Disease	Symptoms	Pathogen/Cause	Management
Cylindrocladium Root and Petiole Rot	Lower leaves yellow and wilt. Dark-brown spots with halos form on leaves. Roots decay.	Cylindrocladium spathiphylli	Purchase plants free of pathogen. Discard infected plants. Apply triflumizole to protect plants.
Magnesium Deficiency	Plants are stunted and vigor reduced. Tissue between leaf veins yellows and may be bronzed while veins remain green.	Lack of fertilization	Apply magnesium sulfate (Epsom salts) at 1/4 lb per 10 gallons of water.
Marginal Leaf Burn	Leaf tips and margins yellow and die. Roots darken and die.	Overfertilization	Leach pots if no slow-release fertilizer is present. Maintain moderate levels of fertilizer.
Virus	A mild mosaic pattern of light and dark green appears on some leaves. Other leaves, while still infected, are symptomless.	Dasheen mosaic virus	Discard infected plants. Maintain good insect control in the greenhouse.

COMMON NAME	TRADE NAME
triflumizole	Terraguard