Treatment of oil flax seeds as a way to protect seedlings of harmful organisms in the conditions of the central zone of the Krasnodar region

The most important phytophages damaging oil flax are cruciferous flea beetles (blue and wavy) in the central zone of the Krasnodar region. The most prevalent disease is Fusariosis. Rational and environmentally acceptable method of oil flax seedling protection of pests and diseases is seed treatment by pesticide tank mixtures added with agrochemicals. This method is less ecologically dangerous than spraying of fields by pesticides of the same toxicity. The effect of pesticides and tank mixtures on oil flax seed germination was studied in the laboratory. According to the obtained data, seed germination in test variants was higher than in the control without treatment (92%) and amounted up to 94-98%. Treatment of oil flax seeds with pesticide tank mixtures Comandor, soluble concentrate (200 g per liter) + Zato, water dispersible granules (500 g per kg) and Poncho, SC (600 g per liter) + Lamador, SC (250 + 150 g per liter) added by agrochemicals provided increase of plant population up to 45.5% compared to the control. In 2015-2016, almost all tested pesticide tank mixtures showed a high biological efficiency against cruciferous flea beetles - at the level of 85.7-97.0 %. The pesticide tank mixtures Lamador, SC (250 +150 g per liter) + Poncho, SC (600 g per liter) + agrochemicals used for before-sowing treatment of oil flax seeds, showed a high protective effect against Fusarium wilt in both years of the study (51.1% and 41.8 %). The application of pesticide tank mixtures showed that reliable yield increases in the variants can reach 0.23-0.24 t per ha.