[Insecticidal activity of Bacillus thuringiensis cells]. / Entomotsidnaia aktivnost' bakterial'nykh kletok Bacillus thuringiensis.

The influence of sixteen different nutrient media on the entomopathogenic activity of three Bacillus thuringiensis strains was studied. The medium composition based on potato, yeast extract, and molasses was optimized. B. thuringiensis No 1 grown on the media No 7 and 9 displayed the highest entomopathogenic activity (94.3 and 90.6%, respectively).