Biotransik i180 PS – a bio-preparation intended for use in agriculture. It is applied by treating seeds to ensure plant protection at the sowing stage. The active ingredient of the preparation is Cladosporium tenuissimum strain SYM01272, present at a concentration of not less than 1.0*10^5 IU/g. The preparation is applied once to treat sunflower seeds at a dose of 36–100 g per 100 kg of seeds. The manufacturer of the preparation is Indigo Ag, Inc., located in the USA. The preparation is in the form of a bio-preparation and can be used as a seed treatment. Using Biotransik i180 PS allows increasing plant resistance to stress and improving overall yield.