Yemen on the pathway of devastating wheat stem rust disease - News - Nature Middle East | CIHEAM Press Review | Scoop.it
Wind traveling from one continent to another is responsible for dispersing and transporting a significant amount of wheat stem rust to faraway locations. 
The deadly and devastating disease, known as wheat stem rust or black rust, covers the crop's leaves and stems with red blister-like pustules, and is caused by a fungal pathogen called Puccinia graminis.