chemical composition and antimicrobial and allelopathic activity of tunisian conyza sumatrensis (retz.) e.walker essential oils. | conyza sumatrensis (retz.) e.walker (asteraceae) is a spontaneous annual herb, fairly widespread throughout tunisia, which has rarely been studied or valued in any sector. essential oils were obtained by hydrodistillation of different parts (flower heads, leaves, stems, and roots) of c. sumatrensis plants, which were collected in autumn (november 2007) at the flowering stage in the area of monastir, tunisia. in total, 98 compounds, representing 88.1-99.3% of the oil composition, were identified ... | 2013 | 23418168 |