NC State Extension

Stagonospora Nordorum Blotch or “SNB”

Stagonospora Nodorum Blotch Identification and Management

The lesions of Stagonospora leaf blotch are normally brown or tan, surrounded by a thin, yellow halo. Lesions caused by Stagonospora leaf blotch are more irregular in shape and often have a darker color than those of tan spot. The presence of small, honey-colored fungal reproductive structures is diagnostic for Stagonospora nodorum blotch; however, these reproductive structures are only visible with considerable magnification.

Management:
Variety resistance in 2014 and 2015, Foliar Fungicides, crop rotation, fungicide seed treatment.

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