关键词: 绿豆象, 绿豆, 植物挥发物, 触角电位, 行为反应

Abstract: 【Aim】 This study aims to investigate the plant volatiles attracting Callosobruchus chinensis. 【Methods】 The electroantennogram and behavioral responses of C. chinensis adults to volatiles from mung bean (Vigna radiata) pods were tested by using electroantennographic (EAG) detector and Y-tube olfactometer， respectively. 【Results】 The EAG bioassay results showed that the respective EAG values of mated female adults of C. chinensis to 23 tested volatiles from V. radiata pods were different， among which the EAG values to benzaldehyde， 2-hexenal， caproaldehyde， octanal and salicylaldehyde were relatively high， with the maximum value (20.68) to 2-hexenal. EAG values showed that the antennal response strengthened with the increasing of concentration of the test componds， but the EAG values had no significant difference between mated and unmated adults. The results of behavioral response tests showed that the mated male and female adults of C. chinensis showed significantly positive taxis to benzaldehyde and 2-hexenal and significantly negative taxis to caproaldehyde， whereas showed no significant taxis to octanal and salicylaldehyde when the concentrations of these five compounds were 100 μg/μL. 【Conclusion】 Among volatiles from V. radiata pods， benzaldehyde and 2-hexenal may be the main attractants for C. chinensis.

Key words: Callosobruchus chinensis, Vigna radiata, plant volatiles, electrophysiological response, behavioral response