Abstract: Object:To study anti-Aspergillus flavus effect of cinn. and citral.Method:To count germinating spores and touse scanning electron microscope. Result:After the treatment of cinn.and citral 4h,germinating spores were obviouslydecreased at concentration≥0.05μg/ml (cinn. )or 0.28μg/ml (citral). The morphology and ultrastructure of hypha and sporeshowed obvious changes compared with the controls. Conclusion:The results showed that cinnamaldehyde and citral couldinhibit the germination of spores obviously .The anti- Aspergillus flavus mechanism of cinn. and citral might involve ultrastructuraldamage.

Key words: cinnamaldehyde, citral, Aspergillus flavus, germination of spore, scanning electron microscope