Abstract
The essential oils from four Artemisia herba alba populations collected in Israel were investigated for their antibacterial and antispasmodic activities. All the oils had slight antibacterial activities in the concentration range of 1-2 mg/ml. Some correlations between the chemical composition of the oils and their antibacterial activity was observed. All the essential oils tested showed marked antispasmodic effects on rabbit jejunum at about 1 × 10−5%. The antibacterial together with the antispasmodic effects may explain the extensive use of A. herba alba in folk medicine.