Various harvest times of Tanacetum perthenium cv. Zardband flowers affecting its oil content and compositions

Collection stage of the flowers of feverfew had a significant effect on the essential oil content and compositions. The highest mean of essential oil content (0.55%) was extracted from the fruits which collected at fruit Set stage, while the lowest mean essential oil of flowers (0.35%) was obtained from the flowers which collected at budding step. The results of GC and GUMS analysis showed that 21, 19 and 21 compositions identified from budding, full flowering and fruit set stages respectively. The essential oil compositions of various harvest times of feverfew flowers are different, the fluctuations of amount of the main components the oil such as camphor, chrynsanthenyl acetac, camphene and alpha-pinene is not too high.