Puccinia striiformis is a fungal pathogen that primarily affects wheat and other cereal crops. It is responsible for wheat yellow rust, a disease characterized by yellow streaks on leaves, which can lead to significant yield losses if not managed properly. The fungus thrives in cool, moist conditions and can spread rapidly through wind-borne spores. The life cycle of Puccinia striiformis involves several stages, including the production of spores that infect host plants. Effective management strategies include the use of resistant wheat varieties, crop rotation, and fungicide applications. Monitoring weather conditions is also crucial for predicting outbreaks and minimizing damage.