Herbicidal activity and Chemical constituents of the essential oil of Acroptilon repese (L.) Dc

Nowadays, a lot of studies have focused on allelopathic potential of plants to find new generation of herbicides, bioherbicides, to overcome some problems caused by using synthetic ones. Acroptilonrepese (L.) Dc (Asteraceae) is a perennial herb with erect stems growing to 80 cm in height. It is awide distributed plant that is native to Magnolia,Western Turkistan, Iran, Turkey and captain Asia andwas introduced into America and Canada at the beginning of previous centaury. In the present work we study the chemical composition of the aerial parts of the plant and herbicidal effects of the oilagainst some weeds. The hydrodistillated essential oil from aerial parts of A. repense were analyzed by GC-MS. Totally 26 compound were identified. Main component of the oil are: Caryophyllen oxide (9.69%), β- cubebene (9.57%), β -Caeyophyllen (9.21%) α-copaen (8.71%). The results of phytotoxocassay indicated that the essential oil obtained from Acroption repens significantly reduced seed germination of Amaranthus retroflexus and Cardaria draba, two common weed, in a dose dependent manner. On the hand, the essential oil of A. repens inhibited significantly the root growth of A.retroflexus and C. draba seedlings. The oil strongly reduced the shoot growth of A. retroflexus seedlings, as well as.

Keywords:

Acroptilon repese , essential oil , herbicidal , Amaranthus retroflexus , Cardaria draba