FIELD: plant growing, agrochemistry. SUBSTANCE: it is suggested preparation to treat plants, method for its obtaining due to gradual extraction out of Mortierella nigrescens micromycete biomass with nonpolar extragent in supercritical state, water, alkali, water, acid, water, alkali and water with subsequent combination of solid residue with the first extract, and, also, the method to treat plants at manufacturing plant production dealing with impact of the above mentioned product upon plants. The innovation enables to widen action spectrum of obtained product for treating plants and extend raw material basis, increase coefficient of raw material usage in manufacturing said product for treating plants and efficiency of plant production manufacturing. EFFECT: higher efficiency. 8 cl, 2 ex
