Informational table showing disease name, symptoms, pathogen/cause, and management of Norfolk Island Pine diseases. Disease Symptoms Pathogen/Cause Management Anthracnose Small dead areas form on needles and the entire needle dies. Small black fungal fruiting bodies are seen in the dead tissue. Large portions of branches brown and needles fall. Colletotrichum derridis Avoid overhead watering. Keeping the surface of the foliage dry will prevent this disease. Branch Droop Excessive drooping of branches although trunk is straight. Plants develop poorly. Low light intensity Provide at least 6000 ft-c of light to plants more than 6 inches tall. Root Rot Plants grow slowly and wilt. Roots are small, brown to black, and are soft and rotting. Cylindrocladium or Pythium Pot in pasteurize mix. Maintain even soil moisture.Apply a fungicide to protect plants. Yellowing Branch tips and the main growing tip is yellow instead of dark green. Micronutrient deficiency Apply a micronutrient solution.

Prepared by Gary W. Moorman, Professor of Plant Pathology