Parthenium [Photographs on the Left Hand Side] is a curse for the biodiversity .Chemical analysis has indicated that all the plant parts including trichomes and pollen contain toxins called sesquiterpene lactones. The major component of these toxins being parthenin and other phenolic acids such as caffeic acid, vanillic acid, anisic acid, chlorogenic acid, parahydroxy benzoic acid and panisic acid are lethal to humans and animals. Parthenium was accidentally introduced in India in around 1956 and has since spread over most part of the country. Parthenium now occurs throughout the tropical and subtropical America from southern United States of America to southern Brazil and to Northern Argentina.

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