Essential oils extracted from aromatic plants have been considered as an important source of natural pesticides. The anti insect activity of essential oil hydrodistilled from lemongrass (Cymbopogon citratus) was tested against the rubber litter beetle, Luprops tristis under laboratory conditions. Repellent activity of various doses (2, 4, 8, 16 μl ) of essential oil from C. citratus against L. tristis adults during different time periods (0.5 h, 1 h, 2 h, 4 h and 8 h) was performed by area preference method. The assays revealed the pest insects’ behavioral responses towards the volatile components of essential oil from test plant. Results indicated that the oil exhibited potent repellent activity against L. tristis adults. All doses of essential oil showed significant repellent activity against L. tristis adults (P<0.001) [df=3; F=104.523]. The difference among different times of exposure (P<0.001) [df=4; F=82.028] was also highly significant. The chemical constituents of the essential oil were analyzed by gas chromatography–mass spectrometry
