Informational table showing disease name, symptoms, pathogen/cause, and management of Dracaena diseases. Disease Symptoms Pathogen/Cause Management Flecking Dracaena marginata New leaves have small white to yellow spots near their tips. Unknown Maintain moderate temperature, moisture, and light conditions. Fluoride Toxicity Long tan to dark brown areas form in the white stripes of "Warneckii" leaves. Leaf tips are yellow or dead on "Janet Craig". Tan dead areas with bright yellow borders form along the leaf margin of "Massangeana" leaves. Excess fluoride Maintain soil pH between 6 and 6.5. Avoid using perlite, superphosphate, and other fluoride-containing soil amendments. Do not irrigate with water containing 1 ppm fluoride. Fusarium Leaf Spot Young leaves have reddish to tan spots with wide, yellow halos. Spotting occurs close to the base of the leaves. Fusarium moniliforme Avoid overhead watering. Apply a fungicide to protect healthy plants. Soft Rot Rooted cuttings have a soft, brown rot and a foul odor. Lower leaves collapse. Erwinia carotovora pv. carotovora, or Erwinia chrysanthemi Purchase plants free of the disease. Discard infected plants.

Fluoride toxicity.

Prepared by Gary W. Moorman, Professor of Plant Pathology