Insecticidal and repellent activity of sandalwood oil (Santalum austrocaledonium) and its components was tested against cotton aphid , Aphis gossypii in laboratory and field. The activity was estimated by calculating survival rate of aphid after application of sandalwood oil and its components. Analysis by gas chromatography-mass spectrometry led to identification of 5 compounds, alpha-santatol, bergamotol, epi-beta-santalol, and beta-satalol. The components of sandalwood oil was isolated by column chromatography for testing insecticidal and repellent activity. Santalol showed strong insecticidal and repellent activity as a commercial insecticide, imidachloprid. Sandalwood oil and isolated alpha-santatol and beta-santatol also showed strong insecticidal and repellent activity, however there was no significant difference among them.

• Junheon Kim(Department of Applied Biology, Gyeongsang National University)
• Hyun Sik Roh(Department of Applied Biology, Gyeongsang National University)
• Eun Sik Shin(Disivion of Applied Life Science (BK21 program)/Institute of Agriculture and Life Sciences, Gyeongsang National University)
• Chung Gyoo Park(Disivion of Applied Life Science (BK21 program)/Institute of Agriculture and Life Sciences, Gyeongsang National University, Department of Applied Biology, Gyeongsang National University)