Wheat Leaf Blotch

Wheat Leaf Blotch



Stagonospora nodorum blotch (SNB: aka Stagonospora glume blotch (SGB) or glume blotch), Septoria tritici blotch (STB; aka speckled leaf spot), and tan spot (aka yellow leaf spot), caused by Parastagonospora nodorum, Zymoseptoria tritici, and Pyrenophora tritici-repentis, respectively, often occurring together, are three economically significant wheat diseases. These diseases have the potential to reduce test weight and yield by 50% (McMullen and Adhikari, 2021). Differentiating these diseases in the field can be difficult because the symptoms bear a resemblance to one another and often infect the same plant simultaneously (Freije and Wise, 2015).

NAGC has optimized an assay so that the three wheat leaf blotch disease-causing fungal species can be identified, differentiated, and quantified in a single triplex reaction. This high-throughput detection assay will help characterize and quantitate these diseases to mitigate the diseases properly.

This project was funded in part by the National Predictive Modeling Tool Initiative


Freije, A. & Wise, K. 2015. Stagonospora Glume Blotch. Diseases of Wheat. Lafayette, IN: Purdue University.

McMullen, M. & Adhikari, T. 2021. Fungal Leaf Spot Diseases of Wheat: Tan spot, Septoria/Stagonospora nodorum blotch and Septoria tritici blotch. In: FRISKOP, A. & LIU, Z. (eds.) Plant Disease Management, NDSU Extension. Fargo, ND: North Dakota State University.

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