Seed treatment was done using a suspension of B. subtilis (strain 160) at 1 108 cells/mL, obtained from a 60 h PDB culture by infiltration into the seeds using a vacuum. The control seeds were infiltrated with an equal volume of PDB without the bacteria, diluted in water at the same proportion as the suspension of B. subtilis. The sensitivity of B. subtilis to the insecticide Poncho 600 FS was tested as follows: 5 seeds treated with insecticide and B. subtilis were sown in plates with PDA and incubated at 28 C for 48 h. Development of the bacteria was observed.