Abstract
Abstract: In this study, the insecticidal effect of the ethanol extract of Areca catechu against the house dust mite, Der-mtophagoides pteronysinus, was examined. Ethanolic Areca catechu extract was directly applied at different concen-trations (1.0, 0.5, 0.25, 0.125, 0.0625 mg/40 µl) and then allowed an exposure of 24 hours. The 1.0 mg/40 µl and 0.5 mg/40 µl concentrations of Areca catechu ethanol extract produced mortality rates of 100% and 98%, respectively, againsthouse dust mite, Dermtophagoides pteronysinus. Areca catechu ethanol extract at a concentration of 0.125 mg/40 µlproduced a 50% insecticidal effect. These results proved the insecticidal effect of Areca catechu ethanol extract againsthouse dust mite, Dermtophagoides pteronysinus. To check for the presence of the recognized insecticidal arecoline andmonoterpene compounds in Areca catechu, gas chromatography-mass spectrometry and thermal desorption-gas chro-matography/mass spectrometry were performed. As a result, arecoline and ten monoterpene compounds were identi-fied in Areca catechu.Keywords: insecticidal effect, house dust mite, Areca catechu, ethanol extract, gas chromatography-mass spectrometry,thermal desorption-gas chromatography/mass spectrometry
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