fungal · moderate
Powdery Mildew
White powder-like patches on leaf surfaces that can expand when airflow and humidity conditions favor fungal growth.
Symptoms
- White powdery patches
- Surface-level leaf coating
- Expansion across nearby leaves
- Reduced leaf vigor when advanced
Lookalikes
- Foliar spray residue
- Mineral residue
- Dust on leaf surface
- Light bleaching
Quick triage
- Check whether the white material appears powdery rather than wet or crystalline.
- Inspect both upper and lower leaf surfaces.
- Review recent spray or residue events before assuming infection.
- Capture angled photos so surface texture is visible.
Prevention checklist
- Increase gentle airflow.
- Avoid overcrowded foliage.
- Track humidity swings during lights-off or cool periods.
- Document recent spray history with any upload.
Photo examples to collect
Example 1
Close-up of white leaf surface growth
Placeholder guidance only. Use your own original photos with upload consent.
Example 2
Side angle showing surface texture
Placeholder guidance only. Use your own original photos with upload consent.
Example 3
Whole canopy image showing spread pattern
Placeholder guidance only. Use your own original photos with upload consent.