Toxic!IMAGE LINK: http://www.flickr.com …7836045450/in/photostream
'Congress grass' or Parthenium hysterophorus, a toxic weed, is a native of Tropical America. Scientists describe it as a "poisonous, allergic and aggressive weed posing a serious threat to human beings and livestock." It causes health hazards such as skin allergy, hay fever and asthma in human beings, and is toxic to livestock.
It was first introduced in India due to contaminated PL-480 wheat imported from the United States, and is also known as 'Congress Grass' due to the Congress party government which imported the wheat. Parthenium is not native to India, but it has spread like wildfire, affecting both farm and waste land. It now covers millions of hectares across the length and breadth of the country. The presence of Parthenium in cropped lands results in yield reduction by up to 40 per cent. The pollen grains inhibit fruit set in tomato, brinjal (egg plant), beans, etc.