Cordyline (Ti Plant) Diseases

Informational table showing disease name, symptoms, pathogen/cause, and management of Cordyline (Ti Plant) diseases.
Cordyline (Ti Plant) Diseases - Articles
Cordyline (Ti Plant) Diseases
DiseaseSymlptomsPathogen/CauseManagement
Bacterial Leaf Spot and Stem RotInfected leaves and stems become wet and slimy. Cuttings rot. Roots of established plants turn black and die.Erwinia chrysanthemi, E. carotovora pv. carotovoraPurchase plants free of the disease. Discard infected plants.
Fluoride ToxicityLeaf tips and margins brown and die.Excessive fluorideMaintain a soil pH between 6.0 and 6.5. Do not use water containing more than 0.25 ppm fluoride. Do not use a potting mix with perlite or superphosphate fertilizer.
Fusarium Leaf SpotTan to red-brown, oval spots form on the tips of young leaves. Spots have a bright yellow halo.Fusarium moniliformeAvoid overhead watering. Apply a fungicide to protect healthy plants.
Fusarium Stem and Root RotLower leaves yellow and wilt. Roots are brown. Tan spots form on the stem at the soil line and may b covered with powdery, yellowish spores.FusariumAvoid overhead watering.Apply a fungicide to protect healthy plants. Discard infected plants.
Phyllosticta Leaf SpotSmall, round to irregular spots form on older leaves. Spots have purple borders and yellow halos.Phyllosticta dracaenaeAvoid overhead watering. Apply a fungicide to protect healthy plants.
Phytophthora Leaf SpotLeaves near the soil are water-soaked and have brown, irregular, zonate dead areas.Phytophthora nicotianaePlant in pasteurized mix. Discard infected plants. Apply a fungicide to protect healthy plants.
Poor ColorPlants appear dull, mostly dark purple to maroon and lack rose or pink tints.Plants appear dull, mostly dark purple to maroon and lack rose or pink tints.Maintain moderate fertilizer level. Shade in the summer but add light in the winter if too low. Maintain moderate temperatures.
Tip DeathVery young leaves die but the plant recovers.Damage from fertilizer or leaf shining chemicals.Keep fertilizer off the growing point and young leaves. Use leaf shining chemicals carefully.

Prepared by Gary W. Moorman, Professor of Plant Pathology

Authors

Gary W. Moorman, Ph.D.