EAG responses of adult Cnaphalocrocis medinalis to plant volatiles
Author of the article:WEI Bo;GAO Hui-Ying;ZHENG Xu-Song;XU Hong-Xing;RUAN Yong-Ming;Lü Zhong-Xian;ZHU Ping-Yang
Author's Workplace:College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China; Institute of Plant Protection and Microbiology, Zhejiang Academy of Agriculture Sciences, Hangzhou 310021, China
Key Words:Cnaphalocrocis medinalis; physiological state; plant volatile; concentration; EAG response
Abstract:
[Objectives] To investigate the electroantennogram (EAG) responses of adult Cnaphalocrocis medinalis to 8 plant volatiles
in order to develop efficient attractants for this species. [Methods] The EAG responses of adult C. medinalis moths to different
concentrations of the plant volatiles benzaldehyde, phenylacetaldehyde, linalool,
heptanol, hexanal, methyl salicylate, cis-3-hexenal and benzyl acetate, were
measured in both sexes, in mated and unmated individuals and in individuals
feeding on honey-water and those feeding on water. [Results] The EAG responses of males to plant volatiles were stronger than
those of females and unmated females and males were more responsive to plant
volatiles than mated moths. Unmated females and males provided with honey water
were more responsive to plant volatiles than those provided with only water.
500 g/L hexanal elicited the strongest EAG responses from unmated male moths
provided with ether honey-water or water. However, 100 g/L hexanal elicited the
strongest EAG responses from mated female and unmated male moths provided with
honey-water. 500 g/μL phenylacetaldehyde elicited the strongest EAG responses
in mated male moths feeding on honey water. [Conclusion] EAG responses of C. medinalis to
eight different plant volatile varied with the concentration of the
volatile in question, with the sex of the moth, its mating status and whether
it was feeding on honey-water or water. C. medinalis is most sensitive
to hexanal but phenylacetaldehyde can also induce strong EAG responses from
unmated female and male moths.