Department of Plant Pathology Plant Disease Fact Sheets

Gary Moorman
Professor of Plant Pathology

Pothos Diseases

Disease	Symptoms	Pathogen/Cause	Management
Bacterial Leaf Spot	Water-soaked spots with yellow halos spread rapidly on leaves. Centers of the spots fall out under wet conditions.	Pseudomonas cichorii	Avoid overhead watering. Discard infected plants.
Pythium Root Rot	Cuttings have poor root systems and yellow leaves. Leaves of established plants yellow and die. Stems have a mushy black rot.	Pythium	Plant in a potting mix free of pathogens. Apply metalaxyl, mefenoxam, fosetyl-Al, or etridiazole to protect healthy plants.
Rhizoctonia Stem Rot	Stems at the soil level are killed. Under wet conditions, a fine webbing of fungal growth can be observed on the soil surface near the infected stems.	Rhizoctonia	Plant in a potting mix free of pathogens. Apply iprodione as a spray directed at the base of the stems. Or apply PCNB.

COMMON NAME TRADE NAME

etridiazole Terrazole, Truban

fosetyl-Al Aliette

iprodione Chipco 26019

mefenoxam Subdue Maxx

metalaxyl Subdue

PCNB Terraclor

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Last modified Wednesday, August 2, 2006