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 chlorothalonil, mancozeb, or thiophanate methyl + mancozeb.
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.

Fungicides mentioned above:

COMMON NAME	TRADE NAME
chlorothalonil	Daconil 2787
mancozeb	Dithane, Pentathlon, Protect T/O
thiophanate methyl + mancozeb	Zyban