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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