The effectiveness of the use of Azolene biological preparation to reduce stress in plants of soft spring wheat of the Ekada 113 variety caused by drought and treatment with the herbicide Chistalan was evaluated. In a laboratory experiment, soil drought was artificially created, plants were sprayed with an aqueous emulsion of the herbicide (0.1% solution), an aqueous solution of the biological product, a mixture of equal quantities of solutions of the herbicide and the biological preparation. The field experiment was conducted in 2020–2021 in the Baymak district of the Republic of Bashkortostan, both years of the growing season were characterized by atmospheric and soil drought. In the field, the plants were treated once in the tillering phase with the herbicide Chistalan (0.7 l/ha) or the biological preparation Azolene (2.0 l/ha), or a tank mixture of the biological preparation and the herbicide. It was found that treatment with the biopreparation under stressful conditions led to activation of the antioxidant system of plants (a 1.4-fold decrease in the amount of malondialdehyde in leaves), reduced the suppression of root and shoot growth by 15.0–18.8% caused by the use of the herbicide. In the field, the application of the biological preparation (including in combination with the herbicide) caused an increase in the number of productive stems by 1.3–1.6 times and an increase in the number of grains in an ear by 1.3 times. In general, against the background of drought, the use of Azolen biological preparation increased wheat yields by 1.3 times, and the combined use of the herbicide treatment and biopreparation by 1.6 times. The obtained results gave reason to believe that the microbiological biological product can be used as an antidote that weakens the phytotoxic effect of herbicidal treatments, including in conditions of drought.
E. V. Kuzina (Wed,) studied this question.