Translator Disclaimer
1 October 2011 Bioefficacy of Alpinia galanga (Zingiberaceae) Rhizome Extracts, (E) -p- Acetoxycinnamyl Alcohol, and (E) -p-Coumaryl Alcohol Ethyl Ether Against Bactrocera dorsalis (Diptera: Tephritidae) and the Impact on Detoxification Enzyme Activities
N. Sukhirun, W. Pluempanupat, V. Bullangpoti, O. Koul
Author Affiliations +
Abstract

The application of insecticides to control oriental fruit fly, Bactrocera dorsalis Hendel (Diptera: Tephritidae), is a principal component of the current management of these fruit flies. However, we evaluated four extracts Alpinia galanga Wild Linn (Zingiberaceae) rhizomes against adult flies and found hexane and ethanol extracts to be most effective (LC50 = 4,866 and 6,337 ppm, respectively, after 24 h). This suggested that both nonpolar and polar compounds could be active in the candidate plant. Accordingly, the hexane extract was further processed to isolate nonpolar active compounds from this plant source. Two compounds, (E)-p-acetoxycinnamyl alcohol and (E) -p-coumaryl alcohol ethyl ether, were identified as active ingredients and found to be more active than total hexane extract (LC50 = 3,654 and 4,044 ppm, respectively, after 24 h). The data suggested that the compounds were not synergistic but may have some additive effect in a mixture. The activity of the hexane extract against detoxification enzymes, carboxylesterase (CE) and glutathione transferase (GST) also was determined in vitro. CE was inhibited by 70%, whereas GST was not significantly inhibited. Insect CEs mediate insecticide resistance via their induction; therefore, inhibition of these enzymes by plant allelochemicals could be a useful alternative approach for the management of the pest in the field.

© 2011 Entomological Society of America
N. Sukhirun, W. Pluempanupat, V. Bullangpoti, and O. Koul "Bioefficacy of Alpinia galanga (Zingiberaceae) Rhizome Extracts, (E) -p- Acetoxycinnamyl Alcohol, and (E) -p-Coumaryl Alcohol Ethyl Ether Against Bactrocera dorsalis (Diptera: Tephritidae) and the Impact on Detoxification Enzyme Activities," Journal of Economic Entomology 104(5), 1534-1540, (1 October 2011). https://doi.org/10.1603/EC11080
Received: 12 March 2011; Accepted: 1 June 2011; Published: 1 October 2011
JOURNAL ARTICLE
7 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

Share
SHARE
KEYWORDS
Alpinia galanga
Bactrocera dorsalis
carboxylesterase
glutathione transferase
toxicity
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top