Essential oil from a variety of sources has been proven to be effective antimicrobial for the past decades. However, its efficacy when applied to the food system is a major consideration. This study aimed to evaluate the antimycotic property of lemon grass (Cymbopogon citratus Stapf.) essential oil (LGEO) and its effect on the microbial stability and quality of ready-to-drink (RTD) moringa (Moringa oleifera Lam.) beverage. Results showed that LGEO is an effective antimycotic agent and a potential natural preservative in RTD moringa beverage.