The pathogen is a Puccinia rust fungus. It is the most prevalent of all the wheat rust diseases, occurring in most wheat-growing regions. It causes serious epidemics in North America, Mexico and South America and is a devastating seasonal disease  in India.
The Puccinia rust fungus is a major contributor to wheat rust diseases worldwide, affecting many regions where wheat grows. It frequently causes severe outbreaks in North America, Mexico, and South America, and it has a destructive impact on Indian agricultural seasons.