Invasive alien weeds

Weeds are considered a weapon used by the enemy. Since the beginning of agriculture, humans have struggled with weeds. In the 18th century, Warren Hastings, the first Governor-General of Bengal, brought water hyacinth from South America as a gift for his wife, Marian Hastings, because she liked its flowers. Parthenium hysterophorus was introduced into India through the distribution of food grains to developing countries under Public Law 480, which aimed to combat starvation and malnutrition...