title: Repellent effect of santalol from sandalwood oil against Tetranychus urticae (Acari: Tetranychidae).
abstract: Thirty-four essential oils were screened for their repellent activities against the twospotted spider mite, Tetranychus urticae Koch (Acarina: Tetranychidae), at 0.1% concentration level using choice and no-choice laboratory bioassays. Of these, 20 essential oils showed significant repellencies against T. urticae in the choice tests. In subsequent no-choice tests using these 20 essential oils, only sandalwood oil showed significant repellency against T. urticae. Total number of eggs oviposited by T. urticae was significantly lower than controls in the choice tests when the kidney bean leaves were treated with 1 of 14 essential oils. The significant repellency of sandalwood oil against T. urticae lasted at least for 5 h at the 0.1% concentration level. Our GC-MS analysis indicated that the major components of the sandalwood oil were alpha-santalol (45.8%), beta-santalol (20.6%), beta-sinensal (9.4%), and epi-beta-santalol (3.3%). Santanol, a mixture of the two main components in the sandalwood oil, appears to be responsible for the repellency of sandalwood oil against T. urticae.
authors.affiliation: Division of Applied Life Science (BK21 Program)/Research Institute of Life Science, Gyeongsang National University, Jinju 660-701, Republic of Korea.
authors.forename: Hyun Sik
authors.initials: HS
authors.lastname: Roh
authors.forename: Kye Chung
authors.initials: KC
authors.lastname: Park
authors.forename: Chung Gyoo
authors.initials: CG
authors.lastname: Park
mesh_terms: D000818:Animals; D005260:Female; D008401:Gas Chromatography-Mass Spectrometry; D007302:Insect Repellents / Q000494:pharmacology*; D009822:Oils, Volatile / Q000494:pharmacology*; D010938:Plant Oils / Q000494:pharmacology; D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes / Q000494:pharmacology*; D040102:Tetranychidae / Q000187:drug effects* / Q000502:physiology
chemical_list: D007302:Insect Repellents; D009822:Oils, Volatile; D010938:Plant Oils; D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes; C043206:santalol; C076763:sandalwood oil