Abstract: Multiphase agricultural composition in the form of a suspo-emulsion, comprising lipophilic droplets containing a mixture of phytosterols, said lipophilic droplets being dispersed in an aqueous phase, the composition further comprising: at least one first surfactant (SF1) located at the interface of the lipophilic droplets and of the aqueous phase and selected from among the SFs that are soluble in the aqueous phase (WATER SF1) and the SFs that are soluble in the lipophilic droplets (OIL SF1); and at least one second surfactant (SF2) suspended in the aqueous phase, said second surfactant having the form of particles insoluble in the aqueous phase.

Abstract: The invention relates to a method of preventive treatment of a cultivated plant to limit the loss of dry matter linked to abiotic and/or biotic stress, consisting of applying to the plant, before the appearance of said abiotic and/or biotic stress, a slurry comprising: water; and a base, said base comprising at least one surfactant and a mixture of phytosterols comprising ?-sitosterol.