Abstract: The volatiles in the barks of ten poplar species, namely Populus×xiaozhuanica W. Y. Hsu et Liang cv. ‘Baicheng-2’, P. simonii Carr. ×P. nigra L., P. russkii Jabl., P. berolinensis Dipp., P. pseudo-simonii Kitag., P. pseudo-simonii Kitag. ×P. nigra L., P. ussuriensis Kom., P. stalintz Jabl., P. alba L. ×P. berolinensis Dipp., and P. simonii Carr., were steam-distillated, and their qualitative and quantitative analyses were made with gas chromatography-mass spectrometry (GC-MS). Salicylaldehyde, linolein acid, and 11,14,17-eicosatrienoic acid methyl ester were the common components in the volatiles. Different poplar species had greater differences in the components of their volatiles and in the relative contents of aldehyde, ester, and hydrocarbon. Phenol, camphor, and δ-cadinene were the specific components. The behavioral responses of male and female Xylotrechus rusticus L. to the volatiles at the doses of 20, 60, 90, 120, 150 and 180 μl were observed with Y-tube olfactometer, and it was indicated that male adults had significant differences in the choice rate to the volatiles at the doses of 120, 150, or 180 μl (P<0.05), while female adults had the differences at the doses of 60, 90, or 120 μl (P<0.05). The test of the behavioral responses of male and female X. rusticus to 200 μl volatiles of poplar barks and to 20 g scraps of different poplar species by using wind tunnel technique indicated that for the females, their choice rate to the scraps was significantly different (P<0.05), but the choice rate to the volatiles had no significant difference (P>0.05). For the males, the choice rate to the volatiles was significantly different (P<0.05), while the choice rate to the scraps had lesser difference (P>0.05). The potential active chemical substances and related poplar species were discussed, based on the significant differences in the choice rate of X. rusticus to the volatiles of different poplar barks.

Key words: Avicennia marina, Artificial wetland system, Cadmium, Distribution, Migration, Purifying effect