Brown planthopper (BPH), Nilaparvata lugens (Stål) is an economically important insect pest of rice. This research study aimed to compare the efficiency of essential oil (EO) and nano essential oils (nEO) of star anise,(Illicium vercum (Hook. f.)) and lemon glass (Cymbopogon citratus (Dc. exNees)) against BPH and compared to essential oil mixed with tween used as surfactant at doubling concentration (EO2T). Contact toxicity was performed by applying the EOs at 0.0, 0.02, 0.04, 0.06, 0.08 and 0.1% concentrations into the plate which released 20 BPH adult. Then the insect mortality was observed at 12 and 24 hours. As for repellent activity, choice test was used when EOs at 0.02, 0.06 and 0.1% concentrations were applied to 20 BPH released in rice cage and compared with control surfactant. The results revealed that at 12 hours, both EO2T and nEO of plants were highly effective in killing BPH adult. EO2T of star anise showed the highest effective caused 100% mortality at 0.1% concentration with LC50 at 0.028%, followed by nEO of star anise, EO2T of lemon glass and nEO of lemon glass, which gave LC50 at 0.032, 0.042 and 0.044%, respectively. For the repellent efficiency test, 0.02% nEO of lemon glass showed the most repellent effect to adult, with 43.83% RI. As for the toxicity at 24 hours, all EOs and nEOs had extremely effective in killing BPH adults. Those EO2T and nEO of star anise presented LC50 values at 0.025 and 0.031%, respectively. The nEO of lemon glass with 0.02% concentration, showed the most repellent effect to BPH adults, gave their% RI at 32.27%.