In the conditions of field experiment, the reaction of the symbiotic apparatus and the soybean seed productivity under different methods of treatment with fungicides were studied. It is shown that early seed treatment did not affect the vegetative mass of plants and the process of formation and functioning of legume-rhizobia symbiosis, in contrast to the introduction of fungicides on the day of sowing. It was found that in the field the toxicity of the fungicides under both treatments was lower compared to the conditions of the model pot experiments and the yield of soybean plants significantly not decreased. It is shown that the yield of soybean seeds increased for the use of fungicides Standak Top (treatment for 14 days) and Acanto Plus (treatment for vegetation). The seed productivity of plants in other variants of the experiment was at the control level.
Keywords: Bradyrhizobium japonicum, soybean, symbiosis, nitrogen-fixing activity, fungicides, Standak Top, Fever, Akanto Plus, seed productivity
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