Parthenium hysterophorus (Heliantheae: Asteraceae) is regarded as one of the worst weeds because of its invasiveness, fast growing habit and economic and environmental impacts. The vigorous mode of reproduction and the ability to possess of an arsenal of secondary metabolites has given it the status of invasive alien species. This noxious weed possesses large aid persistent soil seed bank, high seed germination rate and ability to undergo dormancy under unfavorable periods. It is able to invade all disturbed land including farms, pastures and vacant lots and grows profusely along roadsides and railway tracks.