Защита льна масличного от сорной растительности

Abstract

Potential seed yield of the modern oil flax varieties is equal to 2.5–3.0 t per ha, and its real meanings in 2019 in average in Russia was 0.83 t per ha, in the Southern federal region – 0.77 t per ha. One of the reasons of such low productivity of the crop is poorly effective measures of weed control. We studied the methods of herbicides application to select the most effective ones in 2019–2020 in a zone of unstable moistening (Krasnodar) on leached black soil and in a zone of insufficient moistening of the south of Russia (Oporny settl., Rostov region) on typical black soil in sowings of oil flax varieties FLIZ and Raduga bred at VNIIMK. We established the best way of a chemical plant protection of oil flax against weeds is a separate application of the herbicides Secator Turbo, MD (0.1 I per ha) and Miura, EC (1.2 l per ha). This variant did not demonstrate a negative effect of preparations on the crop and caused yield increase up to 0.20 t per ha. Also the high flax productivity, at the level of control variant with hand weeding of crops, were stated under separate application of the herbicides Magnum and Miura, Tifi and Miura. We recommended using these methods of herbicides application in zones of unstable and insufficient moistening of the south of Russia. We do not recommend to treat the crops with the herbicide Tifi after before-soeing application of Frontier Optima or Dual Gold and with tank mixture Magnum + Miura, Tifi + Miura, Secator Turbo + Miura due to their phytotoxic impact on the crop and negative effect on the indicators of plant productivity.