Septoria nodorum-Septoria Glume Blotch.jpg

Septoria glume blotch

Area of impact:  Head

Description:  Gray-brown blotches form on the tips of the glumes developing into dark pinpoint structures. These structures are the source of spores.

Pathogen involved:  Stagonospora nodorum (a fungus)

Timing/Conditions:  Most likely to occur during periods of extended wetness.

Contributing factors:  Spores originate from infested wheat stubble or blow or splash onto wheat heads.

Management practices:  Plant resistant varieties and disease-free seed and avoid nitrogen excesses or deficiencies.

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