Powdery mildew (Leveillula taurica / Oidiopsis taurica)
The disease is characterised by a white coating resembling a fine talcum powder on lower and upper leaf surfaces. The white coating is the fungal growth. Severe infection causes the affected leaves to roll upward and eventually scorching. The disease also attacks stems, flower buds and okra pods. Infection occurs when humidity is in the range of 52 to 75% and air temperatures are around 26 to 27 °C.
- Practise field sanitation.
- Do not grow okra or related crops like cotton in succession.
- Use sulphur based fungicides (in conventional production) or sulphur (in organic production).