PURPOSE: A herbicide composition containing Palmarosa(Cymbopogon martini)-derived natural essential oil is provided to ensure high herbicidal activity. CONSTITUTION: A foliar herbicide composition contains Palmarosa(Cymbopogon martini)-derived natural essential oil. The natural essential oil contains volatile organic compounds of geraniol, citral, nerol, and geranyl acetate. A method for identifying high herbicidal function the natural essential oil comprises: a step of testing herbicidal function of the natural essential oil； a step of analyzing volatile organic compounds contained in the natural essential oil； a step of testing herbicidal function of detected volatile organic compound； a step of testing the herbicidal function of the natural essential oil in a greenhouse condition； and a step of testing the herbicidal function of the natural essential oil in a field condition.본 발명은 팔마로사(Cymbopogon martini) 유래의 천연정유를 포함하는 것을 특징으로 하는 경엽처리용 제초제 조성물을 제공한다.
