نوع مقاله : مقاله کامل، فارسی
نویسندگان
گروه گیاهپزشکی، دانشکده کشاورزی، دانشگاه بوعلیسینا، همدان، ایران
چکیده
چکیده تصویری
)
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The aims of the present study, therefore were to: 1) determine essential oil yield and chemical composition of Myrtus communis L. (Myrtaceae), Foeniculum vulgare Mill. (Apiaceae), Eucalyptus globulus Labill. (Myrtaceae) and Pistacia atlantica Desf. (Anacardiaceae) essential oils by gas chromatography–mass spectrometry (GC–MS) at two different phenological stages and 2) evaluate durability and 3) fumigant toxicity of above-mentioned essential oils and their binary combinations against two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) eggs and adults. The essential oils yields (w/w %) varied between 0.69% for M. communis at vegetative stage and 1.27% for F. vulgare at full flowering stage. At full flowering stage, 23, 24, 34, and 17 components were identified in essential oils of P. atlanticae, E. globulus, M. communis and F. vulgare, respectively. Oxygenated monoterpenes and monoterpene hydrocarbons constituted the majority of chemical classes in essential oils of the studied plants. Among the oils tested, the most toxic essential oils against adults and eggs of T. urticae were M. communis (LC50= 3.95 μL L−1 air) and F. vulgare (LC50= 0.91 μL L−1 air), respectively. The LC50 values for the binary mixtures of essential oils ranged between 0.75 to 3.23 μL L−1 and between 3.78 to 6.84 μL L−1, for T. urticae eggs and adults, respectively. Based on the synergistic factor and dose reduction index, the most promising binary mixtures to T. urticae eggs and adults was E. globulus EO: P. atlantica EO. The essential oils of M. communis, E. globulus, F. vulgare and P. atlantica caused 71%, 69%, 61% and 51% mortality at 3th day exposure, respectively. While no mortality was recorded at 9th day exposure for all plant essential oils. Such a this fast initial release could reduce the toxicological effects expected to the each essential oils.
کلیدواژهها [English]
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