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Spray Adulticidal Effects of Plant Oils against Culex pipiens pallens (Diptera: Culicidae)
- 언어ENG
- URLhttps://db.koreascholar.com/Article/Detail/291435
We examined the adulticidal activity of 34 plant essential oils when they were sprayed on female Culex pipiens pallens adults. At concentrations of 1000 ppm, four oils, namely, cardamon, coriander, rosemary, and sandalwood, had adulticidal activities ranging from 67.8% to 98%. Sandalwood oil had the highest adulticidal activity with an LC50 value of 445ppm. Gas chromatographic (GC) and GC-mass spectrometric analyses revealed that the major constituents of cardamon were 1,8-cineole, α-terpinolene and α-terpinene; those of coriander were γ-terpinene, camphor, linalool and geranyl acetate; those of rosemary were β-pinene, 1,8-cineol, camphor and linalool; and those of sandalwood were α-santalol (69.4%) and β-santalol (15.3%). Both of the major components of sandalwood had the highest adulticidal activity of all the monoterpenes tested. When inhibitors of enzymes known to promote insecticide resistance were mixed with each of the four essential oils, a synergistic effect was only observed when sandalwood was mixed with 100 ppm PBO, which enhanced the adulticidal activity of 500 ppm sandalwood from 41% to 90%.
