Molecules 2013, 18(9), 10733-10746; doi:10.3390/molecules180910733
Article

Identification of Repellent and Insecticidal Constituents of the Essential Oil of Artemisia rupestris L. Aerial Parts against Liposcelis bostrychophila Badonnel

1 Department of Entomology, China Agricultural University, Haidian District, Beijing 100193, China 2 Analytical and Testing Center, Beijing Normal University, Haidian District, Beijing 100875, China 3 Department of Plant Pathology, China Agricultural University, Haidian District, Beijing 100193, China 4 State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China
* Authors to whom correspondence should be addressed.
Received: 22 July 2013; in revised form: 29 August 2013 / Accepted: 30 August 2013 / Published: 3 September 2013
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Abstract: The aim of this research was to determine the chemical composition and insecticidal and repellent activity of the essential oil of Artemisia rupestris L. aerial parts against the booklice Liposcelis bostrychophila Badonnel and isolation of insecticidal and repellent constituents from the essential oil. The essential oil of A. rupestris was obtained by hydrodistillation and analyzed by GC-MS. A total of 30 components of the essential oil of A. rupestris was identified and the principal compounds in the essential oil were α-terpinyl acetate (37.18%), spathulenol (10.65%), α-terpineol (10.09%), and linalool (7.56%), followed by 4-terpineol (3.92%) and patchoulol (3.05%). Based on bioactivity-guided fractionation, the four active constituents were isolated from the essential oil and identified as α-terpineol, α-terpinyl acetate, 4-terpineol and linalool. The essential oil of A. rupestris exhibited contact toxicity against L. bostrychophila with LD50 value of 414.48 µg/cm2. α-Terpinyl acetate (LD50 = 92.59 µg/cm2) exhibited stronger contact toxicity against booklice than α-terpineol (LD50 = 140.30 µg/cm2), 4-terpineol (LD50 = 211.35 µg/cm2), and linalool (LD50 = 393.16 µg/cm2). The essential oil of A. rupestris (LC50 = 6.67 mg/L air) also possessed fumigant toxicity against L. bostrychophila while the four constituents, 4-terpineol, α-terpineol, α-terpinyl acetate and linalool had LC50 values of 0.34, 1.12, 1.26 and 1.96 mg/L air, respectively. α-Terpinol and α-terpinyl acetate showed strong repellency against L. bostrychophila, while linalool and 4-terpinol exhibited weak repellency. The results indicate that the essential oil of A. rupestris aerial parts and its constituent compounds have potential for development into natural insecticides or fumigants as well as repellents for control of insects in stored grains.
Keywords: Liposcelis bostrychophila; Artemisia rupestris; contact toxicity; fumigant toxicity; repellency; essential oil composition

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MDPI and ACS Style

Liu, X.C.; Li, Y.P.; Li, H.Q.; Deng, Z.W.; Zhou, L.; Liu, Z.L.; Du, S.S. Identification of Repellent and Insecticidal Constituents of the Essential Oil of Artemisia rupestris L. Aerial Parts against Liposcelis bostrychophila Badonnel. Molecules 2013, 18, 10733-10746.

AMA Style

Liu XC, Li YP, Li HQ, Deng ZW, Zhou L, Liu ZL, Du SS. Identification of Repellent and Insecticidal Constituents of the Essential Oil of Artemisia rupestris L. Aerial Parts against Liposcelis bostrychophila Badonnel. Molecules. 2013; 18(9):10733-10746.

Chicago/Turabian Style

Liu, Xin C.; Li, Yin P.; Li, He Q.; Deng, Zhi W.; Zhou, Ligang; Liu, Zhi L.; Du, Shu S. 2013. "Identification of Repellent and Insecticidal Constituents of the Essential Oil of Artemisia rupestris L. Aerial Parts against Liposcelis bostrychophila Badonnel." Molecules 18, no. 9: 10733-10746.

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