Root and stem cankers develop. Leaves fall even if only one or a very few spots form. Twig dieback occurs if defoliation is severe. Brown to black leaf spots have yellow halos. Spathiphyllum - Older foliage wilts and yellows.
Roots die allowing the plant to be easily removed from the soil.
Sunken black spots form at the base of petioles. Brown to black leaf spots have yellow halos. Overfertilization and other plant stresses may contribute to the problem. Pot in sterile mix. Propagate from only healthy stock plants since the disease spreads rapidly in most propagation beds.