Chemical composition and antimicrobial activity of the essential oil of Artemisia lobelii All.

The composition of the essential oil of the aerial parts of Artemisia lobel ii during four stages of the growing cycle (full foliation stage, pl e-bloo m, full bloom and post-bloom stage; between June and October) were studied by GC/MS. The major constituents of the oil were camphor (33.2-36.8%), 1,S- cineole (15.2-21.1%) and artemisia ketone (6.0-24.2%). The antimicrobial ac tivity of oil against Escherichia cell, Klebsiella pneumoniae. Pseudomonas aeruginosa and Staphylococcus aureus was investigated. It was found that th e oil showed strong activity against Pseudomonas aeruginosa.