1233 GMT March 28, 2020
"Professor Chen from Washington State University helped us name the new strains," Safar Ali Safavi, PhD graduate in plant pathology from the university, who led the research, said.
Dr. Asadollah Babay-Ahari, Dr. Farzad Afshari and Dr. Mehdi Arzanlou from the university were other investigators of the study.
Stripe rust is a fungal disease of barley caused by Puccinia striiformis f. sp. Hordei, which is a plant pathogen.
The disease initially develops at a small loci within a field, spreads rapidly and causes significant losses in areas where climatic conditions are cool and wet.
Infections produce linear, orange-yellow pustules on leaves and/or heads. As the disease progresses, pustules coalesce to form long stripes between leaf veins.
On susceptible cultivars, entire leaf blades may be covered with pustules. The black spore stage develops as linear black pustules covered by the leaf epidermis.