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Repellency of lavender oil and linalool against spot clothing wax cicada, Lycorma delicatula (Hemiptera: Fulgoridae) and their electrophysiological responses

Yoon, Changmann, Moon, Sang-Rae, Jeong, Jin-Won, Shin, Youn-Ho, Cho, Sun-Ran, Ahn, Ki-Su, Yang, Jeong-Oh, Kim, Gil-Hah
Journal of Asia-Pacific entomology 2011 v.14 no.4 pp. 411-416
acetates, peanuts, sage, essential oils, chromatography, Mentha pulegium, mass spectrometry, antennae, adults, fennel, nymphs, synergism, females, olfactometers, Lavandula, chamomile, oils, Mentha piperita nothosubsp. piperita, electrophysiology, linalool, Cymbopogon, Fulgoridae, instars, Cicadidae
This study was performed to investigate the repellent effect of 5μl doses of ten essential oils (bergamot, chamomile, clary sage, fennel, lavender, lemongrass, majoram, peanut, pennyroyal, and peppermint) against Lycorma delicatula 4th nymphs using an olfactometer. Only lavender oil exhibited significant repellency. We then tested 10, 5, 2.5, and 1μl doses of lavender oil against the nymphs and females of L. delicatula. The oil showed significant repellency at 10 and 5μl, although the latter is less potent to 1st instar nymphs. At the lavender oil dose of 2.5μl, only 3rd and 4th instar nymphs and females were significantly affected. None of the stages tested were affected by 1μl. Chromatographic and mass spectrometric analyses of lavender oil detected linalool (42.2%), linalyl acetate (49.4%), terpinen-4-ol (5.0%), and caryophyllene oxide (3.4%). Among the four main components, only linalool showed repellency to all instar nymphs and females. No synergism was detected. Antennae of all instar nymphs and females showed electrophysiological responses only to linalool. In field studies using linalool, 4th nymphs and adults were highly repelled at a dose of 30μl of lavender oil. The effect differed according to test plot and treatment dose.