Black Spots on Aloe Vera: Bacterial Disease Treatment

A farmer in India has hundreds of Aloe Vera plants with black leaf spots and wilting, seeking a remedy.

Likely Cause: Bacterial Leaf Spot

Symptoms suggest a bacterial infection, often exacerbated by excess moisture.

Treatment Protocol

1. Copper-based fungicide/bactericide: Use products containing copper hydroxide or copper sulfate.
2. Mix per label and spray to runoff.
3. Do not add surfactant if plants are in sun (causes burn); okay in shade.
4. Repeat in 7–10 days, and again 7–10 days later.

Cultural Adjustments

• Reduce watering—aloes need well-drained soil and dry periods.
• Improve air circulation.
• Remove severely infected leaves.

Good luck with the crop.