Seasonal Variation of the Essential Oil of Artemisia campestris L.

Abstract The leaf oil isolated by hydrodistillation from aerial parts of Artemisia campestris L. (Asteraceae) collected from four areas of the south of Tunisia (Bengardane, Benikhdache, Jerba and Tataouine) at three periods of the year 1998 (April, August and November) have been analyzed by GC and GC/MS. β-Pinene (24.0–49.8%) was found to be the main component of this oil. Monoterpene hydrocarbons were shown to be the major fraction (58.8–88.6%), and mainly composed of β-pinene (24.0–49.8%), α-pinene (5.9–12.5%), p-cymene (3.4–9.4%), limonene (4.9–9.3%), (Z)-β-ocimene (0.2–5.5%) and γ-terpinene (2.0–6.5%). Oxygen-containing monoterpenes represented less than 10% of the total oil and was found to mainly contain geranyl propionate (1.6–4.4%), α-terpineol (0.6–2.2%) and terpinen-4-ol (0.7–1.9%). Sesquiterpenes ranged from 5.0% to 29.8%. γ-Muurolene (0.3–5.4%) and ω-cadinene (0.2–2.4%) were the major sesquiterpene hydrocarbons whereas spathulenol (1.2–8.9%) and β-eudesmol (1.0–6.4%) were the main oxygen-conta...