The current paper has presented the study results (2016–2017) of the products ‘Selest Top’, ‘KS’ (the active ingredients are thiomethoxam (262.5 g/l), difenoconazole (25 g/l) and fludioxonil (25 g/l)) for pre-sowing treatment of rice seeds. The purpose of the work was to estimate the effect of the disinfectant ‘Selest Top’ on the sprouting energy, germination, the processes of initial growth and development of rice plants, to find out the biological efficiency of the product against root rot. There has been carried out a number of laboratory trials to study the effect of the product on sprouting, germination energy of seeds. When conducting a vegetation trial, there was estimated efficiency of the disinfectant against root rot. The test results were compared with the effect of the product ‘Vintsit’ (25 g/l of thiabendazole and 25 g/l of flutriafol). The disinfectant ‘Selest Top’ was used at a rate of 1.0 l/t, 1.5 l/t and 2.0 l/t. It was established that the studied products had no negative effect on sprouting energy and germination of rice seeds. The disinfectant had a positive effect on the length of the rice sprouts and also has a stimulating effect on the plant root system. It was identified that the length of roots increased on 2.2–3.0 cm (7 days) and 1.0–3.8 cm (14 days). There was established that the product had a high biological efficiency against root rot at all stages of rice development. The maximum indicators were obtained at a rate of 1.5 l/t with 57.3% (complete sprouts), 57.2% (panicle formation) and 37.2% (milky-wax ripeness). Under the agroclimatic conditions of Primorsky Krai, the pre-sowing seed treatment with the product ‘Selest Top’ is justified due to the high biological efficiency and increased plant resistance to root rot pathogens.
The results of research into effectiveness of fungicidal protectants against root rot and leaf-stem diseases of soybeans are presented. The study was carried out in the Primorsky Territory in 2019, 2020 in the conditions of plot experiment. Delete Pro (active agent pyraclostrobin, 200 g/l) was used at a consumption rate of 1.0 l/t, Redigo Pro (active agent prothioconazole, 150 g/l + tebuconazole, 20 g/l) – 0.9 l/t. The preparations were used for seed treatment in a semi-dry way before sowing. It was revealed that Delete Pro and Redigo Pro do not have a negative effect on the crop and have a positive effect on the germination of soybean seeds. A high fungicidal activity of the protectants used in the experiment was noted in relation to root rot affecting the crop. The chemicals helped to reduce the intensity of infections during the flowering phase by 17.0% (Delete Pro) and 24.9% (Redigo Pro). The protective effect of pre-sowing seed treatment with protectants was also revealed in reducing leaf-stem diseases. It was found that the chemicals have high biological effectiveness against septoria (16.7–25.2%), cercosporosis (0–44.6%) and peronosporosis (29.5–87.5%). The use of Delete Pro and Redigo Pro contributed to active growth of plants and an increase in the main productivity indicators: seed weight by 0.1–0.6 g, seed number by 1.4–2.8 pcs from one plant, as well as thousand-seed-weight by 8.5–9.3 g. Significant increase in grain yield of 0.19 t/ha (2019) and 0.20 t/ha (2020) was obtained in the variant with Redigo Pro. The protectants used contributed to the increase in the profitability level by 222 and 564%, respectively.
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