Scald is probably the most well-known and encountered barley disease in NZ.
Look out for:
- Pale green, ‘watersoaked’ lesions
- Mature lesions showing brown borders with a pale centre
- Cool, moist conditions
Initially seen as surface patches of white mycelium, powdery mildew develops to cover the entire leaf. Mature infections often have black spore cases present.
The disease is wind borne and thrives in cool, wet weather.
While normally modest, yield losses of 40% have been recorded.