Leaf Spotting Complex of Wheat Leaf spotting diseases affect wheat grown on the Canadian Prairies and the Great Plains of the United States (Figure 1). They can be caused by one or a combination of leaf spotting pathogens. Pyrenophora tritici-repentis causes tan spot on leaves and can also infect wheat kernels causing red or pink smudge and… Continue reading Blackpoint, Leaf Spotting and Smudge of Wheat