Bacterial leaf streak and bacterial black chaff of cereals have become more prevalent in the Prairie provinces recently due to a combination of favourable conditions and increased awareness. Bacterial leaf streak is an important disease of cereal crops all over the world and can cause a significant reduction in yield. It has been reported that severe infections can reduce yield by up to 50 per cent. In Canada, research is ongoing to estimate yield losses across the Canadian Prairies. Learn more about this disease, the life cycle for BLS, signs and symptoms, how to manage the disease and more in this joint document created as a collaboration between Alberta Barley, Alberta Wheat, Sask Barley, Sask Wheat and Manitoba Crop Alliance.