2.2. Screening for bacteria producing volatile antimicrobials
All of the bacteria isolated from soil were tested for antagonistic activity in two-compartment plastic plates . For the fumigation assay against C. gloeosporioides, the PDA medium was poured into one side of the plates and the NA medium was poured into the opposing sector. Each isolated bacteria (50 lL; 1 _ 106 cfu mL_1) was innoculated on the NA medium side of the plate and incubated for 1 day at 37 _C. Subsequently, an agar plug (U 5 mm) of C. gloeosporioides was placed on the PDA sector. Sterile distilled water was used as the control factor instead of the isolated bacterial. The plates were sealed with parafilm, incubated for 5 days at 28 _C and the diameter of C. gloeosporioides expansion was measured. Each experiment was performed with three replications and the experiment was repeated three times.