Dothistroma needle blight
Damage, symptoms and biology
Where environmental conditions favour infection, this disease can spread rapidly and cause significant damage. Trees can be defoliated within weeks, and mortality is common with repeated attacks.
This disease is also commonly known as red band needle blight. The life-cycle is completed in 1 year on the coast but requires 2 years in most other parts of the continent. The fungus causing the disease is most commonly observed in its conidial state (Dothistroma septospora).