Influence of treatment of seeds with disinfectants and microfertilizers on seeding quality and yield of spring wheat

The research was conducted in 2019–2020 at the Myronivka Institute of Wheat. Seeds of such spring wheat varieties as MIP Zlata, Bozhena, MIP Raiduzhna, Diana were used in the experiment. When determin-ing the sowing qualities of spring wheat seeds, depending on the treatment with the disinfectant, it was found that these preparations had a positive effect on them. Seed treatment was carried out with disinfectants Maxim Star 025 FS (1.5 l/t), Yunta Quattro FS 373.4 (1.5 l/t), Cruiser 350 FS (0.5 l/t) in combination with micro-fertilizer Orakul nasinnia (0,5 l/t). Seed treatment with the studied chemicals revealed an increase in seed germination activity by 5–15 % and a slight increase in seed vigor and laboratory germination. The highest seed germination activity of the studied varieties was observed at treatment with combi-nation of Cruiser 350 FS + Orakul nasinnia, highest indicator of seed vigor – Celest Max 165 FS + Orakul nasinnia, and laboratory germination – Yunta Quattro 373.4 FS + Orakul nasinnia. The grain yield was significantly increased due to the seed treatment of spring wheat with dressing chemicals in combination with biological microfertilizers. The increase in grain yield was: MIP Zlata – 0.31–0.35 t/ha, Bozhena – 0.30–0.36 t/ha, MIP Raiduzhna – 0.32–0.38 t/ha, Diana – 0.31–0, 35 t/ha. Higher in-creases in grain yield of all varieties were observed when seed dressing was carried out with insecti-cides/fungicides together with the biological microfertilizer Orakul nasinnia. On the basis of the conducted researches, it was established that grain yield and sowing seed qualities of spring wheat under seed treatment with combination of seed dressing chemicals with microfertilizer were significantly increased. As a result, we suggest seed farmers to apply the foregoing seed dressing chemicals. Key words: spring wheat, seed dressing chemicals, microfertilizer, seed treatment, sowing quality, yield.