Antimite activity of the essential oil from Cunninghamia lanceolata heartwood

摘要

The essential oil in the heartwood of Cunninghamia lanceolata was extracted and separated with a water steaming distillation method followed by column chromatography. Three major components, i.e., alpha-cedrene, alpha-terpineol, and alpha-cedrol, were obtained through identification by gas chromatography (GC) and gas chromatograph-mass spectrophotometry (GC-MS). They were then used to test their antimite activities against Dermatophagoides pteronyssinuss, D. farinae, and Blomia tropicatus. Results showed that cc-terpineol was generally the best at killing the 3 mites, and a-cedrol was most effective in killing D. pteronyssinuss. It was somewhat less effective against D. farinae, while a-cedrene was only promising for killing B. tropicatus. The essential oil of C. lanceolata heartwood is effective in suppressing D. pteronyssinuss and B. tropicatus.