Abstract: To find whether there is attraction between the male and female of Cyrtotrachelus buqueti Guerin-Meneville and the influence of the host plant on the behavior of the male and female, Y-tube olfactometer was used to determine the behavioral reaction of adult female and male to the volatiles of their bodies and the host plant after different treatments, and the EAG responses of different portions of antenna of C. buqueti to different combinations of their bodies extracts （female and male） and the volatiles of the host plant. The results showed that the volatiles of the female adult had higher luring activity to the male adult but had repelling action to the female adult, and that of the male adult had certain luring activity to the female adult. The behavioral and electrophysiological responses of female and male adults to the combined odour from their bodies and bamboo shoots were obviously stronger than those to the corresponding volatiles of their bodies only. The EAG response tests showed that the EAG values of different antennal parts to the volatiles from different body parts of C. buqueti adults were obviously different, and the EAG responses of the terminal portion of the antenna to the different combinations of beetle body extracts and the volatiles of the host plant were significantly different （P＜0.01）. Adults showed the excitement to the extracts of the adult male or female bodies when touched by a glass rod dipped with the extracts, and the excitement rate of female was 6.67%, while that of the male was 26.67%. The results suggest that the pheromones exist in C. buqueti. The pheromones from the female has great allure to the male of the same species and that from the male also has allure to the female of the same species, while the host plant could strengthen the allure between the female and the male.

Key words: Cyrtotrachelus buqueti, Neosinocalamus affinis, plant volatiles, body volatiles, EAG response, behaviorial response, Y-tube olfactometer