3.4 Geraniol inhibits the mycelial growth of fungi in vitro
Experiments were carried out to evaluate the ability of geraniol to inhibit the growth of Neopestalotiopsis sp. and C. gloeosporioides in vitro . Geraniol inhibited the mycelial growth of the two pathogenic fungi. The mycelial growth of both fungi was dose-dependent in vitro (Figure 3). Geraniol concentrations from 0.125 µL/mL to 1.0 µL/mL limited the mycelial growth of C. gloeosporioides (Figure 3A and 3C). The mycelial growth ofNeopestalotiopsis sp. was strongly inhibited by geraniol concentrations from 0.0625 µL/mL to 0.5 µL/mL (Figure 3B and 3D). In addition, the MIC50 of geraniol againstNeopestalotiopsis sp. and C. gloeosporioides was 0.29 µL/mL and 0.42 µL/mL, respectively (Figure 3E), indicating that geraniol more strongly inhibited the mycelial growth ofNeopestalotiopsis sp. compared with C. gloeosporioides .