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.