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.