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.

Clove Oil Efficacy on the Red Spider Mite, Oligonychus coffeae Nietner (Acari: Tetranychidae) Infesting Tea Plants

“…The ovipositional deterrence test of clove oil solution was made according to the choice tests method described by Roh et al (2012Roh et al ( , 2013 and with slight modification. Tea leaf discs (mature TV1) were placed with the upper surface upwards in petri-dish lined with moist cotton wool.…”

Effect of the extract and compound from Solanum nigrum Linn on Tetranychus cinnabarinus

“…), serving as repellents (Roh et al. ; Nyalala et al. ) or deterring or modifying oviposition (Roh et al.…”

“…Furthermore, the use of natural products can be considered an important alternative for controlling mites because such products can affect mite behaviour in several ways, including disrupting major metabolic pathways, causing rapid death, acting as fumigants (Cavalcanti et al 2010;Oh et al 2014), contact acaricides (Miresmailli et al 2006;Laborda et al 2013), serving as repellents (Roh et al 2012;Nyalala et al 2013) or deterring or modifying oviposition (Roh et al 2011;Attia et al 2012b). They may also retard or accelerate development or interfere with the life cycle of insects in other ways (Attia et al 2013).…”

Recent Developments in Pharmaceutical and Therapeutic Applications of Sandalwood Oil

“…Santanol, a mixture of the two main components in the sandalwood oil, appears to be responsible for the repellency of sandalwood oil against Tetranychus urticae. [37] Sandalwood essential oils, as well as purified α-santalol and β-santalol, are capable of significantly suppressing the expression of specific pro-inflammatory signaling molecules in co-cultures of stimulated skin cells. Inflammation, and associated discomfort, is a hallmark of many skin conditions and diseases and there is a need for better methods of safely and effectively reducing or preventing inflammation.…”