Thirteen plant essential oils were tested for their repellent activity against the bean bug Riptortus clavatus. Among the tested oils, caraway (100%) and clove bud oil (92%) significantly repelled the bean bugs at a dose of 0.142㎕/cm2 by using a Y-tube olfactometer. GC and GC-MS analyses revealed that the active components responsible for the effective repellency of caraway and clove bud oil were carvone (75%) and limonene (76.9%); eugenol (100%), isoeugenol (54.3%) and β-caryophyllene (60.0%), respectively. Of the different active fractions, eugenol was the most significant one than the other components with reference to repellent activity against the bean bugs. In the GC-EAD, limonene and carvone of caraway oil were responded to the antenna of Riptortus clavatus.

• Jeong-Oh Yang(Dept. of Plant Medicine, Chungbuk National University)
• Yun-Hee Kwon(Dept. of Plant Medicine, Chungbuk National University)
• Changmann Yoon(Dept. of Plant Medicine, Chungbuk National University)
• Gil-Hah Kim(Dept. of Plant Medicine, Chungbuk National University)