the Southern federal district of the Russian Federation

Due to the development of new promising varieties of oil flax, the role or research aimed at developing zonal technologies for crop cultivation that contribute to the full realization of its genetic potential is increasing. The objects of research were the varieties of breeding of V.S. Pustovoit All-Russian Research Institute of Oil Crops (VNIIMK 620, Rucheyok, FLIZ, VNIIMK 620 FN, RFN) and its branches: the Don experimental station (Nebesny, Raduga, Avangard, Svetlyachok) and the Siberian experimental station (Sokol, Avgust). The work is aimed at developing the application methods of herbicides permitted for the use on oil flax in the zone of insufficient moistening in the Southern Federal District of Russia in resource-saving technologies. In the course of research, we revealed that the varieties of the Don experimental station Raduga, Avangard and Svetlyachok were the most adapted to the cultivation conditions of the zone of insufficient moistening. We established that in most cases the separate application of herbicides contributes to obtaining a higher yield of oil flax variety Raduga than when using the tank mixture of herbicides. We obtained the best results with the separate application of herbicides Secator Turbo and Miura (1.52 t/ha) and Tifi and Miura (1.51 t/ha), when the crop yield was comparable to the control under manual weeding (1.54 t/ha). Regardless of the application method, the herbicides contributed to a decrease in the oil content of flax seeds, to the greatest degree while using the tank mixtures, especially in case of application of Magnum and Herbitox in combination with Miura - by 0.9-1.2 %. Therefore, to increase the yield and quality of oil flax seeds in a zone of insufficient moistening in the south of Russia, it is necessary to use the separate application of herbicides Secator Turbo, OD (0.1 l/ha) and Miura, EC (1.2 l/ha) or Tifi, WDG (0.025 kg/ha) and Miura, EC (1.2 l/ha) on the crop sowings in the phase of leaf development.