Parthenium hysterophorus L. commonly known as Congress grass is an aggressive and noxious weed among top worst weeds in the world. Now, it is widely distributed in all the crops of almost all the states of the India threatening natural agro-ecosystems and biodiversity. It a great menace due to causing skin allergy, asthma in human being and animals too. Parthenium has got major weed status in India. This weed alone may lowered the average yield of cropup to 40% and forage production about 90%. Sustainable crop production of many crops, grasslands and orchard ecosystems are being greatly affected by invasion of this noxious weed in the country. Various approaches viz., physical, mechanical, agronomical, chemical and biological have been employed for Parthenium management but most of them are not so effective due to invading characteristics of this weed as well as other limitations. Integrated weed management practices have been found effective to minimize this noxious weed. An attempt has been made to review its impact on various crops production, human and animal health and its effective management.

Keywords: Noxious; Agro-Ecosystem; Forage.