PESTS AND DISEASES OF FORESTRY IN NEW ZEALAND
Symptoms observed in September
Dothistroma needle blight occurs all year, but first appears on current foliage about December.
Physiological needle blight occurs from June to November.
Red needle cast occurs from April to October
Cyclaneusma needle cast occurs from September to November.
2. Narrow by tree age:
- Symptoms observed in September, tree age from planting to five years
- Symptoms observed in September, tree age from six to fifteen years
- Symptoms observed in September, tree age from sixteen to twenty years
- Symptoms observed in September, tree age over twenty years
