The weed that causes Asthma is

Solution (By Examveda Team)

The weed that causes Asthma is Parthenium.
Parthenium hysterophorus is a noxious weed in America, Asia, Africa and Australia. This weed is considered to be a cause of allergic respiratory problems, contact dermatitis, mutagenicity in human and livestock.
It is an annual herb with a deep taproot and an erect stem that becomes woody with age.