Efficiency of biological preparations and seed treatments against corn diseases

The article presents the results of studies conducted in 2020-2023 on crops of the Rodnik 292 MV corn hybrid and the Etna variety. The purpose of the study is to study the effect of biopreparations and seed treatment agents against diseases of the Rodnik 292 MV corn hybrid and the Etna variety. Albit and Nikfan were used as biopreparations, and tetramethylthiuram disulfide (TMTD) and Fentiuram were used as seed treatment agents. The plant density was 60 thousand/ha. Fertilizers were applied at a dose of N120P90K40. Phosphorus-potassium fertilizers were applied under primary soil cultivation, nitrogen fertilizers under spring cultivation. The experimental design included: Control, Albit, Nikfan, Albit and TMTD, Nikfan and Fentiuram, Albit and Fentiuram, Nikfan and TMTD. Control was carried out without treatment. Corn seeds were treated with biopreparations at a dose of 10 liters of working solution per 1 ton of seeds. Seed treatment with TMTD was carried out at a dose of 4 liters of the preparation per 8 liters of water, and Fentiuram at a dose of 2 kg per 1 ton of seeds. The best results were noted with the combined treatment of corn seeds with biopreparations and seed dressings. The resistance to diseases of the Etna variety of corn was slightly higher than that of the Rodnik 292 MV hybrid corn. This can be explained by the fact that the Etna variety is more resistant to unfavorable environmental factors than the Rodnik 292 MV hybrid. It has been proven that the treatment of corn seeds before sowing with the Albit and Nikfan biopreparations has the greatest effectiveness against diseases than the action of the TMTD and Fentiuram seed dressings. The use of the recommended dose of the biopreparation with half the dose of the seed dressing has the greatest effectiveness in increasing the resistance of corn hybrids to diseases.