Abstract: The Potosia brevitasis Lewis belongs to the family cetoniidae of coleoptera.It is distributed throughout China,and has a wide host range.Objective To better understand differential responses of female and male adults of P.brevitasis to alcohols and aldehydes with different carbon chain-length and unsaturation.Method A total of 33 compounds were chosen for electrophysiological response test using electroantennography technique.ResultThe results showed that Hexanol,Heptanol,Octanol,Nonanol,(Z)-3-Hexenol,(Z)-2-Hexenol elicited significant EAG responses.At the same dose,the females always displayed stronger responses than males.Furthermore,the responses to primary,secondary,and tertiary alcohols decreased gradually.The saturated aldehydes with 6 to 9 carbon chain-length elicited significant EAG responses,among which,the 8 carbon aldehyde octanal the EAG reaction value was the largest.Conclusion The EAG responses of volatile alcohols and aldehydes in female adults was higher than in male adults.