The mixture compound extracted by supercritical carbon dioxide extraction can attracted the insect directly,which was the new approach to search after the attractant. Volatiles could be used to bioassay. Results of behavior responses of Anoplophora glabripennis to the volatiles extracted from Acer mono under different pressure and temperature showed that extracts of 25 MPa, 35 ℃ was attractive to A. glabripennis significantly than others. Extracts of 25 MPa, 35 ℃ was the optimum supercritical fluid extraction(SFE) condition. The analysis of GC-MS showed that the main compound were 3-hexenol and ethyl acetate.
The volatiles of Platycladus orientalis L.’s phloem were extracted by a simple distillation technique and a Sohlet’s extraction method,respectively,and analyzed by GC-MS.The results showed that the volatiles consisted of monoterpene,sesquiterpene and ethanols,aldehydes,esters and et al.For extracts by Sohlet’s extraction,the major compounds were the high boiling point chemicals such as ethanols,aldehydes,esters and et al;for extracts by simple distillation method,sesquiterpenes were the major part.The simple distillation method was easy to operate and low-cost,and was suitable for extracting volatiles for forest insect attractant.
