CHEMICAL PROTECTION OF OIL FLAX FROM WEEDS WITH MAGNUM AND MIUR HERBICIDES
Protection from weeds is an important element of the technology of oil flax cultivation. The aim of the work was to study the influence of the methods of application of the Magnum and Miura herbicides on the weed infestation, productivity and the harvest quality of oil flax cultivars of the breeding of V.S. Pustovoit All-Russian Research Institute of Oil Crops (VNIIMK). The research was conducted in 2018-2019 in the zone of unstable moistening on leached chernozem (Central experimental base, Krasnodar) with cultivar FLIZ; and in the zone of insufficient moistening on common chernozem (Don branch of VNIIMK, vil. Oporny, Azov area, the Rostov region) with cultivar Raduga. As a result of the research, we determined that in the zone of unstable moistening, the high biological efficiency of herbicides was identified while using Miura, EC (1.2 l / ha), Magnum, WDG (0.01 kg / ha) and their tank mixture, in the zone of insufficient moistening while using Magnum, WDG (0.01 kg / ha) and separate application of Magnum, WDG (0.01 kg / ha) and Miura, EC (1.2 l / ha). On average, for over two years of research in the zone of unstable moistening, the variants with the application of Miura, EC (1.2 l / ha) and Magnum, WDG (0.01 kg / ha) had the highest yield - 1.47 and 1.43 t / ha, respectively, and in the zone of insufficient moistening it was the variants with the application of Miura, EC (1.2 l / ha), Magnum, WDG (0.01 kg / ha) and their separate application - 1.25, 1.22 and 1.26 tons / ha, respectively. For efficient suppression of weeds and obtaining a high level of productivity of oil flax in the zone of unstable moistening on leached chernozem and in the zone of insufficient moistening on common chernozem in the phase of leaf development of oil flax plants, the herbicides should be applied separately: Magnum, WDG (0.01 kg / ha) should be applied at crop height of 3-10 cm against dicotyledonous weeds and Miura, EC (1.2 l / ha) should be applied in the phase of 2-4 leaves of annual weeds. The use of a tank mixture of these herbicides is not recommended due to its negative effect on the productivity and quality of oil flax.