Essential Oil Composition ofPinus halepensisMill. from Three Different Regions of Algeria

Needles of Pinus halepensis Mill. were collected from three different locations at Sidi Feradj (SF), Djelfa (Dj) and Saïda (Sd) in Algeria. Their oils isolated by hydrodistillation yielding 0.5% from SF, 0.8% from Dj and 0.9% from Sd, have been investigated for their components by means of GC and GC/MS techniques. More then 41 compounds were identified in the needle oils of Sidi Feradj (SF) and Saïda (Sd) and 39 compounds in Djelfa (Dj). The main constituents of three samples of P. halepensis leaf oil were β-caryophyllene (19.8–25.8%), followed by α-humulene (6.2%) in SF and 10.5% in Sd and aromadendrene (8.5%) in Dj, while the third constituents were aromadendrene (4.2%) in SF and α-pinene (5.2%) in Dj and 6.4% in Sd.