Syngonium Diseases

Disease	Symptoms	Pathogen/Cause	Management
Bacterial Blight and Stem Rot	Very dark green spots engulf the leaf in a soft rot that smells foul. Infected tissue falls away giving the leaf a tattered appearance. When stems are infected, lower leaves wilt and die.	Erwinia	Purchase plants free of the disease. Discard infected plants and water in a manner that keeps the surface of the plants dry at all times.
Bacterial Leaf Spot	Translucent spots on leaf margins become dull green with bright yellow halos. Spot size and shape are limited by leaf veins.	Erwinia, Pseudomonas, Xanthomonas	Purchase plants free from the disease. Discard infected plants. Avoid overhead watering.
Myrothecium Leaf Spot	Tan to dark-brown leaf spots have concentric rings and fungal fruiting structures.	Myrothecium roridum	Do not apply excessive amounts of nitrogen fertilizer. Protect leaves from wounding. Apply chlorothalonil or mancozeb to protect plants.
Phosphorus Deficiency	Plants are stunted. Lower leaves have dead spots.	Lack of fertilization	Apply a balanced fertilizer solution.

COMMON NAME	TRADE NAME
chlorothalonil	Daconil 2787
mancozeb	Dithane, Mancozeb