Norfolk Island Pine Diseases

Informational table showing disease name, symptoms, pathogen/cause, and management of Norfolk Island Pine diseases.
Norfolk Island Pine Diseases - Articles
Norfolk Island Pine Diseases
DiseaseSymptomsPathogen/CauseManagement
AnthracnoseSmall 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 derridisAvoid overhead watering. Keeping the surface of the foliage dry will prevent this disease.
Branch DroopExcessive drooping of branches although trunk is straight. Plants develop poorly.Low light intensityProvide at least 6000 ft-c of light to plants more than 6 inches tall.
Root RotPlants grow slowly and wilt. Roots are small, brown to black, and are soft and rotting.Cylindrocladium or PythiumPot in pasteurize mix. Maintain even soil moisture.Apply a fungicide to protect plants.
YellowingBranch tips and the main growing tip is yellow instead of dark green.Micronutrient deficiencyApply a micronutrient solution.

Prepared by Gary W. Moorman, Professor of Plant Pathology

Authors

Gary W. Moorman, Ph.D.