Bacterial Leaf Spot of Houseplants (Pseudomonas)
Pseudomonas cichorii
Houseplants (general)bacterial
A common bacterial leaf spot affecting many foliage houseplants in humid conditions.
Symptoms
Water-soaked, angular-to-irregular spots on leaves that turn brown-black, sometimes with a yellow halo, worse on leaves that stay wet.
Cause & development
Documented on Spider Plant and a wide range of other foliage houseplants. EPPO code PSDMCI.
Favorable conditions
- •Wet foliage from overhead watering
- •High humidity and poor airflow
- •Overcrowded plantings
Management
- 1Water at the soil line, not the leaves
- 2Improve air circulation
- 3Remove and discard affected leaves
- 4Avoid overcrowding plants
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