Fungal Leaf Spot on pothos
What's Happening
Fungal leaf spot diseases (Phyllosticta, Colletotrichum) present as circular to irregular brown spots with defined margins, often with concentric rings or dark fruiting bodies in center. Unlike bacterial spots, these lack yellow halos but may have tan centers. Spread occurs through splashing water, contaminated tools, and poor air circulation. Spores germinate on wet leaf surfaces within 6-12 hours of moisture.
How to Fix It
- 1
Remove all affected leaves immediately: Cut 1 inch below spots with sterile scissors
- 2
Apply fungicide: Use sulfur-based or copper fungicide following label directions
- 3
Stop misting: Water only at soil level to prevent leaf wetness
- 4
Improve airflow: Position fan to keep leaves dry without causing drafts
- 5
Isolate plant: Keep away from other plants until 2 weeks after symptoms resolve
- 6
Sterilize tools: Wipe scissors with 70% alcohol between every cut
How to Prevent It
Maintain 40-60% humidity without misting. Ensure 12-18 inches spacing between plants for airflow. Water at soil level only. Inspect new plants before introducing to collection.
Related Problems
Same Problem on Other Plants
Go Deeper
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