Acaricidal activities of some essential oils and their monoterpenoidal constituents against house dust mite, Dermatophagoides pteronyssinus (Acari: Pyroglyphidae).
The acaricidal activities of fourteen essential oils and fourteen of their major monoterpenoids were tested against house dust mites Dermatophagoides pteronyssinus. Five concentrations were used over two different time intervals 24 and 48 h under laboratory conditions. In general, it was noticed that the acaricidal effect based on LC(50) of either essential oils or monoterpenoids against the mite was time dependant. The LC(50) values were decreased by increasing of exposure time. Clove, matrecary, chenopodium, rosemary, eucalyptus and caraway oils were shown to have high activity. As for the monoterpenoids, cinnamaldehyde and chlorothymol were found to be the most effective followed by citronellol. This study suggests the use of the essential oils and their major constituents as ecofriendly biodegradable agents for the control of house dust mite, D. pteronyssinus.
Saad
El-Zemity
el-Z
Department of Pesticide Chemistry, Faculty of Agriculture, Alexandria University, Alexandria 21-545, Egypt. saad_elzemity@yahoo.com
Hussien
Rezk
R
Saher
Farok
F
Ahmed
Zaitoon
Z
D000818:Animals; D040002:Dermatophagoides pteronyssinus / Q000187:drug effects*; D039821:Monoterpenes / Q000494:pharmacology*; D009822:Oils, Volatile / Q000494:pharmacology*
D039821:Monoterpenes; D009822:Oils, Volatile