GC-MS Analysis of the Essential Oil from Seseli mairei H. Wolff (Apiaceae) Roots and Their Nematicidal Activity

The essential oil (EO) was extracted from aerial parts with insecticidal and fungicidal activity. Herein, the hydro-distilled essential oils ofSeseli maireiH. Wolff roots were determined by GC-MS. A total of 37 components were identified, (E)-beta-caryophyllene (10.49%),β-geranylgeranyl (6.64%), (E)-2-decenal (6.17%) and germacrene-D (4.28%). The essential oil ofSeseli maireiH. Wolff had nematicidal toxicity againstBursaphelenchus xylophiluswith a LC50value of 53.45 μg/mL. The subsequent bioassay-guided investigation led to the isolation of three active constituents: falcarinol, (E)-2-decenal, and octanoic acid. The falcarinol demonstrated the strongest toxicity againstB. Xylophilus(LC50= 8.52 μg/mL). The octanoic acid and (E)-2-decenal also exhibited moderate toxicity againstB. xylophilus(LC50= 65.56 and 176.34 μg/mL, respectively). The LC50of falcarinol for the toxicity ofB. xylophiluswas 7.7 and 21 times than that of octanoic acid and (E)-2-decenal, respectively. Our findings demonstrate that the essential oil fromSeseli maireiH. Wolff roots and their isolates may be developed as a promising natural nematicide.Keywords:Seseli maireiH. Wolff;Bursaphelenchus xylophilus;falcarinol