Septoria leaf and glume blotch of wheat

Septoria diseases are caused by two fungi, Septoria tritici (leaf blotch) and Septoria nodorum (glume blotch). Both fungi can be seedborne and/or live from one season to the next on infected wheat stubble and other grass hosts. In the fall, ascopores of the sexual stage of S. tritici are blown down wind from fields with standing stubble. Ascospores of the sexual stage of S. nodorum are less common, but also move with wind from standing stubble.