What are the white fungus on the back of the leaves?​

This is white rust, a fungal disease caused by damp conditions leading to rot. Therefore, the following steps are needed:​​

1. Trim off leaves with diseased patches (retain 70% of the foliage on the tree).​
2. After pruning, you can spray Mr Ganick Organic Plant Acid to eliminate the virus and aid in plant recovery.​
3. Avoid planting too densely. Leave about a 20% gap between plants to allow for ventilation.​

When using Mr Ganick Organic Plant Acid, please note:

1. Shake the bottle before use.​
2. Apply in the morning and avoid spraying plants under direct sunlight.​
3. Spray once a week on both leaves and tree trunk.​
4. For preventive or mild cases, consider spraying once a week; for severe conditions, spray every three days.