FIELD: agriculture.
SUBSTANCE: method involves extracting larch and/or fir wood with organic solvent; distilling extractant for producing of aqueous emulsion of total of biologically active natural compounds. Organic solvent used is aliphatic alcohol with 1, 2, 3 carbon atoms, or acetone containing water not in the excess of 60 wt%, or mixture of these extractants. After distilling of extractant, active substance is produced, said substance being based on total of flavonoids of the following composition, wt%: dihydroquercetinic acid 70-86; dihydrokaempferol 4-12; naringenin 2-6; other compounds being the balance. Claimed preparation is preferably used in the form of aqueous emulsion comprising 2-10 wt% of active substance.
EFFECT: increased biological activity of preparation.
2 cl, 3 ex
