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1 April 2011 Isolation and Identification of Acaricidal Compounds in Inula japonica (Asteraceae)
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Abstract

We identified acaricidal compounds in Inula japonica Thunberg (Asteraceae) that were effective against carmine spider mite, Tetranychus cinnabarinus (Boisduval). Petroleum-ether extracts from I. japonica were toxic to T. cinnabarinus, with a 50% lethal concentration (LC50) value of 1.18 mg/ml. Silica gel column chromatography was used to separate the acaricidal components. Seventeen of 38 fraction groups had mite mortality rates >50%, nine fraction groups had rates >60%, and three fraction groups had rates >80% at 2 mg/ml. The major volatile compounds in the bioactive fraction groups were identified by gas chromatography-mass spectroscopy, and β-sitosterol (1), stigmasterol (2), lupeol (3), and α-amyrin (4) were identified and determined to have acaricidal activity against T. cinnabarinus in vitro.

© 2011 Entomological Society of America
D. D. Duan, C. Y. Bu, J. Cheng, Y. N. Wang, and G. L. Shi "Isolation and Identification of Acaricidal Compounds in Inula japonica (Asteraceae)," Journal of Economic Entomology 104(2), 375-378, (1 April 2011). https://doi.org/10.1603/EC10129
Received: 8 April 2010; Accepted: 1 February 2011; Published: 1 April 2011
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