The use of chemical and biological preparations on potatoes as a preplant treatment of tubers

Relevance. In the potato industry, the use of biological techniques has become widespread to improve the quality of the seed material of tubers, reduce the incidence and damage of potato pests. Methods. Studies on the effectiveness of the use of biological and chemical techniques on potatoes were carried out at the experimental field of the Kostroma Research Institute of Agricultural Research — a branch of the A.G. Lorch Potato Research Center in 2021–2022. The purpose of the work is to identify the effectiveness of the use of the biological drug “BisolbiSan”, the intake of ozonation and the chemical fungicide “Maxim” on the yield and quality of potatoes in the Kostroma region. Results. The evaluation of the use of drugs as a pre-planting treatment of tubers on potatoes of the Favorit variety was carried out. With the combined use of “BisolbiSan” biologics and ozone, the greatest reliable increase in tuber weight from the bush was obtained at 177 g, which is 30.8% more than in the control version. When processing tubers with the chemical mordant «Maxim», the weight increase was 20.5% compared to the control. In all variants, a significant increase in the number of tubers (from 1.5 to 2.6 pcs/bush) was obtained compared with the control variant. The largest number of tubers from the bush (9.1 pcs.) was obtained by joint processing — «BisolbiSan» + ozone. The highest yield of the seed fraction in the amount of 13.8% was achieved when processing tubers with the «Maxim» mordant, which exceeded this indicator by 3.7% in the control version. The joint pre-treatment of tubers with “BisolbiSan” and ozone provided the highest yield of a large fraction (81.9%), while the treatment of tubers with the “Maxim” mordant produced the lowest indicator of all studied options (76.8%).