Brown Patch (Rhyzoctonia Blight)
Diagnosis
Circular patches of brown turf from 25mm to a metre in diameter.
Blades at the margins of the patches have yellow irregular shaped legions with thin brown borders.
Patches are surrounded by smokey coloured ring of mycelium.
Management
- Avoid irrigation in late afternoon and in evening prior to midnight
- Apply sulphate of potash - disease more severe in soils low in potassium
- Limit thatch thickness
- Maintain a balanced fertiliser program
- Control fungicides inc: Mancozeb