2.7. Antifungal assay of artificial mixture of identified volatile
compounds
A constructed mixture was made by using authentic standard
chemicals based on the volatile profile determined from live cultures.
The proportion of each positively identified compound was
calculated from the relative peak areas (2-nonanone: b-benzeneethanamine:
2-methylpyrazine: 2-decanone: thymol = 1:2:10:10:1;
V/V). A 5 mm diameter agar plug with C. gloeosporioides was placed
on PDA, and on the other plate, different amounts of the constructed
mixture were added. Then the two lidless plates were
sealed with parafilm. After 7 days incubation at 28 C, the colony
diameter was assessed. Three replications of each treatment were
performed and the experiment was repeated three times.