|Reference : Chemical composition and acaricidal properties of Devera scoparia essential oil (Aralial...|
|Scientific journals : Article|
|Physical, chemical, mathematical & earth Sciences : Chemistry|
Life sciences : Environmental sciences & ecology
Life sciences : Entomology & pest control
|Chemical composition and acaricidal properties of Devera scoparia essential oil (Araliales: Apiaceae) and blends of its major constituents against Tetranychus urticae (Acari: Tetranychidae)|
|Attia, Sabrine [ > > ]|
|Grissa, K. L. [ > > ]|
|Lognay, Georges [Université de Liège - ULg > Chimie et bio-industries > Chimie analytique >]|
|Heuskin, Stéphanie [Université de Liège - ULg > Chimie et bio-industries > Chimie analytique >]|
|Mailleux, A.-C. [ > > ]|
|Hance, Th. [ > > ]|
|Journal of Economic Entomology|
|Entomological Society of America|
|[en] essential oil ; Devera scoparia ; Tetranychus urticae ; toxicity ; fecundity|
|[en] The essential oil of Deverra scoparia Coss. & Durieu was investigated for its acaricidal
activity against the worldwide pest twospotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae).
The essential oil was analyzed by fast gas chromatography (GC) and GC-mass spectrometry.
The activities of its individual and blended constituents were determined. Our study showed
that female mortality increased with increasing D. scoparia oil concentrations, with LD50 and LD90
values at 1.79 and 3.2 mg liter 1, respectively. A reduction in fecundity had already been observed
for concentrations of 0.064, 0.08, and 0.26 mg liter 1 D. scoparia essential oil. Ten major components,
comprising 98.52% of the total weight, were identiÞed; -pinene was the most abundant constituent
(31.95%) followed by sabinene (17.24%) and 3-carene (16.85%). The 10 major constituents of D.
scoparia oil were individually tested against T. urticae females. The most potent toxicity was found with
-pinene, 3-carene, and terpinen-4-ol. The presence of all constituents together in the artiÞcial
mixture caused a signiÞcant decrease in the number of eggs laid by females, at 0.26mgliter 1 (11 eggs),
compared with the control (50 eggs). The toxicity of blends of selected constituents indicated that
the presence of all constituents was necessary to reproduce the toxicity level of the natural oil.
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