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The essential oils of leaves, fruits, flowers, stems and twigs of Litsea cubeba were extracted by hydrodistillation. A total of 53, 50, 76, 94 and 90 compounds were identified from the leaf, fruit, flower, stem and twig oils, respectively, and their yields were 13.9 ± 0.09, 4.0 ± 0.03, 10.4 ± 0.05, 0.09 ± 0.01 and 0.4 ± 0.02 mL/100 g of the oven-dried (o.d.) materials, respectively. The main component in the leaf, flower and twig oils was 1,8-cineole, whereas in the fruit oil it was citral, and in the stem oil limonene, citronellal, and citronellol. When tested for their antibacterial activities using the paper disc diffusion method, oils from all parts showed excellent activities, particularly the fruit oil. When the oils were infused onto filter paper and tested for their antimicrobial paper capability according to the JIS L1902 method, the fruit oil exhibited excellent antimicrobial activities. Citral was deemed the main cause of the antimicrobial activity. With the multiplicity of contagious diseases and their prevalence in hospitals, these essential oils present a potentially good choice as antibacterial agents. We think that the essential oils of this species are capable of multipurpose applications.

Essential Oil Compositions and Antimicrobial Activities of Various Parts of Litsea cubeba from Taiwan