fungal infection on Rubber Plant
Quick answer
If your Rubber Plant has fungal infection, the most likely cause is: Fungal infections in Ficus elastica typically manifest as secondary opportunistic pathogens (Cercospora, Myrothecium, Phyllosticta) invading tissue compromised by environmental stress. High humidity (>70%) combined with poor air circulation creates microclimates where fungal spores germinate on leaf surfaces. Overwatering-induced root rot often precedes foliar fungal issues by weakening the plant's systemic defenses.
Start here:
- 1. Identify fungal spots by irregular margins with yellow halos spreading across multiple leaves
- 2. Remove and dispose of infected leaves immediately; do not compost
Why Rubber Plant gets fungal infection
Ficus elastica
Fungal infections in Ficus elastica typically manifest as secondary opportunistic pathogens (Cercospora, Myrothecium, Phyllosticta) invading tissue compromised by environmental stress. High humidity (>70%) combined with poor air circulation creates microclimates where fungal spores germinate on leaf surfaces. Overwatering-induced root rot often precedes foliar fungal issues by weakening the plant's systemic defenses.
How to reverse fungal infection on Rubber Plant
- 1
Identify fungal spots by irregular margins with yellow halos spreading across multiple leaves
- 2
Remove and dispose of infected leaves immediately; do not compost
- 3
Improve air circulation with small fan pointing near (not directly at) plant
- 4
Apply copper-based fungicide or neem oil spray to remaining foliage every 7-10 days
- 5
Check soil moisture—if wet >7 days, unpot and inspect for root rot contributing to systemic stress
Keep fungal infection off this Rubber Plant
Maintain 40-60% humidity with good airflow via fan or open windows. Avoid overhead watering that wets leaves. Quarantine new plants for 2-3 weeks. Water only when top 2-3 inches of soil are dry.